{"product_id":"msa-gmi-iodine-p100-cartridge","title":"MSA 815184 GMI Iodine Vapor \/ P100 Cartridge for Comfo Respirators — Box of 6","description":"\u003cdiv style=\"background:#1a1a1a;border:2px solid #ff9800;border-radius:6px;padding:16px 20px;margin:0 0 24px 0;color:#e0e0e0;font-size:0.95em;line-height:1.5;\"\u003e\n\u003cstrong style=\"color:#ff9800;\"\u003e★ WC Safety Editorial Review — MSA GMI Radioiodine \/ P100 Cartridge\u003c\/strong\u003e\u003cbr\u003eRated 4.6\/5 — radioiodine (I\u003csub\u003e2\u003c\/sub\u003e and CH\u003csub\u003e3\u003c\/sub\u003eI) protection plus P100 for the MSA Comfo bayonet platform. The only MSA Comfo cartridge designed for nuclear medicine and radiopharmacy environments.\u003cdiv style=\"margin-top:12px;display:flex;flex-wrap:wrap;gap:8px;\"\u003e\n\u003ca href=\"\/blogs\/product-reviews\/msa-815184-gmi-iodine-p100-cartridge-review\" style=\"display:inline-block;background:#ff9800;color:#1a1a1a;padding:8px 18px;text-decoration:none;font-weight:700;border-radius:4px;font-size:0.9em;\" title=\"Read the full MSA GMI Radioiodine \/ P100 Cartridge editorial review\"\u003eRead Full Review →\u003c\/a\u003e\u003ca href=\"\/collections\/msa-respirator-filters-and-cartridges\" style=\"display:inline-block;background:#1a2733;color:#e0e0e0;padding:8px 18px;text-decoration:none;font-weight:700;border-radius:4px;border:1px solid #ff9800;font-size:0.9em;\" title=\"Compare all MSA respirator cartridges and filters\"\u003eCompare All MSA Cartridges →\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-description-rich\"\u003e\n\n\u003c!-- 0. EDITORIAL REVIEW BOX --\u003e\n\u003cdiv class=\"wc-review-box\" style=\"border:2px solid #ff9800;background:#2a2520;border-radius:8px;padding:20px 24px;margin:0 0 24px 0;color:#f5e6d3;\"\u003e\n  \u003cdiv style=\"display:flex;align-items:center;gap:12px;margin-bottom:12px;flex-wrap:wrap;\"\u003e\n    \u003cspan style=\"background:#ff9800;color:#1a1a1a;font-weight:bold;padding:4px 12px;border-radius:4px;font-size:0.95em;\"\u003eEDITORIAL REVIEW: 4.6\/5\u003c\/span\u003e\n    \u003cspan style=\"color:#ffb74d;font-size:0.9em;\"\u003eWC Safety Review — MSA GMI Iodine Vapor \/ P100 Cartridge\u003c\/span\u003e\n  \u003c\/div\u003e\n  \u003cp\u003e\u003cstrong\u003eBest For:\u003c\/strong\u003e Nuclear medicine technologists, radiopharmacists, nuclear power plant maintenance crews, and isotope laboratory workers who need simultaneous NIOSH-approved protection against radioactive iodine vapor (elemental I\u003csub\u003e2\u003c\/sub\u003e and methyl iodide CH\u003csub\u003e3\u003c\/sub\u003eI) plus P100-grade particulate filtration on an MSA Comfo-platform full-face or half-mask respirator.\u003c\/p\u003e\n  \u003cp\u003e\u003cstrong\u003eNot For:\u003c\/strong\u003e General organic vapor or acid gas hazards (use the \u003ca href=\"\/products\/msa-gma-organic-vapor-cartridge\" style=\"color:#ff9800;\"\u003eMSA GMA\u003c\/a\u003e or \u003ca href=\"\/products\/msa-gmb-acid-gas-cartridge\" style=\"color:#ff9800;\"\u003eMSA GMB\u003c\/a\u003e instead), chlorine-only environments, confined-space or IDLH atmospheres requiring an SCBA, or any MSA Advantage-series half-mask respirator with its snap-on filter system.\u003c\/p\u003e\n  \u003cp\u003e\u003cstrong\u003eBottom Line:\u003c\/strong\u003e The GMI is one of the few commercially available NIOSH-approved iodine\/P100 cartridges for the MSA bayonet platform — if you run Comfo respirators in a nuclear or isotope setting this is the purpose-built choice; for multi-gas chemical environments the \u003ca href=\"\/products\/msa-gme-p100-multigas-particulate-cartridge\" style=\"color:#ff9800;\"\u003eMSA GME\/P100\u003c\/a\u003e covers broader hazards at lower cost.\u003c\/p\u003e\n  \u003cp style=\"font-size:0.9em;color:#cbb89e;\"\u003eEditorial assessment by the WC Safety Editorial Team. Scoring reflects published manufacturer specifications, application fit, compatibility, and category expertise. WC Safety did not laboratory-test this product.\u003c\/p\u003e\n  \u003cp\u003e\u003ca href=\"\/blogs\/product-reviews\/msa-815184-gmi-iodine-p100-cartridge-review\" style=\"color:#ff9800;font-weight:bold;\"\u003eRead the full review\u003c\/a\u003e →\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c!-- 1. OVERVIEW --\u003e\n\u003ch2 style=\"color:#ff9800;\"\u003eMSA GMI Iodine Vapor \/ P100 Cartridge Overview\u003c\/h2\u003e\n\u003cp style=\"color:#e0e0e0;\"\u003eThe MSA GMI (part number 815184) is a dual-protection cartridge rated for radioactive and non-radioactive iodine vapor — including elemental iodine (I\u003csub\u003e2\u003c\/sub\u003e) and methyl iodide (CH\u003csub\u003e3\u003c\/sub\u003eI) — combined with NIOSH P100 particulate filtration at 99.97% efficiency. It ships as a \u003cstrong\u003ebox of 6 cartridges at $185.56 ($30.93 per cartridge)\u003c\/strong\u003e, making it a specialty item priced for institutional and industrial buyers rather than casual users. The GMI threads onto the bayonet mount shared by all MSA Comfo-platform respirators and is the only cartridge in the \u003ca href=\"\/collections\/msa-respirator-filters-and-cartridges\" style=\"color:#4fc3f7;\"\u003eMSA Comfo filter lineup\u003c\/a\u003e purpose-designed for iodine and radioisotope environments.\u003c\/p\u003e\n\n\u003cp style=\"color:#e0e0e0;\"\u003eBefore selecting this cartridge, confirm the hazard class. Iodine-vapor exposure in nuclear medicine and radiopharmacy is distinct from organic vapor or acid-gas hazards — if you work with general solvents or chlorine instead, the \u003ca href=\"\/products\/msa-gma-p100-organic-vapor-particulate-cartridge\" style=\"color:#4fc3f7;\"\u003eMSA GMA\/P100\u003c\/a\u003e or \u003ca href=\"\/products\/msa-gmb-p100-acid-gas-particulate-cartridge\" style=\"color:#4fc3f7;\"\u003eMSA GMB\/P100\u003c\/a\u003e are the correct choices. For an overview of how to match hazard classes to cartridge types, see the \u003ca href=\"\/blogs\/guides\/respirator-filter-types-explained\" style=\"color:#4fc3f7;\"\u003erespirator filter types explained guide\u003c\/a\u003e and the \u003ca href=\"\/blogs\/guides\/how-to-choose-a-respirator-cartridge\" style=\"color:#4fc3f7;\"\u003ecartridge selection guide\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cdiv style=\"margin:20px 0;\"\u003e\n  \u003ca href=\"https:\/\/www.amazon.com\/dp\/B016N36FOC?tag=wcsafety04-20\" style=\"display:inline-block;background:#ff9800;color:#1a1a1a;padding:10px 20px;border-radius:4px;text-decoration:none;font-weight:bold;margin:4px 8px 4px 0;\"\u003eBuy on Amazon\u003c\/a\u003e\n  \u003ca href=\"\/products\/msa-gmi-iodine-p100-cartridge\" style=\"display:inline-block;background:#2a2520;color:#ff9800;border:2px solid #ff9800;padding:10px 20px;border-radius:4px;text-decoration:none;font-weight:bold;margin:4px 0;\"\u003eShop WC Safety\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-size:0.85em;color:#888;margin:4px 0 12px;\"\u003e\u003cem\u003eAffiliate disclosure: WC Safety earns a commission on Amazon purchases at no cost to you.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003c!-- 2. WHERE IT FITS IN RESPIRATOR SELECTION --\u003e\n\u003ch2 style=\"color:#ff9800;\"\u003eWhere the MSA GMI Fits in Respirator Selection\u003c\/h2\u003e\n\u003cp style=\"color:#e0e0e0;\"\u003eCartridge selection must start with the confirmed hazard class — not the respirator you already own. Iodine vapor, particularly radioactive iodine-131 used in nuclear medicine and nuclear power applications, requires a sorbent medium that reacts with and retains iodine. The GMI uses activated carbon impregnated with specific chemical reagents that bond elemental iodine and methyl iodide rather than simply adsorbing them the way standard organic-vapor charcoal does. The P100 layer then captures radioactive particulate above 0.3 microns at 99.97% efficiency.\u003c\/p\u003e\n\n\u003cp style=\"color:#e0e0e0;\"\u003eThis places the GMI in a narrow but non-negotiable specialty tier. Workers in nuclear power plant maintenance who handle radioactive iodine-laden coolant gases, nuclear medicine techs who handle I-131 vials, and radiopharmacy compounding staff are the primary audience. If your hazard profile includes multiple gas classes — for instance iodine \u003cem\u003eplus\u003c\/em\u003e organic vapors — consult your industrial hygienist, as a single-cartridge solution may not address the full exposure. The \u003ca href=\"\/blogs\/guides\/how-to-choose-a-respirator-cartridge\" style=\"color:#4fc3f7;\"\u003ecartridge selection guide\u003c\/a\u003e and the \u003ca href=\"\/blogs\/guides\/respirator-filter-types-explained\" style=\"color:#4fc3f7;\"\u003efilter types guide\u003c\/a\u003e both cover multi-hazard scenarios in detail.\u003c\/p\u003e\n\n\u003cp style=\"color:#e0e0e0;\"\u003eWithin the \u003ca href=\"\/collections\/msa-respirator-filters-and-cartridges\" style=\"color:#4fc3f7;\"\u003eMSA Comfo cartridge family\u003c\/a\u003e, the GMI sits above the single-gas cartridges (GMA, GMB, GMD) and the multi-gas options (GME, GMT) in terms of specialization. If your site uses a different respirator platform, review whether your facepiece takes bayonet-mount cartridges before purchasing — the GMI will not thread onto Advantage-series snap-on ports or 3M bayonet respirators.\u003c\/p\u003e\n\n\u003c!-- 3. WHO SHOULD BUY --\u003e\n\u003ch2 style=\"color:#ff9800;\"\u003eWho Should Buy the MSA GMI Iodine \/ P100 Cartridge?\u003c\/h2\u003e\n\n\u003ch3 style=\"color:#ffb74d;\"\u003eBuy the GMI if you:\u003c\/h3\u003e\n\u003cul style=\"color:#e0e0e0;\"\u003e\n  \u003cli\u003eWork in nuclear medicine, radiopharmacy, or nuclear power and handle radioactive or non-radioactive iodine vapor as a documented site hazard\u003c\/li\u003e\n  \u003cli\u003eAlready own or are buying an \u003ca href=\"\/collections\/msa-full-face-mask-respirator\" style=\"color:#4fc3f7;\"\u003eMSA Comfo full-face respirator\u003c\/a\u003e (Ultra-Elite, Ultra-Twin) or an MSA Comfo Classic \/ Comfo II half-mask with bayonet mounts\u003c\/li\u003e\n  \u003cli\u003eNeed simultaneous P100-grade particulate protection alongside the iodine sorbent — both in one cartridge, one qualification, one change-out schedule\u003c\/li\u003e\n  \u003cli\u003eProcure respirator consumables for an institutional safety program where NSN\/part-number traceability matters (part 815184 appears on government and nuclear utility qualified product lists)\u003c\/li\u003e\n  \u003cli\u003eRequire NIOSH-approved protection confirmed for methyl iodide (CH\u003csub\u003e3\u003c\/sub\u003eI), not just elemental iodine\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color:#ffb74d;\"\u003eDon't buy the GMI if you:\u003c\/h3\u003e\n\u003cul style=\"color:#e0e0e0;\"\u003e\n  \u003cli\u003eFace organic vapor hazards (solvents, paints, pesticides) — the \u003ca href=\"\/products\/msa-gma-p100-organic-vapor-particulate-cartridge\" style=\"color:#4fc3f7;\"\u003eMSA GMA\/P100 cartridge\u003c\/a\u003e is the correct choice\u003c\/li\u003e\n  \u003cli\u003eFace acid gas hazards such as chlorine, hydrogen chloride, or sulfur dioxide — use the \u003ca href=\"\/products\/msa-gmb-p100-acid-gas-particulate-cartridge\" style=\"color:#4fc3f7;\"\u003eMSA GMB\/P100\u003c\/a\u003e\n\u003c\/li\u003e\n  \u003cli\u003eNeed combined organic vapor plus acid gas protection — the \u003ca href=\"\/products\/msa-gmc-p100-ov-acid-gas-particulate-cartridge\" style=\"color:#4fc3f7;\"\u003eMSA GMC\/P100\u003c\/a\u003e covers that combination\u003c\/li\u003e\n  \u003cli\u003eOwn an MSA Advantage-series half-mask (200, 290, 420, 1000) — that platform uses snap-on filters, not bayonet cartridges\u003c\/li\u003e\n  \u003cli\u003eWork with mercury vapor — the \u003ca href=\"\/products\/msa-mersorb-p100-mercury-vapor-cartridge\" style=\"color:#4fc3f7;\"\u003eMSA Mersorb\/P100\u003c\/a\u003e is purpose-built for mercury and is a separate cartridge chemistry\u003c\/li\u003e\n  \u003cli\u003eNeed ammonia or methylamine protection — select the \u003ca href=\"\/products\/msa-gmd-p100-ammonia-particulate-cartridge\" style=\"color:#4fc3f7;\"\u003eMSA GMD\/P100\u003c\/a\u003e instead\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- 4. PROTECTION TABLE --\u003e\n\u003ch2 style=\"color:#ff9800;\"\u003eWhat Does the MSA GMI Protect Against?\u003c\/h2\u003e\n\u003cp style=\"color:#e0e0e0;\"\u003eThe table below maps the GMI's NIOSH-rated protection to specific hazard classes and buyer guidance:\u003c\/p\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;background:#1a1a1a;color:#e0e0e0;margin:16px 0;\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth style=\"border:1px solid #444;padding:10px;color:#ffb74d;text-align:left;\"\u003eHazard\u003c\/th\u003e\n      \u003cth style=\"border:1px solid #444;padding:10px;color:#ffb74d;text-align:left;\"\u003eProtection Fit\u003c\/th\u003e\n      \u003cth style=\"border:1px solid #444;padding:10px;color:#ffb74d;text-align:left;\"\u003eBuyer Guidance\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eElemental Iodine Vapor (I\u003csub\u003e2\u003c\/sub\u003e)\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003ePrimary design hazard — NIOSH approved\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eCorrect choice for nuclear power, isotope labs, radiopharmacy\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eMethyl Iodide (CH\u003csub\u003e3\u003c\/sub\u003eI)\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003ePrimary design hazard — NIOSH approved\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eCritical for nuclear medicine I-131 handling protocols\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eRadioactive Iodine Isotopes (I-131, I-125)\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eCovered via iodine-vapor sorbent + P100 particulate layer\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eAlways pair with site radiation control procedures — cartridge is one layer of a defense-in-depth program\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eP100 Particulate (≥0.3 µm aerosols, dusts, mists)\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003e99.97% filtration efficiency — NIOSH P100\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eIntegrated — no separate P100 filter required on Comfo bayonet ports\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eOil-Based Aerosols\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eP100 rating covers oil-based mists (unlike R95\/N95)\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eSuitable where lubricant mists co-exist with iodine hazards\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eGeneral Dust \/ Biological Aerosols\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eCaptured by P100 layer\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eSecondary benefit; GMI is not purchased primarily for dust protection\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003c!-- 5. WHAT IT DOES NOT PROTECT AGAINST --\u003e\n\u003ch2 style=\"color:#ff9800;\"\u003eWhat the MSA GMI Does NOT Protect Against\u003c\/h2\u003e\n\u003cul style=\"color:#e0e0e0;\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOrganic vapors (solvents, VOCs):\u003c\/strong\u003e The GMI's impregnated carbon is optimized for iodine chemistry, not general organic vapor adsorption. Use the \u003ca href=\"\/products\/msa-gma-organic-vapor-cartridge\" style=\"color:#4fc3f7;\"\u003eMSA GMA cartridge\u003c\/a\u003e for solvent environments.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAcid gases (chlorine, HCl, SO\u003csub\u003e2\u003c\/sub\u003e):\u003c\/strong\u003e Acid-gas sorbents are not present in the GMI formulation. The \u003ca href=\"\/products\/msa-gmb-acid-gas-cartridge\" style=\"color:#4fc3f7;\"\u003eMSA GMB cartridge\u003c\/a\u003e covers this class.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMercury vapor:\u003c\/strong\u003e Mercury requires a separate Mersorb sorbent — see the \u003ca href=\"\/products\/msa-mersorb-p100-mercury-vapor-cartridge\" style=\"color:#4fc3f7;\"\u003eMSA Mersorb\/P100\u003c\/a\u003e.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAmmonia and methylamine:\u003c\/strong\u003e The \u003ca href=\"\/products\/msa-gmd-ammonia-methylamine-cartridge\" style=\"color:#4fc3f7;\"\u003eMSA GMD cartridge\u003c\/a\u003e is required for these bases.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCarbon monoxide, hydrogen sulfide:\u003c\/strong\u003e These require supplied-air (SCBA) or specific canister chemistries not present in the GMI.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGases below the minimum detectable odor threshold in oxygen-deficient atmospheres:\u003c\/strong\u003e Air-purifying respirators cannot warn the wearer of hazardous concentrations in low-oxygen conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv style=\"border:2px solid #ff9800;background:#2a1a00;border-radius:6px;padding:14px 18px;margin:16px 0;color:#ffb74d;\"\u003e\n  \u003cstrong\u003eSafety Notice:\u003c\/strong\u003e The MSA GMI is an air-purifying respirator cartridge. It does \u003cem\u003enot\u003c\/em\u003e supply oxygen and must \u003cstrong\u003enever\u003c\/strong\u003e be used in oxygen-deficient atmospheres (below 19.5% O\u003csub\u003e2\u003c\/sub\u003e), IDLH (immediately dangerous to life or health) concentrations, or any environment where contaminant concentration or oxygen level cannot be reliably determined. A self-contained breathing apparatus (SCBA) or supplied-air respirator is required in those conditions.\n\u003c\/div\u003e\n\n\u003c!-- 6. BEST APPLICATIONS --\u003e\n\u003ch2 style=\"color:#ff9800;\"\u003eBest Applications for the MSA GMI Cartridge\u003c\/h2\u003e\n\n\u003ch3 style=\"color:#ffb74d;\"\u003eNuclear Medicine and Radiopharmacy\u003c\/h3\u003e\n\u003cp style=\"color:#e0e0e0;\"\u003eNuclear medicine technologists who handle I-131 (sodium iodide) capsules, solutions, or dose-preparation procedures are the core user for this cartridge. Methyl iodide off-gassing during vial opening is the primary inhalation pathway, and the GMI's impregnated-carbon sorbent is specifically rated for CH\u003csub\u003e3\u003c\/sub\u003eI capture. Pair with a full-face \u003ca href=\"\/collections\/msa-full-face-mask-respirator\" style=\"color:#4fc3f7;\"\u003eMSA Comfo respirator\u003c\/a\u003e when splash risk also exists. Consult your radiation safety officer for site-specific cartridge-change schedules based on I-131 activity levels.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d;\"\u003eNuclear Power Plant Maintenance\u003c\/h3\u003e\n\u003cp style=\"color:#e0e0e0;\"\u003eReactor coolant system maintenance, fuel-handling operations, and containment entries in BWR\/PWR plants can produce radioactive iodine in the off-gas stream. The GMI's dual iodine\/P100 rating supports respiratory protection programs where both vapor and particulate radioiodine are present. Nuclear utility safety programs frequently specify bayonet-compatible Comfo respirators as plant-issued equipment, making the GMI a direct drop-in for existing facepiece inventories.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d;\"\u003eIsotope Production Laboratories\u003c\/h3\u003e\n\u003cp style=\"color:#e0e0e0;\"\u003eCommercial isotope production facilities and university research reactors that produce, handle, or ship radioactive iodine compounds need a cartridge rated for both elemental and organic iodine forms. The GMI's NIOSH approval specifically covers both I\u003csub\u003e2\u003c\/sub\u003e and CH\u003csub\u003e3\u003c\/sub\u003eI, making it suitable for hot-cell and fume-hood work where volatile iodine species may be present. See the \u003ca href=\"\/blogs\/guides\/respirator-filter-types-explained\" style=\"color:#4fc3f7;\"\u003efilter types guide\u003c\/a\u003e for a breakdown of how sorbent cartridge chemistries differ from standard OV carbons.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d;\"\u003eIndustrial Iodine Chemical Manufacturing\u003c\/h3\u003e\n\u003cp style=\"color:#e0e0e0;\"\u003eNon-radioactive iodine vapor is also a significant inhalation hazard in pharmaceutical API synthesis, iodine-based disinfectant manufacturing, and photographic chemical production. The GMI protects against non-radioactive iodine with the same NIOSH-approved sorbent chemistry as for radioactive iodine — making it the correct choice in these industrial settings as well. Consult the \u003ca href=\"\/blogs\/guides\/how-to-choose-a-respirator-cartridge\" style=\"color:#4fc3f7;\"\u003ecartridge selection guide\u003c\/a\u003e to confirm the GMI is appropriate for your specific process concentrations and exposure limits.\u003c\/p\u003e\n\n\u003c!-- 7. PROS \/ CONS --\u003e\n\u003ch2 style=\"color:#ff9800;\"\u003ePros and Cons\u003c\/h2\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;background:#1a1a1a;color:#e0e0e0;margin:16px 0;\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth style=\"border:1px solid #444;padding:10px;color:#ffb74d;text-align:left;width:50%;\"\u003ePros\u003c\/th\u003e\n      \u003cth style=\"border:1px solid #444;padding:10px;color:#ffb74d;text-align:left;width:50%;\"\u003eCons\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;vertical-align:top;\"\u003e\n        \u003cul style=\"margin:0;padding-left:18px;\"\u003e\n          \u003cli\u003eNIOSH-approved for both elemental iodine (I\u003csub\u003e2\u003c\/sub\u003e) and methyl iodide (CH\u003csub\u003e3\u003c\/sub\u003eI)\u003c\/li\u003e\n          \u003cli\u003eIntegrated P100 layer — no separate particulate filter needed\u003c\/li\u003e\n          \u003cli\u003ePurpose-built chemistry (impregnated activated carbon) vs. repurposed OV carbon\u003c\/li\u003e\n          \u003cli\u003eBayonet mount fits all MSA Comfo-platform respirators — full-face and half-mask\u003c\/li\u003e\n          \u003cli\u003eSold in a 6-pack, standard for institutional procurement and site safety programs\u003c\/li\u003e\n          \u003cli\u003eOne of very few commercial cartridges with explicit methyl iodide NIOSH rating\u003c\/li\u003e\n        \u003c\/ul\u003e\n      \u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;vertical-align:top;\"\u003e\n        \u003cul style=\"margin:0;padding-left:18px;\"\u003e\n          \u003cli\u003eHigh per-cartridge cost ($30.93) compared to general OV or P100-only cartridges\u003c\/li\u003e\n          \u003cli\u003eNarrow hazard scope — no OV, acid gas, mercury, or ammonia protection\u003c\/li\u003e\n          \u003cli\u003eBayonet-only — incompatible with MSA Advantage snap-on or 3M bayonet systems\u003c\/li\u003e\n          \u003cli\u003eSpecialty application limits off-the-shelf availability at general safety distributors\u003c\/li\u003e\n          \u003cli\u003eChange-out intervals in radioactive environments require health physics oversight, not standard odor-warning methods\u003c\/li\u003e\n        \u003c\/ul\u003e\n      \u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003c!-- 8. COMPATIBLE MSA RESPIRATORS --\u003e\n\u003ch2 style=\"color:#ff9800;\"\u003eCompatible MSA Respirators\u003c\/h2\u003e\n\u003cp style=\"color:#e0e0e0;\"\u003eThe GMI uses the MSA Comfo-series threaded bayonet mount. It is \u003cstrong\u003enot\u003c\/strong\u003e compatible with MSA Advantage snap-on ports or any other manufacturer's bayonet standard.\u003c\/p\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;background:#1a1a1a;color:#e0e0e0;margin:16px 0;\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth style=\"border:1px solid #444;padding:10px;color:#ffb74d;text-align:left;\"\u003eRespirator\u003c\/th\u003e\n      \u003cth style=\"border:1px solid #444;padding:10px;color:#ffb74d;text-align:left;\"\u003eSeries\u003c\/th\u003e\n      \u003cth style=\"border:1px solid #444;padding:10px;color:#ffb74d;text-align:left;\"\u003eCompatible?\u003c\/th\u003e\n      \u003cth style=\"border:1px solid #444;padding:10px;color:#ffb74d;text-align:left;\"\u003eNotes\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eMSA Ultra-Elite Full-Face\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eComfo Platform\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;color:#4caf50;\"\u003e\u003cstrong\u003eYes\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eThreaded bayonet — dual cartridge mount; full-face seal for highest protection factor\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eMSA Ultra-Twin Full-Face\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eComfo Platform\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;color:#4caf50;\"\u003e\u003cstrong\u003eYes\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eDual bayonet ports; uses 2 × GMI cartridges per mask\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eMSA Comfo Classic Half-Mask\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eComfo Platform\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;color:#4caf50;\"\u003e\u003cstrong\u003eYes\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eStandard bayonet; dual cartridge mount\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eMSA Comfo II Half-Mask\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eComfo Platform\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;color:#4caf50;\"\u003e\u003cstrong\u003eYes\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eStandard bayonet; dual cartridge mount\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eMSA Advantage 200 LS Half-Mask\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eAdvantage Platform\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;color:#f44336;\"\u003e\u003cstrong\u003eNo\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eSnap-on filter port — does not accept bayonet cartridges\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eMSA Advantage 290 \/ 420 Half-Mask\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eAdvantage Platform\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;color:#f44336;\"\u003e\u003cstrong\u003eNo\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eSnap-on filter port — bayonet cartridges will not attach\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eMSA Advantage 1000 Full-Face\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eAdvantage Platform\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;color:#f44336;\"\u003e\u003cstrong\u003eNo\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eSnap-on filter port — incompatible with GMI bayonet thread\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003e3M Half-Mask or Full-Face Respirators\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003e3M Bayonet (different standard)\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;color:#f44336;\"\u003e\u003cstrong\u003eNo\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003e3M uses a different bayonet thread — cross-brand mounting is not permitted\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp style=\"color:#e0e0e0;\"\u003eIf you need an \u003ca href=\"\/collections\/msa-full-face-mask-respirator\" style=\"color:#4fc3f7;\"\u003eMSA full-face respirator\u003c\/a\u003e to pair with the GMI, see the full collection. For half-mask options on the Comfo platform, browse \u003ca href=\"\/collections\/msa-half-mask-respirator\" style=\"color:#4fc3f7;\"\u003eMSA half-mask respirators\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003c!-- 9. GMI vs OTHER MSA COMFO FILTERS — IN-FAMILY COMPARISON --\u003e\n\u003ch2 style=\"color:#ff9800;\"\u003eMSA GMI vs Other MSA Comfo Cartridges\u003c\/h2\u003e\n\u003cp style=\"color:#e0e0e0;\"\u003eAll cartridges below use the same MSA Comfo threaded bayonet mount. Select by hazard class, not by respirator fit.\u003c\/p\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;background:#1a1a1a;color:#e0e0e0;margin:16px 0;font-size:0.93em;\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth style=\"border:1px solid #444;padding:10px;color:#ffb74d;text-align:left;\"\u003eCartridge\u003c\/th\u003e\n      \u003cth style=\"border:1px solid #444;padding:10px;color:#ffb74d;text-align:left;\"\u003ePrimary Hazard\u003c\/th\u003e\n      \u003cth style=\"border:1px solid #444;padding:10px;color:#ffb74d;text-align:left;\"\u003eP100?\u003c\/th\u003e\n      \u003cth style=\"border:1px solid #444;padding:10px;color:#ffb74d;text-align:left;\"\u003eChoose If...\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr style=\"background:#252525;\"\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003e\u003cstrong\u003eGMI (this product)\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eIodine vapor (I\u003csub\u003e2\u003c\/sub\u003e + CH\u003csub\u003e3\u003c\/sub\u003eI)\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eYes\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eNuclear medicine, radiopharmacy, nuclear power, iodine chemical mfg.\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003e\u003ca href=\"\/products\/msa-gma-p100-organic-vapor-particulate-cartridge\" style=\"color:#4fc3f7;\"\u003eGMA\/P100\u003c\/a\u003e\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eOrganic vapor\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eYes\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eSolvents, coatings, pesticide application\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003e\u003ca href=\"\/products\/msa-gmb-p100-acid-gas-particulate-cartridge\" style=\"color:#4fc3f7;\"\u003eGMB\/P100\u003c\/a\u003e\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eAcid gases (Cl\u003csub\u003e2\u003c\/sub\u003e, HCl, SO\u003csub\u003e2\u003c\/sub\u003e)\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eYes\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eChlorine handling, acid plating, water treatment\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003e\u003ca href=\"\/products\/msa-gmc-p100-ov-acid-gas-particulate-cartridge\" style=\"color:#4fc3f7;\"\u003eGMC\/P100\u003c\/a\u003e\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eOV + Acid gas combo\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eYes\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eMixed chemical environments with both solvent and acid-gas hazards\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003e\u003ca href=\"\/products\/msa-gmd-p100-ammonia-particulate-cartridge\" style=\"color:#4fc3f7;\"\u003eGMD\/P100\u003c\/a\u003e\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eAmmonia \/ Methylamine\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eYes\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eCold-storage ammonia refrigerants, wastewater treatment\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003e\u003ca href=\"\/products\/msa-gme-p100-multigas-particulate-cartridge\" style=\"color:#4fc3f7;\"\u003eGME\/P100\u003c\/a\u003e\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eMulti-gas (OV + Acid gas + Ammonia)\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eYes\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eComplex mixed-gas environments where hazard class is uncertain or varied\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003e\u003ca href=\"\/products\/msa-mersorb-p100-mercury-vapor-cartridge\" style=\"color:#4fc3f7;\"\u003eMersorb\/P100\u003c\/a\u003e\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eMercury vapor\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eYes\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eDental amalgam, fluorescent lamp recycling, mercury-bearing process work\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003e\u003ca href=\"\/products\/msa-low-profile-p100-particulate-filter\" style=\"color:#4fc3f7;\"\u003eLow-Profile P100\u003c\/a\u003e\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eParticulate only\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eYes\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eDust\/mist\/fume with no gas-phase hazard\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003c!-- 10. 1:1 COMPARISONS --\u003e\n\u003ch2 style=\"color:#ff9800;\"\u003eMSA GMI vs MSA GME\/P100 — Which Multi-Hazard Option Is Right?\u003c\/h2\u003e\n\u003cp style=\"color:#e0e0e0;\"\u003eThe \u003ca href=\"\/products\/msa-gme-p100-multigas-particulate-cartridge\" style=\"color:#4fc3f7;\"\u003eMSA GME\/P100 multi-gas cartridge\u003c\/a\u003e is the most common alternative buyers compare to the GMI when they work in environments with uncertain or mixed chemical hazards.\u003c\/p\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;background:#1a1a1a;color:#e0e0e0;margin:16px 0;\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth style=\"border:1px solid #444;padding:10px;color:#ffb74d;text-align:left;width:30%;\"\u003eFactor\u003c\/th\u003e\n      \u003cth style=\"border:1px solid #444;padding:10px;color:#ffb74d;text-align:left;width:35%;\"\u003eGMI Iodine\/P100\u003c\/th\u003e\n      \u003cth style=\"border:1px solid #444;padding:10px;color:#ffb74d;text-align:left;width:35%;\"\u003eGME\/P100 Multi-Gas\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003ePrimary hazard rating\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eIodine (I\u003csub\u003e2\u003c\/sub\u003e + CH\u003csub\u003e3\u003c\/sub\u003eI) + P100\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eOV + Acid gas + Ammonia + P100\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eCovers radioactive iodine?\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;color:#4caf50;\"\u003eYes — NIOSH rated\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;color:#f44336;\"\u003eNo\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eCovers organic vapors?\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;color:#f44336;\"\u003eNot rated for general OV\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;color:#4caf50;\"\u003eYes\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eCovers chlorine\/acid gases?\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;color:#f44336;\"\u003eNo\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;color:#4caf50;\"\u003eYes\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eApplication fit\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eNuclear medicine, radiopharmacy, nuclear power\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eGeneral industry, chemical manufacturing, mixed environments\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eCost per cartridge\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003e$30.93 (6-pack)\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eLower (general catalog pricing)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eChoose when...\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eIodine is the confirmed specific hazard\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eMultiple chemical classes present or hazard is uncertain\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2 style=\"color:#ff9800;\"\u003eMSA GMI vs MSA Mersorb\/P100 — Specialty Cartridge Comparison\u003c\/h2\u003e\n\u003cp style=\"color:#e0e0e0;\"\u003eBoth the GMI and the \u003ca href=\"\/products\/msa-mersorb-p100-mercury-vapor-cartridge\" style=\"color:#4fc3f7;\"\u003eMSA Mersorb\/P100 mercury cartridge\u003c\/a\u003e are specialty impregnated-carbon cartridges for hazards that standard OV carbon does not capture effectively. Workers sometimes ask about these two together when working in facilities that handle both iodine-based reagents and mercury-containing equipment.\u003c\/p\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;background:#1a1a1a;color:#e0e0e0;margin:16px 0;\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth style=\"border:1px solid #444;padding:10px;color:#ffb74d;text-align:left;width:30%;\"\u003eFactor\u003c\/th\u003e\n      \u003cth style=\"border:1px solid #444;padding:10px;color:#ffb74d;text-align:left;width:35%;\"\u003eGMI Iodine\/P100\u003c\/th\u003e\n      \u003cth style=\"border:1px solid #444;padding:10px;color:#ffb74d;text-align:left;width:35%;\"\u003eMersorb\/P100\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eSorbent chemistry\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eReagent-impregnated carbon for iodine species\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eMersorb (sulfur-impregnated carbon) for mercury\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eCovers iodine vapor?\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;color:#4caf50;\"\u003eYes — NIOSH rated\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;color:#f44336;\"\u003eNo\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eCovers mercury vapor?\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;color:#f44336;\"\u003eNo\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;color:#4caf50;\"\u003eYes — NIOSH rated\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eNuclear medicine application\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;color:#4caf50;\"\u003ePrimary use case\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;color:#f44336;\"\u003eNot applicable\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eCan they be used on same respirator?\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\" colspan=\"2\"\u003eNo — each port accepts only one cartridge. If both hazards are present simultaneously, consult your IH about a combination approach or site controls.\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003c!-- 11. QUICK ANSWERS --\u003e\n\u003ch2 style=\"color:#ff9800;\"\u003eMSA GMI Quick Answers\u003c\/h2\u003e\n\n\u003ch3 style=\"color:#ffb74d;\"\u003eDoes the MSA GMI protect against radioactive iodine?\u003c\/h3\u003e\n\u003cp style=\"color:#e0e0e0;\"\u003eYes. The MSA GMI Iodine Vapor \/ P100 cartridge is NIOSH-approved for both radioactive and non-radioactive forms of iodine vapor, including elemental iodine (I\u003csub\u003e2\u003c\/sub\u003e) and methyl iodide (CH\u003csub\u003e3\u003c\/sub\u003eI). The activated carbon in the cartridge is impregnated with specific reagents that chemically react with and retain these iodine species rather than relying solely on physical adsorption. The integrated P100 layer additionally captures radioactive particulate aerosols at 99.97% efficiency.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d;\"\u003eWhat MSA respirators does the GMI cartridge fit?\u003c\/h3\u003e\n\u003cp style=\"color:#e0e0e0;\"\u003eThe GMI uses the MSA Comfo-series threaded bayonet mount and is compatible with all Comfo-platform respirators: the Ultra-Elite full-face, Ultra-Twin full-face, Comfo Classic half-mask, and Comfo II half-mask. It does \u003cem\u003enot\u003c\/em\u003e fit MSA Advantage-series respirators (200, 290, 420, 1000), which use a snap-on filter attachment, or any 3M respirator.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d;\"\u003eHow many cartridges come in a box and what is the per-unit cost?\u003c\/h3\u003e\n\u003cp style=\"color:#e0e0e0;\"\u003eThe MSA GMI is sold in a box of 6 cartridges at $185.56, which works out to $30.93 per cartridge. Most nuclear safety programs procure by the box to ensure availability for scheduled change-outs and minimize purchasing events.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d;\"\u003eIs the GMI the same as a standard organic vapor cartridge?\u003c\/h3\u003e\n\u003cp style=\"color:#e0e0e0;\"\u003eNo. Standard organic vapor cartridges (like the \u003ca href=\"\/products\/msa-gma-organic-vapor-cartridge\" style=\"color:#4fc3f7;\"\u003eMSA GMA\u003c\/a\u003e) use activated carbon that adsorbs organic molecules through physical surface attraction. The GMI uses a reagent-impregnated carbon that chemically reacts with iodine species — a completely different mechanism. Using a standard OV cartridge in an iodine environment is not NIOSH-compliant and may provide inadequate protection for I\u003csub\u003e2\u003c\/sub\u003e and CH\u003csub\u003e3\u003c\/sub\u003eI.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d;\"\u003eHow do I know when to change the MSA GMI cartridge?\u003c\/h3\u003e\n\u003cp style=\"color:#e0e0e0;\"\u003eChange-out schedules for the GMI in radioactive iodine environments cannot be determined by odor-threshold detection alone because the sorbent reacts chemically with iodine — you cannot rely on smell as a warning. In nuclear medicine and nuclear power applications, change-out intervals should be established by a qualified health physicist or industrial hygienist based on measured or estimated air concentrations, cartridge manufacturer capacity data, and regulatory requirements. End-of-service-life indicators (ESLI) are not present on the GMI; schedule-based replacement is the standard practice.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d;\"\u003eCan I use the MSA GMI for general-industry chemical exposures?\u003c\/h3\u003e\n\u003cp style=\"color:#e0e0e0;\"\u003eOnly if iodine vapor (I\u003csub\u003e2\u003c\/sub\u003e or CH\u003csub\u003e3\u003c\/sub\u003eI) is the confirmed primary hazard. The GMI is not rated for organic vapors, acid gases, ammonia, or mercury. If your workplace has multiple chemical hazards, the \u003ca href=\"\/products\/msa-gme-p100-multigas-particulate-cartridge\" style=\"color:#4fc3f7;\"\u003eMSA GME\/P100 multi-gas cartridge\u003c\/a\u003e may be a better fit — but confirm the correct selection with a \u003ca href=\"\/blogs\/guides\/how-to-choose-a-respirator-cartridge\" style=\"color:#4fc3f7;\"\u003ecartridge selection guide\u003c\/a\u003e or a qualified industrial hygienist.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d;\"\u003eWhat is the NIOSH part number and MSA part number for the GMI?\u003c\/h3\u003e\n\u003cp style=\"color:#e0e0e0;\"\u003eThe MSA part number is \u003cstrong\u003e815184\u003c\/strong\u003e. Buyers procuring against government or utility qualified product lists should confirm NIOSH approval number documentation with MSA Safety directly or through their authorized distributor, as NIOSH TC numbers for specialty cartridges are not published on retail product pages.\u003c\/p\u003e\n\n\u003c!-- 12. SPECIFICATIONS --\u003e\n\u003ch2 style=\"color:#ff9800;\"\u003eMSA GMI Iodine \/ P100 Cartridge Specifications\u003c\/h2\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;background:#1a1a1a;color:#e0e0e0;margin:16px 0;\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth style=\"border:1px solid #444;padding:10px;color:#ffb74d;text-align:left;width:40%;\"\u003eSpecification\u003c\/th\u003e\n      \u003cth style=\"border:1px solid #444;padding:10px;color:#ffb74d;text-align:left;width:60%;\"\u003eValue\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eMSA Part Number\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003e815184\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eGTIN \/ UPC\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003e0641817024829\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eHazard Class (Gas)\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eIodine vapor — elemental (I\u003csub\u003e2\u003c\/sub\u003e) and methyl iodide (CH\u003csub\u003e3\u003c\/sub\u003eI)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eParticulate Rating\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eP100 — 99.97% minimum filtration efficiency\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eApproval\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eNIOSH-approved\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eConnection Type\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eMSA Comfo-series threaded bayonet mount\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eCompatible Respirator Platforms\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eMSA Comfo (Ultra-Elite, Ultra-Twin, Comfo Classic, Comfo II)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003ePack Size\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003e6 cartridges per box\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003ePrice per Box\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003e$185.56\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003ePrice per Cartridge\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003e$30.93\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eSorbent Technology\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eActivated carbon impregnated with reagents specific to iodine species\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eESLI (End-of-Service-Life Indicator)\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eNot present — schedule-based change-out required\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eBrand\u003c\/td\u003e\n      \u003ctd style=\"border:1px solid #444;padding:10px;\"\u003eMSA Safety\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003c!-- 13. HELPFUL BUYING GUIDES --\u003e\n\u003ch2 style=\"color:#ff9800;\"\u003eHelpful Buying Guides\u003c\/h2\u003e\n\u003cul style=\"color:#e0e0e0;\"\u003e\n  \u003cli\u003e\u003ca href=\"\/blogs\/guides\/how-to-choose-a-respirator-cartridge\" style=\"color:#4fc3f7;\"\u003eHow to Choose a Respirator Cartridge — Complete Selection Guide\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/blogs\/guides\/respirator-filter-types-explained\" style=\"color:#4fc3f7;\"\u003eRespirator Filter Types Explained — P100, OV, Acid Gas, and Specialty\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/blogs\/guides\/organic-vapor-vs-p100\" style=\"color:#4fc3f7;\"\u003eOrganic Vapor vs P100 — When to Use Each Filter Type\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/blogs\/guides\/respirator-cartridge-color-chart\" style=\"color:#4fc3f7;\"\u003eRespirator Cartridge Color Chart — NIOSH Color-Code Reference\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/blogs\/guides\/best-respirator-for-silica-dust-2026\" style=\"color:#4fc3f7;\"\u003eBest Respirator for Silica Dust (2026 Guide)\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/blogs\/guides\/best-respirator-for-welding-fumes\" style=\"color:#4fc3f7;\"\u003eBest Respirator for Welding Fumes — Buyer's Guide\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/collections\/msa-respirator-filters-and-cartridges\" style=\"color:#4fc3f7;\"\u003eMSA Respirator Filters and Cartridges — Full Collection\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/collections\/3m-respirator-filters-and-cartridges\" style=\"color:#4fc3f7;\"\u003e3M Respirator Filters and Cartridges — Compare Brands\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- 14. FAQs --\u003e\n\u003ch2 style=\"color:#ff9800;\"\u003eMSA GMI Iodine \/ P100 Cartridge — Frequently Asked Questions\u003c\/h2\u003e\n\n\u003ch3 style=\"color:#ffb74d;\"\u003eCan the MSA GMI be used for iodine exposure in a non-nuclear industrial setting?\u003c\/h3\u003e\n\u003cp style=\"color:#e0e0e0;\"\u003eYes. The GMI is NIOSH-approved for non-radioactive iodine vapor as well as radioactive iodine. Workers in pharmaceutical API synthesis, iodine disinfectant production, photographic chemical manufacturing, and similar industries who face elemental iodine or methyl iodide exposure can use the GMI on MSA Comfo-platform respirators. Confirm that iodine is the primary gas-phase hazard and that concentrations are within NIOSH-rated limits for air-purifying respirator use.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d;\"\u003eDoes the GMI cartridge fit on a half-mask or does it require a full-face respirator?\u003c\/h3\u003e\n\u003cp style=\"color:#e0e0e0;\"\u003eThe GMI fits both half-mask and full-face respirators in the MSA Comfo platform. The Comfo Classic and Comfo II half-masks both accept the bayonet cartridge mount. Full-face models (Ultra-Elite, Ultra-Twin) also accept it and provide a higher assigned protection factor (APF 50 vs APF 10 for half-mask). For radioactive iodine applications, your radiation safety program may require the higher protection factor of a full-face respirator — consult your health physicist.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d;\"\u003eHow many GMI cartridges does one full-face MSA respirator use?\u003c\/h3\u003e\n\u003cp style=\"color:#e0e0e0;\"\u003eMSA full-face Comfo-platform respirators (Ultra-Elite, Ultra-Twin) use two cartridges simultaneously — one on each side of the facepiece. Half-mask Comfo respirators (Comfo Classic, Comfo II) also use two cartridges. A box of 6 cartridges therefore yields 3 complete cartridge sets (one change-out for three workers, or three change-outs for one worker).\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d;\"\u003eIs the MSA GMI available individually, or does it only come in a 6-pack?\u003c\/h3\u003e\n\u003cp style=\"color:#e0e0e0;\"\u003eThe standard retail and institutional packaging for the MSA GMI is a box of 6 cartridges (part 815184) at $185.56. Individual cartridges are not typically sold separately through safety distributors. The 6-pack format is aligned with institutional procurement cycles and ensures that replacement cartridges are available for full change-out sets without partial boxes.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d;\"\u003eCan the GMI be used in a nuclear power plant respirator protection program?\u003c\/h3\u003e\n\u003cp style=\"color:#e0e0e0;\"\u003eThe GMI is used in nuclear power plant maintenance and outage work where radioactive iodine inhalation is a documented hazard. However, nuclear utility respiratory protection programs are governed by 10 CFR 20 and site-specific radiation work permits. Whether the GMI is the correct cartridge for a specific plant task — versus an SCBA or supplied-air respirator — must be determined by a qualified health physicist based on air monitoring data and dose assessment. The GMI is a component of a broader radiological protection program, not a standalone solution.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d;\"\u003eWhat is the difference between the MSA GMI and the MSA GMA cartridge?\u003c\/h3\u003e\n\u003cp style=\"color:#e0e0e0;\"\u003eThe \u003ca href=\"\/products\/msa-gma-organic-vapor-cartridge\" style=\"color:#4fc3f7;\"\u003eMSA GMA\u003c\/a\u003e uses standard activated carbon rated for organic vapors such as solvents, fuels, and VOCs. The GMI uses activated carbon impregnated with reagents specifically formulated to chemically capture iodine species (I\u003csub\u003e2\u003c\/sub\u003e and CH\u003csub\u003e3\u003c\/sub\u003eI). These are different hazard ratings and are not interchangeable. Do not use a GMA cartridge in an iodine environment — it is not NIOSH-approved for that hazard class.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d;\"\u003eDoes the GMI cartridge have an expiration date?\u003c\/h3\u003e\n\u003cp style=\"color:#e0e0e0;\"\u003eYes — cartridges should be stored sealed in the original packaging and used before the manufacturer's stated shelf life. Impregnated carbon cartridges can lose sorbent capacity over time even when unopened if packaging is compromised. Once opened and put into service, change-out must be governed by a documented schedule based on exposure levels rather than by odor detection. Check the packaging label for the specific lot expiration date at time of receipt.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d;\"\u003eWhat happens if I use the wrong cartridge in an iodine environment?\u003c\/h3\u003e\n\u003cp style=\"color:#e0e0e0;\"\u003eUsing a standard OV cartridge (such as the GMA) or a P100-only filter in an iodine vapor environment means the gas-phase iodine passes through the filter medium and reaches the wearer's breathing zone. P100 filters capture particulate but have no gas-phase sorbent capacity. This is a serious safety failure mode, particularly in radiopharmacy and nuclear medicine where even sub-TLV I-131 inhalation carries radiological dose significance. Always verify the NIOSH hazard class rating on the cartridge packaging matches your confirmed workplace hazard.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d;\"\u003eDoes WC Safety offer bulk pricing on the MSA GMI for institutional orders?\u003c\/h3\u003e\n\u003cp style=\"color:#e0e0e0;\"\u003eWC Safety supplies safety programs for industrial and healthcare facilities. For large-volume or blanket-order pricing on the GMI (part 815184) or other \u003ca href=\"\/collections\/msa-respirator-filters-and-cartridges\" style=\"color:#4fc3f7;\"\u003eMSA Comfo cartridges\u003c\/a\u003e, contact the WC Safety team directly. Institutional buyers such as nuclear utilities, hospital radiation safety programs, and government labs often require annual supply contracts and traceability documentation.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d;\"\u003eIs the MSA GMI compatible with Moldex or 3M half-mask respirators?\u003c\/h3\u003e\n\u003cp style=\"color:#e0e0e0;\"\u003eNo. The GMI uses the MSA Comfo-series threaded bayonet mount, which is not interchangeable with 3M's bayonet standard or with Moldex's cartridge attachment system. If you use Moldex respirators, see \u003ca href=\"\/collections\/moldex-respirator-cartridges-and-filters\" style=\"color:#4fc3f7;\"\u003eMoldex cartridges and filters\u003c\/a\u003e. If you use 3M respirators, see \u003ca href=\"\/collections\/3m-respirator-filters-and-cartridges\" style=\"color:#4fc3f7;\"\u003e3M respirator filters and cartridges\u003c\/a\u003e. Cross-brand mounting is not permitted under NIOSH approval conditions.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d;\"\u003eCan I use the GMI in a confined space?\u003c\/h3\u003e\n\u003cp style=\"color:#e0e0e0;\"\u003eNo. The GMI is an air-purifying cartridge that cannot be used in oxygen-deficient atmospheres (below 19.5% O\u003csub\u003e2\u003c\/sub\u003e), permit-required confined spaces with unknown atmospheric conditions, or IDLH environments. A supplied-air respirator or SCBA is required for confined-space entry where the atmosphere has not been verified as safe for air-purifying respirator use. Consult OSHA 1910.134 and your site confined-space program.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d;\"\u003eWhere can I read a detailed review of the MSA GMI before purchasing?\u003c\/h3\u003e\n\u003cp style=\"color:#e0e0e0;\"\u003eThe WC Safety editorial team has published a full review of the MSA GMI Iodine \/ P100 cartridge covering performance specifications, application suitability, compatibility details, and how it compares to sibling cartridges in the Comfo lineup. Read the \u003ca href=\"\/blogs\/product-reviews\/msa-815184-gmi-iodine-p100-cartridge-review\" style=\"color:#ff9800;\"\u003efull MSA GMI product review\u003c\/a\u003e for a comprehensive pre-purchase assessment.\u003c\/p\u003e\n\n\u003c!-- Amazon CTA (post-FAQ) --\u003e\n\u003cdiv style=\"margin:24px 0;\"\u003e\n  \u003ca href=\"https:\/\/www.amazon.com\/dp\/B016N36FOC?tag=wcsafety04-20\" style=\"display:inline-block;background:#ff9800;color:#1a1a1a;padding:10px 20px;border-radius:4px;text-decoration:none;font-weight:bold;margin:4px 8px 4px 0;\"\u003eBuy on Amazon\u003c\/a\u003e\n  \u003ca href=\"\/products\/msa-gmi-iodine-p100-cartridge\" style=\"display:inline-block;background:#2a2520;color:#ff9800;border:2px solid #ff9800;padding:10px 20px;border-radius:4px;text-decoration:none;font-weight:bold;margin:4px 0;\"\u003eShop WC Safety\u003c\/a\u003e\n\u003c\/div\u003e\n\n\u003c!-- 15. FOOTER E-E-A-T TRUST STACK --\u003e\n\u003cdiv style=\"border-top:1px solid #444;margin-top:32px;padding-top:16px;font-size:0.85em;color:#aaa;\"\u003e\n  \u003cp\u003eWritten by \u003cstrong style=\"color:#ffb74d;\"\u003eSteven Eaton\u003c\/strong\u003e, WC Safety Editorial — industrial hygiene \u0026amp; PPE selection specialist. Reviewed by the WC Safety Editorial Team. | \u003ca href=\"\/collections\/msa-respirator-filters-and-cartridges\" style=\"color:#4fc3f7;\"\u003eMSA Respirator Filters \u0026amp; Cartridges\u003c\/a\u003e | \u003ca href=\"\/blogs\/guides\/how-to-choose-a-respirator-cartridge\" style=\"color:#4fc3f7;\"\u003eRespirator Selection Guide\u003c\/a\u003e\u003c\/p\u003e\n  \u003cp style=\"font-size:0.9em;\"\u003eManufacturer specifications sourced from MSA Safety published data. WC Safety is an authorized MSA Safety retailer. Always verify cartridge compatibility with your specific respirator model before use.\u003c\/p\u003e\n  \u003cp style=\"font-size:0.85em;color:#888;margin-top:8px;\"\u003e\u003cem\u003eWC Safety participates in the Amazon Associates program. Amazon links on this page are affiliate links — we may earn a commission at no added cost to you.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e\u003c!-- END .product-description-rich --\u003e","brand":"MSA Safety","offers":[{"title":"Default Title","offer_id":44064798638168,"sku":"815184","price":185.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0594\/1900\/0920\/files\/815184.jpg?v=1777874627","url":"https:\/\/wcsafety.com\/products\/msa-gmi-iodine-p100-cartridge","provider":"WC Safety","version":"1.0","type":"link"}