{"product_id":"moldex-7400-ammonia-methylamine-respirator-cartridge","title":"Moldex 7400 Ammonia\/Methylamine Respirator Cartridge","description":"\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=\"margin-bottom:12px;\"\u003e\u003cspan style=\"background:#ff9800;color:#1a1a1a;font-weight:bold;padding:4px 12px;border-radius:4px;font-size:0.95em;\"\u003eEDITORIAL REVIEW: 4.4\/5\u003c\/span\u003e\u003c\/div\u003e\n  \u003cp\u003e\u003cstrong\u003eBest For:\u003c\/strong\u003e Water treatment operators, refrigeration technicians, agricultural workers, and food-processing personnel who face ammonia or methylamine exposures at concentrations below the IDLH of 300 ppm (ammonia) or 100 ppm (methylamine). Ideal where particulate co-exposure is absent or where a separate P100 filter is already mounted upstream.\u003c\/p\u003e\n  \u003cp\u003e\u003cstrong\u003eNot For:\u003c\/strong\u003e Oxygen-deficient atmospheres (below 19.5% O₂), IDLH or immediately dangerous to life or health concentrations, organic vapor or acid gas hazards (wrong chemical class entirely), environments requiring SCBA or supplied-air respirator protection, or any atmosphere where contaminant identity is unknown. Also unsuitable if particulate protection is needed — step up to the \u003ca href=\"\/products\/moldex-7467-ammonia-methylamine-p100-combo-cartridge\" style=\"color:#4fc3f7\"\u003eMoldex 7467 AM+P100 combo\u003c\/a\u003e.\u003c\/p\u003e\n  \u003cp\u003e\u003cstrong\u003eBottom Line:\u003c\/strong\u003e The 7400 is the correct, task-specific choice for pure ammonia and methylamine vapor work — it provides reliable APF-10 protection at a fair pair price of $33.58, and if you also face particulate hazards the \u003ca href=\"\/products\/moldex-7467-ammonia-methylamine-p100-combo-cartridge\" style=\"color:#4fc3f7\"\u003eMoldex 7467\u003c\/a\u003e adds P100 filtration in a single set.\u003c\/p\u003e\n  \u003cp style=\"font-size:0.9em;color:#cbb89e;\"\u003eEditorial assessment by WC Safety. Scoring reflects manufacturer specifications, application fit, and compatibility — not laboratory testing.\u003c\/p\u003e\n  \u003cp style=\"margin-top:12px;\"\u003e\u003ca href=\"\/blogs\/product-reviews\/moldex-7400-ammonia-methylamine-respirator-cartridge-review\" title=\"Read our full Moldex 7400 review\" style=\"color:#4fc3f7;font-size:0.95em;text-decoration:underline;\"\u003eRead our full Moldex 7400 review →\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c!-- [1] OVERVIEW --\u003e\n\u003ch2 style=\"color:#ff9800\"\u003eMoldex 7400 Overview\u003c\/h2\u003e\n\u003cp\u003eThe Moldex 7400 is a NIOSH-approved ammonia and methylamine (AM) vapor cartridge sold as a pair that threads directly onto Moldex 7000, 7800, and 9000 series respirators. Each cartridge uses a specialized adsorbent formulation chosen specifically for low-molecular-weight amines — a chemical class that standard organic vapor or acid gas media will not capture at rated efficiency. At $33.58 per pair, the 7400 is the go-to replacement cartridge for facilities dealing with anhydrous ammonia, aqueous ammonia solutions, or methylamine in water treatment, refrigeration, agriculture, and food processing.\u003c\/p\u003e\n\n\u003cdiv style=\"display:flex;gap:12px;flex-wrap:wrap;margin:16px 0;\"\u003e\n  \u003ca href=\"\/collections\/moldex-respirator-cartridges-and-filters\" style=\"background:#ff9800;color:#1a1a1a;padding:10px 20px;border-radius:4px;font-weight:bold;text-decoration:none;\"\u003eShop Moldex Cartridges\u003c\/a\u003e\n  \u003ca href=\"https:\/\/www.amazon.com\/dp\/B004RIAACO?tag=wcsafety04-20\" style=\"background:#FF9900;color:#1a1a1a;padding:10px 20px;border-radius:4px;font-weight:bold;text-decoration:none;\" rel=\"nofollow sponsored\"\u003eBuy on Amazon →\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-size:0.8em;color:#888;font-style:italic;\"\u003eAffiliate disclosure: WC Safety earns a commission on qualifying Amazon purchases at no extra cost to you.\u003c\/p\u003e\n\n\u003c!-- [2] WHERE IT FITS IN RESPIRATOR SELECTION --\u003e\n\u003ch2 style=\"color:#ff9800\"\u003eWhere the Moldex 7400 Fits in Respirator Selection\u003c\/h2\u003e\n\u003cp\u003eAmmonia is a basic, reactive gas — its chemistry is incompatible with the activated carbon media used in standard \u003ca href=\"\/products\/moldex-7100-organic-vapor-cartridge\" style=\"color:#4fc3f7\"\u003eorganic vapor cartridges like the 7100\u003c\/a\u003e or \u003ca href=\"\/products\/moldex-7200-acid-gas-respirator-cartridge\" style=\"color:#4fc3f7\"\u003eacid gas cartridges like the 7200\u003c\/a\u003e. NIOSH assigns ammonia its own cartridge designation (AM) precisely because a worker who grabs the wrong color-coded cartridge receives no protection against ammonia. The 7400 fills that gap with a sorbent bed matched to amine chemistry.\u003c\/p\u003e\n\u003cp\u003eUnder OSHA 29 CFR 1910.134, cartridge-type air-purifying respirators (APRs) carry an assigned protection factor (APF) of 10 for half-mask configurations, meaning they may be used up to 10× the occupational exposure limit (OEL) for a contaminant — not into immediately dangerous or IDLH concentrations. If your industrial hygienist has determined that ammonia concentrations remain below the IDLH of 300 ppm and below 10× the OSHA PEL (500 ppm ceiling), the 7400 on a \u003ca href=\"\/products\/moldex-7000-series-half-mask-respirator-7001-7002-7003\" style=\"color:#4fc3f7\"\u003eMoldex 7000 series half-mask\u003c\/a\u003e is a code-compliant, practical solution.\u003c\/p\u003e\n\u003cp\u003eFor a broader understanding of how cartridge classes are selected and what each color code means, the \u003ca href=\"\/blogs\/guides\/best-3m-respirator-cartridges\" style=\"color:#4fc3f7\"\u003erespirator cartridge selection guide\u003c\/a\u003e and the \u003ca href=\"\/blogs\/guides\/respirator-cartridge-esli-guide\" style=\"color:#4fc3f7\"\u003eESLI and change-schedule guide\u003c\/a\u003e cover the full decision framework in detail. Workers who also face particulate hazards — common in grain handling or fertilizer facilities — should review whether a combination cartridge is more appropriate; the \u003ca href=\"\/blogs\/guides\/nuisance-relief-vs-rated-respirator-protection\" style=\"color:#4fc3f7\"\u003enuisance relief vs. rated protection guide\u003c\/a\u003e explains that distinction. For facilities evaluating \u003ca href=\"\/blogs\/guides\/3m-vs-honeywell-north-respirator-cartridges\" style=\"color:#4fc3f7\"\u003ecross-brand cartridge options\u003c\/a\u003e, comparable AM cartridges exist in the 3M and Honeywell North families, but they are not interchangeable with Moldex hardware.\u003c\/p\u003e\n\n\u003c!-- [3] WHO SHOULD BUY --\u003e\n\u003ch2 style=\"color:#ff9800\"\u003eWho Should Buy the Moldex 7400?\u003c\/h2\u003e\n\u003cdiv style=\"background:#2a2520;border-radius:8px;padding:20px 24px;margin:0 0 24px 0\"\u003e\n  \u003ch3 style=\"color:#ffb74d\"\u003eBuy the Moldex 7400 if you:\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eAlready own a \u003ca href=\"\/products\/moldex-7000-series-half-mask-respirator-7001-7002-7003\" style=\"color:#4fc3f7\"\u003eMoldex 7000 series half-mask\u003c\/a\u003e or \u003ca href=\"\/products\/moldex-9000-series-full-face-respirator-9001-9002-9003\" style=\"color:#4fc3f7\"\u003eMoldex 9000 series full-face respirator\u003c\/a\u003e and need AM replacement cartridges\u003c\/li\u003e\n    \u003cli\u003eWork in water treatment, refrigeration plant maintenance, aquaculture, poultry processing, or agricultural chemical handling where ammonia is the primary airborne hazard\u003c\/li\u003e\n    \u003cli\u003eNeed a dedicated AM-only cartridge and your particulate exposure is controlled by other means (ventilation, wet methods, upstream P100 filters already in the system)\u003c\/li\u003e\n    \u003cli\u003eWant the lowest-cost entry point for Moldex AM protection — the \u003ca href=\"\/products\/moldex-7407-ammonia-methylamine-respirator-cartridge\" style=\"color:#4fc3f7\"\u003e7407 single cartridge at $4.00\u003c\/a\u003e is even cheaper per unit if you need to stock one side\u003c\/li\u003e\n    \u003cli\u003ePrefer buying in pairs to maintain a matched replacement set for a full half-mask\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3 style=\"color:#ffb74d\"\u003eDo NOT buy the Moldex 7400 if you:\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eFace ammonia \u003cem\u003eand\u003c\/em\u003e significant particulate exposure simultaneously — the \u003ca href=\"\/products\/moldex-7467-ammonia-methylamine-p100-combo-cartridge\" style=\"color:#4fc3f7\"\u003eMoldex 7467 AM+P100 combo\u003c\/a\u003e at $14.80\/set addresses both hazards in a single cartridge\u003c\/li\u003e\n    \u003cli\u003eNeed organic vapor or acid gas protection — use the \u003ca href=\"\/products\/moldex-7100-organic-vapor-cartridge\" style=\"color:#4fc3f7\"\u003e7100 OV pair\u003c\/a\u003e or \u003ca href=\"\/products\/moldex-7300-organic-vapor-acid-cartridge\" style=\"color:#4fc3f7\"\u003e7300 OV+AG pair\u003c\/a\u003e instead\u003c\/li\u003e\n    \u003cli\u003eNeed multi-gas coverage across OV, AG, and AM simultaneously — the \u003ca href=\"\/products\/moldex-7600-multi-gas-vapor-smart-cartridges\" style=\"color:#4fc3f7\"\u003e7600 Multi-Gas Smart ESLI pair\u003c\/a\u003e covers a broader contaminant spectrum\u003c\/li\u003e\n    \u003cli\u003eAre working in oxygen-deficient spaces or above IDLH concentrations — APR cartridges are prohibited; SCBA or supplied-air is required\u003c\/li\u003e\n    \u003cli\u003eUse a non-Moldex respirator body — the 7400 bayonet fitting is Moldex-specific and will not seat correctly on 3M, Honeywell North, MSA, or other brand facepieces\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003c!-- [4] WHAT DOES IT PROTECT AGAINST --\u003e\n\u003ch2 style=\"color:#ff9800\"\u003eWhat Does the Moldex 7400 Protect Against?\u003c\/h2\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;background:#1a1a1a;color:#e0e0e0\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth style=\"color:#ffb74d;padding:8px;text-align:left;border-bottom:1px solid #333\"\u003eHazard\u003c\/th\u003e\n      \u003cth style=\"color:#ffb74d;padding:8px;text-align:left;border-bottom:1px solid #333\"\u003eProtection Level\u003c\/th\u003e\n      \u003cth style=\"color:#ffb74d;padding:8px;text-align:left;border-bottom:1px solid #333\"\u003eBuyer Guidance\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eAmmonia vapor (NH₃)\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eNIOSH AM — APF 10 on half-mask\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003ePrimary use case; rated for concentrations below IDLH (300 ppm)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eMethylamine vapor (CH₃NH₂)\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eNIOSH AM — APF 10 on half-mask\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eCo-listed hazard; relevant in chemical synthesis and certain food processing environments\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eAmmonia-based cleaning agents (dilute aqueous)\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eIncidental vapor capture\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eSuitable for routine sanitation tasks; confirm concentration stays well below OEL\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eAnhydrous ammonia releases (leak response, non-IDLH)\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eAPF 10; half-mask limit applies\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eOnly appropriate if concentration has been measured and confirmed below IDLH; escape-only contexts may qualify\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 — safety callout appears ONCE ONLY --\u003e\n\u003ch2 style=\"color:#ff9800\"\u003eWhat the Moldex 7400 Does NOT Protect Against\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOrganic vapors\u003c\/strong\u003e (solvents, paint fumes, gasoline vapors) — requires an OV-rated cartridge such as the \u003ca href=\"\/products\/moldex-7100-organic-vapor-cartridge\" style=\"color:#4fc3f7\"\u003eMoldex 7100\u003c\/a\u003e\n\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAcid gases\u003c\/strong\u003e (chlorine, hydrogen chloride, sulfur dioxide) — requires an AG-rated cartridge such as the \u003ca href=\"\/products\/moldex-7200-acid-gas-respirator-cartridge\" style=\"color:#4fc3f7\"\u003eMoldex 7200\u003c\/a\u003e\n\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCombined OV + AG hazards\u003c\/strong\u003e — requires the \u003ca href=\"\/products\/moldex-7300-organic-vapor-acid-cartridge\" style=\"color:#4fc3f7\"\u003eMoldex 7300\u003c\/a\u003e\n\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eParticulates\u003c\/strong\u003e (dust, mist, fumes, biological aerosols) — no filter media; step up to the \u003ca href=\"\/products\/moldex-7467-ammonia-methylamine-p100-combo-cartridge\" style=\"color:#4fc3f7\"\u003e7467 AM+P100 combo\u003c\/a\u003e\n\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCarbon monoxide, hydrogen cyanide, or other gases outside the AM class\u003c\/strong\u003e — requires a cartridge specifically rated for those contaminants\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMulti-gas environments\u003c\/strong\u003e combining AM with OV, AG, or other vapors — use the \u003ca href=\"\/products\/moldex-7600-multi-gas-vapor-smart-cartridges\" style=\"color:#4fc3f7\"\u003eMoldex 7600 Multi-Gas Smart\u003c\/a\u003e cartridge\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv style=\"background:#3a1a1a;border-left:4px solid #ff5252;padding:16px 20px;border-radius:4px;margin:16px 0;\"\u003e\n  \u003cstrong style=\"color:#ff5252;\"\u003eCritical Safety Limitation — Read Before Use\u003c\/strong\u003e\n  \u003cp style=\"margin:8px 0 0 0;color:#f5e6d3;\"\u003eThe Moldex 7400, like all air-purifying respirator (APR) cartridges, requires a breathable atmosphere with at least 19.5% oxygen. It provides \u003cstrong\u003eno protection\u003c\/strong\u003e in oxygen-deficient spaces, confined spaces of unknown atmosphere, or environments at or above IDLH concentrations. In those conditions, a self-contained breathing apparatus (SCBA) or supplied-air respirator is required by law. Additionally, because the 7400 has no End-of-Service-Life Indicator (ESLI), OSHA 29 CFR 1910.134(d)(3)(iii) requires your facility to establish and follow a written cartridge change schedule based on objective information — such as a service-life calculation or industrial hygiene air sampling — before use.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c!-- [6] BEST APPLICATIONS --\u003e\n\u003ch2 style=\"color:#ff9800\"\u003eBest Applications for the Moldex 7400\u003c\/h2\u003e\n\n\u003ch3 style=\"color:#ffb74d\"\u003eWater Treatment and Wastewater Facilities\u003c\/h3\u003e\n\u003cp\u003eAmmonia is used as a disinfection aid in chloramination processes and is also a common byproduct of biological digestion. Operators working near dosing systems, chemical unloading points, or digesters benefit from the 7400 on a \u003ca href=\"\/products\/moldex-7000-series-half-mask-respirator-7001-7002-7003\" style=\"color:#4fc3f7\"\u003eMoldex 7000 half-mask\u003c\/a\u003e. Concentrations at properly ventilated municipal plants typically remain well below IDLH, making APR use code-compliant with a written change schedule in place.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d\"\u003eRefrigeration Plant Maintenance\u003c\/h3\u003e\n\u003cp\u003eIndustrial refrigeration systems — common in cold storage, ice cream production, and brewery cooling — use anhydrous ammonia (R-717) as the refrigerant. During valve work, coil inspections, or minor leak response, maintenance technicians need immediate access to a properly seated AM cartridge. The 7400 paired with the \u003ca href=\"\/products\/moldex-9000-series-full-face-respirator-9001-9002-9003\" style=\"color:#4fc3f7\"\u003eMoldex 9000 full-face respirator\u003c\/a\u003e provides both AM protection and eye\/face protection from ammonia's mucous-membrane irritancy. For facilities exploring their cartridge options more broadly, the \u003ca href=\"\/collections\/moldex-respirator-cartridges-and-filters\" style=\"color:#4fc3f7\"\u003efull Moldex cartridge collection\u003c\/a\u003e is worth reviewing before a scheduled maintenance shutdown.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d\"\u003eAgricultural Chemical Handling\u003c\/h3\u003e\n\u003cp\u003eLiquid anhydrous ammonia fertilizer application and storage presents high ammonia vapor risk. The 7400 is a standard replacement cartridge on farms and co-ops where a Moldex respirator is already in the PPE program. Workers handling nurse tanks, pull tanks, or nurse wagon fill operations should confirm via industrial hygiene sampling or service-life calculation that concentrations stay within APR limits before relying on this cartridge alone.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d\"\u003ePoultry and Food Processing\u003c\/h3\u003e\n\u003cp\u003ePoultry houses, fish processing plants, and fermentation facilities generate ammonia through biological decomposition. Cleaning crews using ammonia-based sanitizers also create inhalation hazards. The 7400 is appropriate for workers performing routine cleaning or entering areas with elevated but sub-IDLH ammonia readings. Facilities with simultaneous airborne organic particulate exposure — feathers, dust, aerosols — should evaluate the \u003ca href=\"\/products\/moldex-7467-ammonia-methylamine-p100-combo-cartridge\" style=\"color:#4fc3f7\"\u003e7467 AM+P100 combination cartridge\u003c\/a\u003e instead of stacking separate components.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d\"\u003eChemical Processing and Laboratory Settings\u003c\/h3\u003e\n\u003cp\u003eMethylamine is used in pharmaceutical synthesis, dye manufacturing, and as a solvent precursor. Workers who handle methylamine solutions, open drums, or clean up spills in well-ventilated laboratory or production settings can use the 7400 within its rated concentration limits. Lab managers selecting cartridges for multiple hazard types should consult the \u003ca href=\"\/blogs\/guides\/best-respirator-cartridge-for-mercury-vapor\" style=\"color:#4fc3f7\"\u003eguide to selecting respirator cartridges by contaminant class\u003c\/a\u003e to ensure the correct cartridge is stocked for each chemical handled on-site.\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\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth style=\"color:#ffb74d;padding:8px;text-align:left;border-bottom:1px solid #333;width:50%\"\u003ePros\u003c\/th\u003e\n      \u003cth style=\"color:#ffb74d;padding:8px;text-align:left;border-bottom:1px solid #333;width:50%\"\u003eCons\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eNIOSH-approved for ammonia and methylamine — correct chemical class, not a workaround\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eNo ESLI — written change schedule required by OSHA; no passive warning of saturation\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eBayonet tool-free attachment allows fast cartridge swaps in the field\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eProtects against AM only — any co-occurring OV, AG, or particulate hazard requires a different or combination cartridge\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eCompatible with both 7000-series half-mask and 9000-series full-face platforms\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eNot compatible with any non-Moldex respirator body — no cross-brand interchangeability\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eSold as a matched pair — correct quantity for a full half-mask replacement in one purchase\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003e$33.58\/pair is higher than OV-only alternatives — AM adsorbent media commands a price premium\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eColor-coded per NIOSH standard — reduces risk of grabbing the wrong cartridge in a multi-cartridge cabinet\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eAmmonia is detectable by odor near or below threshold limit value — odor fatigue can create false confidence; change schedule discipline is critical\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003c!-- [8] COMPATIBILITY --\u003e\n\u003ch2 style=\"color:#ff9800\"\u003eCompatible Moldex Respirators\u003c\/h2\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;background:#1a1a1a;color:#e0e0e0\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth style=\"color:#ffb74d;padding:8px;text-align:left;border-bottom:1px solid #333\"\u003eRespirator Model\u003c\/th\u003e\n      \u003cth style=\"color:#ffb74d;padding:8px;text-align:left;border-bottom:1px solid #333\"\u003eType\u003c\/th\u003e\n      \u003cth style=\"color:#ffb74d;padding:8px;text-align:left;border-bottom:1px solid #333\"\u003eCompatible?\u003c\/th\u003e\n      \u003cth style=\"color:#ffb74d;padding:8px;text-align:left;border-bottom:1px solid #333\"\u003eNotes\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003e\u003ca href=\"\/products\/moldex-7000-series-half-mask-respirator-7001-7002-7003\" style=\"color:#4fc3f7\"\u003eMoldex 7001 \/ 7002 \/ 7003\u003c\/a\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eHalf-mask (S \/ M \/ L)\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eYes\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003ePrimary recommended platform; bayonet connection; APF 10\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eMoldex 7800 series half-mask\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eHalf-mask\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eYes\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eSame bayonet interface as 7000 series; check Moldex current product listing for active 7800 SKUs\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003e\u003ca href=\"\/products\/moldex-9000-series-full-face-respirator-9001-9002-9003\" style=\"color:#4fc3f7\"\u003eMoldex 9001 \/ 9002 \/ 9003\u003c\/a\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eFull-face (S \/ M \/ L)\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eYes\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eRaises APF to 50; recommended when ammonia irritancy to eyes is a concern\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003e3M, Honeywell North, MSA, Scott, or any other brand\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eAny\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003e\u003cstrong\u003eNo\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eMoldex bayonet fitting is brand-specific; forcing the cartridge creates a face-seal leak — never attempt cross-brand mounting\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eThe Moldex 7400 does NOT fit any non-Moldex respirator.\u003c\/strong\u003e The bayonet connection interface used by Moldex is proprietary. If you use a 3M or Honeywell North facepiece, you need the AM cartridge from the corresponding brand family.\u003c\/p\u003e\n\n\u003c!-- [9] IN-FAMILY COMPARISON TABLE --\u003e\n\u003ch2 style=\"color:#ff9800\"\u003eMoldex 7400 vs Other Moldex Cartridges\u003c\/h2\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;background:#1a1a1a;color:#e0e0e0\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth style=\"color:#ffb74d;padding:8px;text-align:left;border-bottom:1px solid #333\"\u003eModel\u003c\/th\u003e\n      \u003cth style=\"color:#ffb74d;padding:8px;text-align:left;border-bottom:1px solid #333\"\u003eProtection Class\u003c\/th\u003e\n      \u003cth style=\"color:#ffb74d;padding:8px;text-align:left;border-bottom:1px solid #333\"\u003ePack\u003c\/th\u003e\n      \u003cth style=\"color:#ffb74d;padding:8px;text-align:left;border-bottom:1px solid #333\"\u003ePrice\u003c\/th\u003e\n      \u003cth style=\"color:#ffb74d;padding:8px;text-align:left;border-bottom:1px solid #333\"\u003eBest When\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003e\u003cstrong\u003e7400 (this item)\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eAM only\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003ePair\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003e$33.58\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003ePure ammonia\/methylamine exposure, no particulate co-hazard\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003e\u003ca href=\"\/products\/moldex-7407-ammonia-methylamine-respirator-cartridge\" style=\"color:#4fc3f7\"\u003e7407\u003c\/a\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eAM only\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eSingle\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003e$4.00\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eReplacing one side only; trial quantity; backup stock\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003e\u003ca href=\"\/products\/moldex-7467-ammonia-methylamine-p100-combo-cartridge\" style=\"color:#4fc3f7\"\u003e7467\u003c\/a\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eAM + P100\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eSet (2)\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003e$14.80\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eAmmonia AND particulate (dust, mist, fumes) present simultaneously\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003e\u003ca href=\"\/products\/moldex-7100-organic-vapor-cartridge\" style=\"color:#4fc3f7\"\u003e7100\u003c\/a\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eOV only\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003ePair\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003e$19.09\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eSolvent, paint, or petroleum vapor — NOT ammonia\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003e\u003ca href=\"\/products\/moldex-7300-organic-vapor-acid-cartridge\" style=\"color:#4fc3f7\"\u003e7300\u003c\/a\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eOV + AG\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003ePair\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003e$18.73\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eMixed OV and acid gas environments — NOT ammonia\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003e\u003ca href=\"\/products\/moldex-7600-multi-gas-vapor-smart-cartridges\" style=\"color:#4fc3f7\"\u003e7600\u003c\/a\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eMulti-Gas (OV\/AG\/AM) Smart ESLI\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003ePair\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003e$20.79\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eComplex mixed gas environments; ESLI desired; confirm AM coverage in current NIOSH approval\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003e\u003ca href=\"\/products\/moldex-7740-p100-particulate-filter-respirator\" style=\"color:#4fc3f7\"\u003e7740\u003c\/a\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eP100 particulate only\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003ePair\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003e$21.19\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eParticulate hazard only — no gas or vapor protection whatsoever\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003c!-- [10] HEAD-TO-HEAD COMPARISON --\u003e\n\u003ch2 style=\"color:#ff9800\"\u003eMoldex 7400 vs Moldex 7467: Which AM Cartridge Do You Need?\u003c\/h2\u003e\n\u003cdiv style=\"background:#2a2520;border-radius:8px;padding:20px 24px;margin:0 0 24px 0\"\u003e\n  \u003cp\u003eThe \u003ca href=\"\/products\/moldex-7467-ammonia-methylamine-p100-combo-cartridge\" style=\"color:#4fc3f7\"\u003eMoldex 7467 AM+P100 combo\u003c\/a\u003e at $14.80\/set is the most common upgrade path from the 7400. Both cartridges provide identical AM vapor protection on the same Moldex facepiece platforms. The 7467 adds a P100 particulate filter layer, which captures 99.97% of airborne particles.\u003c\/p\u003e\n  \u003ctable style=\"width:100%;border-collapse:collapse;background:#1a1a1a;color:#e0e0e0;margin-top:12px;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"color:#ffb74d;padding:8px;text-align:left;border-bottom:1px solid #333\"\u003eFactor\u003c\/th\u003e\n        \u003cth style=\"color:#ffb74d;padding:8px;text-align:left;border-bottom:1px solid #333\"\u003e7400 (AM pair)\u003c\/th\u003e\n        \u003cth style=\"color:#ffb74d;padding:8px;text-align:left;border-bottom:1px solid #333\"\u003e7467 (AM+P100 set)\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eAmmonia vapor protection\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eYes\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eYes\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eP100 particulate filtration\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eNo\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eYes — 99.97% efficiency\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003ePrice per set\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003e$33.58\/pair\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003e$14.80\/set\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eBreathing resistance\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eLower (vapor sorbent only)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eSlightly higher (adds filter media)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eIdeal environment\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eClean-air ammonia only\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eAmmonia + dust, mist, or fume co-exposure\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n  \u003cp style=\"margin-top:12px;\"\u003e\u003cstrong\u003eBuy verdict:\u003c\/strong\u003e If your hazard assessment confirms ammonia-only vapor with no meaningful particulate exposure, the 7400 is correct. If there is any particulate co-hazard — grain dust, mist from a scrubber, refrigeration oil aerosol — choose the \u003ca href=\"\/products\/moldex-7467-ammonia-methylamine-p100-combo-cartridge\" style=\"color:#4fc3f7\"\u003e7467\u003c\/a\u003e. At $14.80\/set the 7467 is actually cheaper per set than the 7400 pair while adding P100 coverage.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eAlso compare: the \u003ca href=\"\/products\/moldex-7407-ammonia-methylamine-respirator-cartridge\" style=\"color:#4fc3f7\"\u003eMoldex 7407 single cartridge at $4.00\u003c\/a\u003e is the single-unit version of this cartridge — useful when replacing just one side of a half-mask or stocking trial quantities.\u003c\/p\u003e\n\n\u003cdiv style=\"display:flex;gap:12px;flex-wrap:wrap;margin:16px 0;\"\u003e\n  \u003ca href=\"https:\/\/www.amazon.com\/dp\/B004RIAACO?tag=wcsafety04-20\" style=\"background:#FF9900;color:#1a1a1a;padding:10px 20px;border-radius:4px;font-weight:bold;text-decoration:none;\" rel=\"nofollow sponsored\"\u003eBuy Moldex 7400 on Amazon →\u003c\/a\u003e\n\u003c\/div\u003e\n\n\u003c!-- [11] QUICK ANSWERS --\u003e\n\u003ch2 style=\"color:#ff9800\"\u003eMoldex 7400 Quick Answers\u003c\/h2\u003e\n\n\u003ch3 style=\"color:#ffb74d\"\u003eWhat is the Moldex 7400 cartridge used for?\u003c\/h3\u003e\n\u003cp\u003eThe Moldex 7400 is used for protection against ammonia and methylamine vapors in workplaces including water treatment plants, refrigeration systems, agricultural chemical handling, poultry and food processing, and chemical manufacturing. It is a NIOSH AM-class cartridge sold as a pair for use on Moldex half-mask and full-face respirators.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d\"\u003eHow many cartridges are in a Moldex 7400 package?\u003c\/h3\u003e\n\u003cp\u003eTwo cartridges per package. The 7400 is sold as a pair, providing both left and right cartridges needed for a complete half-mask replacement. If you need a single cartridge, the \u003ca href=\"\/products\/moldex-7407-ammonia-methylamine-respirator-cartridge\" style=\"color:#4fc3f7\"\u003eMoldex 7407\u003c\/a\u003e is the individual-unit version at $4.00 each.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d\"\u003eIs the Moldex 7400 compatible with 3M respirators?\u003c\/h3\u003e\n\u003cp\u003eNo. The Moldex 7400 uses a Moldex-specific bayonet fitting and is compatible only with Moldex 7000, 7800, and 9000 series respirator facepieces. It will not mount correctly on 3M, Honeywell North, MSA, Scott, or any other manufacturer's facepiece. Cross-brand cartridge mounting creates a face-seal failure — never attempt it.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d\"\u003eDoes the Moldex 7400 protect against organic vapors like solvents?\u003c\/h3\u003e\n\u003cp\u003eNo. The 7400 is an AM (ammonia\/methylamine) cartridge. It does not protect against organic vapors, acid gases, particulates, or any other contaminant class outside the AM designation. For organic vapor protection, use the \u003ca href=\"\/products\/moldex-7100-organic-vapor-cartridge\" style=\"color:#4fc3f7\"\u003eMoldex 7100 OV cartridge\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d\"\u003eWhen should I change the Moldex 7400 cartridge?\u003c\/h3\u003e\n\u003cp\u003eThe 7400 has no End-of-Service-Life Indicator (ESLI). OSHA 29 CFR 1910.134 requires a written change schedule based on objective data — such as manufacturer service-life calculations, industrial hygiene air monitoring results, or published OSHA change-schedule worksheets — before the cartridge is put into service. Do not rely on ammonia odor as a change indicator; odor fatigue can cause workers to underestimate saturation.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d\"\u003eWhat is the difference between the Moldex 7400 and 7467?\u003c\/h3\u003e\n\u003cp\u003eThe 7400 provides ammonia and methylamine vapor protection only. The \u003ca href=\"\/products\/moldex-7467-ammonia-methylamine-p100-combo-cartridge\" style=\"color:#4fc3f7\"\u003e7467\u003c\/a\u003e adds P100 particulate filtration (99.97% efficiency) to the same AM vapor protection. Choose the 7467 when both ammonia vapor and airborne particulates — dust, mist, or fumes — are present simultaneously.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d\"\u003eDoes the Moldex 7400 work on the Moldex 9000 full-face respirator?\u003c\/h3\u003e\n\u003cp\u003eYes. The 7400 is compatible with both the \u003ca href=\"\/products\/moldex-7000-series-half-mask-respirator-7001-7002-7003\" style=\"color:#4fc3f7\"\u003eMoldex 7000 series half-mask\u003c\/a\u003e and the \u003ca href=\"\/products\/moldex-9000-series-full-face-respirator-9001-9002-9003\" style=\"color:#4fc3f7\"\u003eMoldex 9000 series full-face respirator\u003c\/a\u003e. Using it on a full-face platform raises the assigned protection factor from 10 (half-mask) to 50, and also provides eye and facial protection from ammonia irritancy.\u003c\/p\u003e\n\n\u003c!-- [12] SPECIFICATIONS --\u003e\n\u003ch2 style=\"color:#ff9800\"\u003eMoldex 7400 Specifications\u003c\/h2\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;background:#1a1a1a;color:#e0e0e0\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth style=\"color:#ffb74d;padding:8px;text-align:left;border-bottom:1px solid #333\"\u003eSpecification\u003c\/th\u003e\n      \u003cth style=\"color:#ffb74d;padding:8px;text-align:left;border-bottom:1px solid #333\"\u003eValue\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eManufacturer\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eMoldex-Metric, Inc.\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eModel Number\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003e7400\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eNIOSH Approval Class\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eAmmonia \/ Methylamine (AM)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003ePack Quantity\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003e2 cartridges (1 pair)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003ePrice (WC Safety)\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003e$33.58 per pair\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eConnection Type\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eMoldex bayonet (tool-free)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eCompatible Respirator Platforms\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eMoldex 7000, 7800, and 9000 series\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eEnd-of-Service-Life Indicator (ESLI)\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eNone — written change schedule required\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eAssigned Protection Factor (APF) — half-mask\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003e10\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eAssigned Protection Factor (APF) — full-face\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003e50\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eApplicable Standard\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eNIOSH 42 CFR Part 84; OSHA 29 CFR 1910.134\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eAmazon ASIN\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border-bottom:1px solid #2a2a2a\"\u003eB004RIAACO\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cdiv style=\"display:flex;gap:12px;flex-wrap:wrap;margin:16px 0;\"\u003e\n  \u003ca href=\"\/collections\/moldex-respirator-cartridges-and-filters\" style=\"background:#ff9800;color:#1a1a1a;padding:10px 20px;border-radius:4px;font-weight:bold;text-decoration:none;\"\u003eShop All Moldex Cartridges\u003c\/a\u003e\n  \u003ca href=\"https:\/\/www.amazon.com\/dp\/B004RIAACO?tag=wcsafety04-20\" style=\"background:#FF9900;color:#1a1a1a;padding:10px 20px;border-radius:4px;font-weight:bold;text-decoration:none;\" rel=\"nofollow sponsored\"\u003eBuy Moldex 7400 on Amazon →\u003c\/a\u003e\n\u003c\/div\u003e\n\n\u003c!-- [13] HELPFUL BUYING GUIDES --\u003e\n\u003ch2 style=\"color:#ff9800\"\u003eHelpful Buying Guides\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003ca href=\"\/blogs\/guides\/respirator-cartridge-esli-guide\" style=\"color:#4fc3f7\"\u003eHow to Use a Respirator Cartridge Change Schedule (ESLI Guide)\u003c\/a\u003e — when ESLI is absent, this guide explains how to build an OSHA-compliant written change schedule for cartridges like the 7400\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/blogs\/guides\/p95-vs-r95-vs-p100-filter-class-guide\" style=\"color:#4fc3f7\"\u003eP95 vs R95 vs P100 Filter Class Guide\u003c\/a\u003e — explains particulate filter ratings relevant to pairing P100 filters with AM cartridges on Moldex platforms\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/blogs\/guides\/nuisance-relief-vs-rated-respirator-protection\" style=\"color:#4fc3f7\"\u003eNuisance Relief vs Rated Respirator Protection\u003c\/a\u003e — critical reading before selecting any APR for a workplace hazard\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/blogs\/guides\/best-3m-respirator-cartridges\" style=\"color:#4fc3f7\"\u003eBest 3M Respirator Cartridges by Hazard Class\u003c\/a\u003e — useful cross-reference if evaluating 3M AM options alongside Moldex\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/blogs\/guides\/3m-vs-honeywell-north-respirator-cartridges\" style=\"color:#4fc3f7\"\u003e3M vs Honeywell North Respirator Cartridges Compared\u003c\/a\u003e — brand-vs-brand cartridge selection guide covering AM and other classes\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/blogs\/guides\/best-respirator-cartridge-for-mercury-vapor\" style=\"color:#4fc3f7\"\u003eBest Respirator Cartridge for Mercury Vapor\u003c\/a\u003e — useful companion when evaluating specialty-gas cartridge selection methodology\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- [14] FAQ --\u003e\n\u003ch2 style=\"color:#ff9800\"\u003eMoldex 7400 Frequently Asked Questions\u003c\/h2\u003e\n\n\u003ch3 style=\"color:#ffb74d\"\u003eIs the Moldex 7400 NIOSH-approved?\u003c\/h3\u003e\n\u003cp\u003eYes. The Moldex 7400 holds NIOSH approval under 42 CFR Part 84 for the ammonia and methylamine (AM) cartridge classification. NIOSH approval confirms that the cartridge meets minimum performance standards for AM vapor protection when used with a compatible, properly fitted respirator facepiece.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d\"\u003eCan I use the Moldex 7400 for ammonia refrigerant (R-717) exposure?\u003c\/h3\u003e\n\u003cp\u003eYes, within concentration limits. Anhydrous ammonia refrigerant (R-717) is chemically identical to industrial ammonia vapor, and the 7400 is rated to protect against it. Use is limited to concentrations below the IDLH (300 ppm) and within the APF of your respirator platform (APF 10 for half-mask; APF 50 for the \u003ca href=\"\/products\/moldex-9000-series-full-face-respirator-9001-9002-9003\" style=\"color:#4fc3f7\"\u003e9000 series full-face\u003c\/a\u003e). Consult your industrial hygienist to confirm compliance with your site-specific written respiratory protection program before use.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d\"\u003eHow do I know when to replace the Moldex 7400 cartridge?\u003c\/h3\u003e\n\u003cp\u003eBecause the 7400 lacks an ESLI, replacement timing must follow a written change schedule established under OSHA 29 CFR 1910.134(d)(3)(iii). Your safety officer should calculate or obtain service-life data from Moldex or use OSHA's change-schedule methodology based on measured ammonia concentrations, work duration, humidity, and temperature. The \u003ca href=\"\/blogs\/guides\/respirator-cartridge-esli-guide\" style=\"color:#4fc3f7\"\u003eESLI and change-schedule guide\u003c\/a\u003e walks through this process in detail.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d\"\u003eWhat respirator size should I order with the Moldex 7400?\u003c\/h3\u003e\n\u003cp\u003eCartridge size is independent of facepiece size — the 7400 pair fits all sizes of compatible Moldex facepieces. Order the facepiece in your fit-tested size (Small = 7001 \/ 9001, Medium = 7002 \/ 9002, Large = 7003 \/ 9003) and the 7400 will mount on any of them. Respirator fit testing is required by OSHA before use.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d\"\u003eCan I use the Moldex 7400 for hydrogen sulfide (H₂S) exposure?\u003c\/h3\u003e\n\u003cp\u003eNo. Hydrogen sulfide is not an ammonia or methylamine analog — it requires its own cartridge chemistry. The 7400 is not rated for H₂S and provides no protection against it. Facilities with combined ammonia and H₂S hazards (common in wastewater treatment) should consult a certified industrial hygienist and evaluate multi-gas cartridges that specifically list H₂S in their NIOSH approval.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d\"\u003eDoes the Moldex 7400 protect against ammonia AND particulates at the same time?\u003c\/h3\u003e\n\u003cp\u003eNo. The 7400 is a vapor-only cartridge with no particulate filter media. If your workplace exposure involves both ammonia vapor and airborne particulates — dust, mist, biological aerosols — you need the \u003ca href=\"\/products\/moldex-7467-ammonia-methylamine-p100-combo-cartridge\" style=\"color:#4fc3f7\"\u003eMoldex 7467 AM+P100 combination cartridge\u003c\/a\u003e, which integrates P100 filtration with the same AM vapor protection.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d\"\u003eCan I buy a single Moldex 7400 cartridge instead of a pair?\u003c\/h3\u003e\n\u003cp\u003eYes, through a different SKU. The \u003ca href=\"\/products\/moldex-7407-ammonia-methylamine-respirator-cartridge\" style=\"color:#4fc3f7\"\u003eMoldex 7407\u003c\/a\u003e is the individual-unit version of this cartridge at $4.00 each. Purchase the 7400 pair when replacing both cartridges on a half-mask simultaneously (which is the recommended practice); purchase the 7407 single when replacing only one side.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d\"\u003eIs the Moldex 7400 suitable for escape-only use in an ammonia emergency?\u003c\/h3\u003e\n\u003cp\u003eIt may be, with important caveats. The 7400 can support emergency escape in a non-IDLH ammonia atmosphere where the wearer is exiting toward clean air and the concentration remains within the APF of the facepiece. It is not appropriate for rescue, extended emergency response, or any IDLH or unknown concentration scenario — those require SCBA. Verify with your emergency response plan and respiratory protection program administrator before designating any APR for emergency escape use.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d\"\u003eHow does the Moldex 7400 compare to 3M's ammonia cartridge?\u003c\/h3\u003e\n\u003cp\u003eThe Moldex 7400 and 3M's AM-rated cartridges (such as the 3M 6004) perform the same NIOSH AM function — both are designed for ammonia and methylamine protection. The key difference is platform compatibility: Moldex cartridges mount only on Moldex facepieces, and 3M cartridges mount only on 3M facepieces. If you currently use a Moldex respirator, the 7400 is your correct choice. If you use a 3M respirator, you need the corresponding 3M AM cartridge. Mixing brands is not safe and not compliant.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d\"\u003eWhat is the shelf life of an unopened Moldex 7400 cartridge?\u003c\/h3\u003e\n\u003cp\u003eMoldex generally specifies a shelf life of five years from the manufacture date for sealed, unopened cartridges stored in original packaging at moderate temperature and humidity. Check the lot number and expiration markings on the packaging. Once opened and installed on a respirator, the service-life clock starts and must be governed by your written change schedule, not the sealed-package expiration date.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d\"\u003eDo I need a medical evaluation before using the Moldex 7400?\u003c\/h3\u003e\n\u003cp\u003eYes, if used in an occupational context under OSHA jurisdiction. OSHA 29 CFR 1910.134(e) requires employer-provided medical evaluation before an employee is required or permitted to use a respirator. The evaluation determines whether the employee is physically capable of using a negative-pressure APR such as a half-mask with the 7400 cartridge. Voluntary users in certain low-exposure contexts may be subject to a different standard — confirm with your safety officer.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#ffb74d\"\u003eWhy does the Moldex 7400 cost more than organic vapor cartridges?\u003c\/h3\u003e\n\u003cp\u003eAM adsorbent media for ammonia and methylamine requires different and typically more expensive sorbent materials than the activated carbon used in standard organic vapor cartridges. Because ammonia is alkaline and highly reactive, the sorbent bed must be chemically tailored to capture it efficiently. This specialized media drives a higher per-cartridge cost compared to the \u003ca href=\"\/products\/moldex-7100-organic-vapor-cartridge\" style=\"color:#4fc3f7\"\u003e7100 OV pair at $19.09\u003c\/a\u003e or the \u003ca href=\"\/products\/moldex-7300-organic-vapor-acid-cartridge\" style=\"color:#4fc3f7\"\u003e7300 OV+AG pair at $18.73\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003c!-- [15] FOOTER E-E-A-T --\u003e\n\u003cdiv style=\"border-top:1px solid #333;margin-top:32px;padding-top:16px;font-size:0.85em;color:#888;\"\u003e\n  \u003cp\u003eWritten by \u003cstrong\u003eSteven Eaton\u003c\/strong\u003e, WC Safety Editorial — Industrial hygiene \u0026amp; PPE specialist, 10+ years respiratory protection sourcing.\u003c\/p\u003e\n  \u003cp\u003eReviewed by the WC Safety Editorial Team. Last reviewed June 2026.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c!-- WCS-COMPARISON-LINKS --\u003e\n\u003cdiv style=\"background:#1a2733;border:1px solid #2a3f50;border-radius:4px;padding:20px 22px;margin:28px 0 0 0;\"\u003e\n\u003cp style=\"color:#4fc3f7;font-weight:bold;margin:0 0 10px 0;font-size:0.85em;text-transform:uppercase;letter-spacing:0.05em;\"\u003eWC Safety Comparison \u0026amp; Selection Guides\u003c\/p\u003e\n\u003cul style=\"margin:0;padding-left:18px;color:#e0e0e0;line-height:1.9em;\"\u003e\n\u003cli style=\"margin-bottom:6px;\"\u003e\u003ca href=\"\/blogs\/guides\/ov-vs-ov-ag-vs-multi-gas-cartridge-guide\" title=\"OV vs OV+AG vs Multi-Gas Selection Guide\" style=\"color:#4fc3f7;text-decoration:underline;\"\u003eOV vs OV+AG vs Multi-Gas Selection Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin-bottom:6px;\"\u003e\u003ca href=\"\/blogs\/guides\/moldex-7367-vs-7467-vs-7667-combo-cartridge-guide\" title=\"Moldex 7367 vs 7467 vs 7667 Combo Cartridge Guide\" style=\"color:#4fc3f7;text-decoration:underline;\"\u003eMoldex 7367 vs 7467 vs 7667 Combo Cartridge Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin-bottom:6px;\"\u003e\u003ca href=\"\/blogs\/guides\/esli-vs-written-change-schedule-respirator-guide\" title=\"ESLI vs Written Change Schedule Guide\" style=\"color:#4fc3f7;text-decoration:underline;\"\u003eESLI vs Written Change Schedule Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Moldex","offers":[{"title":"Default Title","offer_id":43925110947928,"sku":"Moldex 7400","price":33.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0594\/1900\/0920\/files\/81T4SwXjGkL.jpg?v=1774811538","url":"https:\/\/wcsafety.com\/products\/moldex-7400-ammonia-methylamine-respirator-cartridge","provider":"WC Safety","version":"1.0","type":"link"}