MSA GME P100 Cartridge Review: The Multigas Combination

Is the MSA 815182 GME-P100 the right multi-gas cartridge when both inorganic gases and particulates are in your hazard assessment?

Published June 10, 2026 · Last updated July 27, 2026

Short answer: Yes — when your documented hazards include two or more inorganic reactive gases and respirable particulates or aerosols simultaneously, the MSA 815182 GME-P100 is the correct single-cartridge answer on the MSA Comfo platform. It delivers the same nine-gas inorganic sorbent as the MSA 492790 GME with an integrated P100 filter (≥99.97% particulate efficiency) in one bayonet unit. The critical limitation to understand upfront: the GME-P100 contains no organic vapor sorbent — facilities with both VOC and inorganic gas exposure need a different selection. For pure inorganic gas environments without dust, the GME gas-only cartridge at a fraction of the cost is the better value. For nuclear/tritium applications, the MSA 806059 GMT adds tritium sorbent.

The MSA 815182 GME-P100 is the most protective standard-issue cartridge in MSA's Comfo-platform GM-series lineup for facilities dealing with mixed inorganic gas and particulate co-exposure. Sold in boxes of six at its listed price (its listed price per cartridge), it combines nine-gas inorganic sorbent chemistry — the same NIOSH-approved formulation as the MSA 492790 GME — with an integrated P100 particulate filter in a single bayonet-mount unit. This review covers where the 815182 is the correct specification, its most important limitation (no organic vapor coverage), how it compares against GM-series siblings and cross-brand competition including the 3M 60926, and the compatible Comfo-platform facepieces it serves.

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Editorial verdict — MSA 815182 GME-P100: 4.6/5
The MSA 815182 GME-P100 is the definitive Comfo-platform cartridge for mixed inorganic gas and particulate environments — nine NIOSH-approved gas chemistries plus integrated P100 filtration in one unit. The only significant limitation is the absence of organic vapor coverage: facilities with VOC co-exposure cannot use this cartridge as a complete solution. When the hazard profile is purely inorganic gas plus particulate, it is difficult to improve on the 815182 within the MSA ecosystem.

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Who the MSA 815182 GME-P100 is for

• Wastewater treatment operators in environments where ammonia off-gassing, hydrogen sulfide, chlorine disinfection, and biosolid aerosols or fine particulate are all simultaneously documented
• Water treatment plant workers exposed to chlorination gases and chloramine formation dust or chemical particulate
• Pulp-and-paper mill workers where process gases (ClO₂, SO₂, H₂S) co-exist with wood fiber dust, paper dust, or chemical particulate
• Chemical manufacturing workers handling inorganic acids, alkalis, and inorganic reactive gases in dusty processing environments
• Emergency responders working a characterised release where the chemistry is known and monitored — an atmosphere of unknown composition must be treated as IDLH, which rules out any air-purifying respirator
• Industrial hygiene programs seeking a single compliant cartridge specification for facilities where the documented hazard range is wide-spectrum inorganic gas plus particulate — a single SKU simplifies purchasing, inventory, and written program documentation

Not the right pick for: Organic vapor exposure, mercury vapor, radioiodine, carbon monoxide, or any application involving organic solvents. Browse the full MSA respirator filters and cartridges collection for OV, OV+AG, mercury, and specialty cartridge alternatives.

What the MSA 815182 GME-P100 does well

Complete dual-hazard coverage: nine inorganic gases plus P100 in one cartridge

The 815182 is NIOSH-approved under 42 CFR Part 84 against nine inorganic and reactive gas chemistries — chlorine (Cl₂), sulfur dioxide (SO₂), chlorine dioxide (ClO₂), hydrogen chloride (HCl), hydrogen sulfide (H₂S, escape only), ammonia (NH₃), methylamine (CH₃NH₂), formaldehyde (HCHO), and hydrogen fluoride (HF) — with an integrated P100 filter rated ≥99.97% efficient at 0.3 μm. This is the same nine-gas sorbent as the MSA 492790 GME; the 815182 adds the P100 layer without sacrificing any gas-phase coverage. For programs where both hazards are documented, a single GME-P100 cartridge satisfies the full NIOSH approval requirement — no stacking of separate filter discs, no second retainer assembly, no additional maintenance item.

Integrated P100 eliminates filter-stacking complexity and error risk

The alternative to the GME-P100 for combined gas + particulate protection is attaching a separate MSA Low Profile P100 filter disc to a gas-only GME cartridge. That approach requires correct filter selection, proper retainer assembly, and worker discipline to perform the stacking before every use. The GME-P100 eliminates all of this — the P100 layer is factory-integrated and cannot be omitted or incorrectly assembled. For large or multi-shift programs where consistent assembly is a practical challenge, the integrated cartridge architecture meaningfully reduces compliance risk.

Formaldehyde and HF coverage — critical for specific facility types

The nine-gas list includes two chemicals that require specific callout. Formaldehyde (HCHO) is an OSHA regulated substance under 29 CFR 1910.1048 and an IARC Group 1 carcinogen (confirmed human carcinogen) — correct cartridge selection for formaldehyde exposure is a compliance requirement, and the GME-P100 covers it. Hydrogen fluoride (HF) is among the most rapidly tissue-destructive industrial chemicals; it has a low immediately dangerous to life and health (IDLH) value of 30 ppm and can cause systemic toxicity at low vapor concentrations. The GME-P100's HF coverage is notable in semiconductor fabrication, glass etching, and petrochemical refining applications where HF co-exists with particulate.

Better per-unit value than the GMD-P100 for multi-gas programs

An important and counterintuitive finding: the MSA 815182 GME-P100, at its listed price per cartridge, is actually less expensive than the MSA 815181 GMD-P100 (its listed price/unit) while providing dramatically broader gas coverage — nine gases vs two. For any program where the hazard extends beyond ammonia/methylamine alone, the GME-P100 is simultaneously more protective and lower cost than the GMD-P100. This is one of the clearest buy-up decisions in the MSA GM-series lineup. Read the MSA GMD-P100 review for the scenario where ammonia-only coverage is the correct specification.

Full Comfo platform compatibility — half-mask to full-face without cartridge change

The GM threaded mount gives the 815182 the same platform breadth as all other GM-series cartridges. A program can run half-mask Comfo Classic facepieces (APF 10) for routine monitoring tasks and MSA Ultra-Elite full-face (APF 50) for higher-concentration or emergency scenarios, using the identical GME-P100 cartridge in both configurations. The written program specification remains unchanged; only the facepiece changes with the protection-factor requirement.

Where the MSA 815182 GME-P100 falls short

No organic vapor coverage — the most critical limitation

This limitation is worth stating plainly and prominently: the MSA 815182 GME-P100 contains no organic vapor sorbent. Hydrocarbons, solvents (acetone, MEK, toluene, xylene, petroleum distillates), and any other VOC will pass through the GME-P100 cartridge without being captured. In facilities where organic solvents co-exist with inorganic gas hazards — common in chemical manufacturing, laboratory settings, and general industrial maintenance — the GME-P100 is an incomplete and potentially dangerous specification.

For OV + acid gas combinations on the Comfo platform, the MSA GMC-P100 addresses OV plus acid gas plus P100, though its inorganic gas list does not match the full nine-gas GME breadth. For the broadest multi-gas coverage including OV on a different platform, the 3M 60926 is the cross-brand benchmark that adds OV to a multi-gas + P100 combination — but requires 3M facepieces. See the 3M 60926 review for the full comparison.

No ESLI — change-out schedule is mandatory

Like all GM-series cartridges, the 815182 has no end-of-service-life indicator. Several of the nine gases covered — hydrogen fluoride, chlorine dioxide, formaldehyde — can cause serious injury before sensory warning properties provide reliable detection at all concentrations. A written, validated change-out schedule is not optional under OSHA 29 CFR 1910.134(d)(3)(iii) when using this cartridge in any formal respiratory protection program. In multi-gas environments where several species load the sorbent simultaneously, change-out intervals will typically be shorter than for single-gas exposure at the same individual TWA.

No mercury vapor or radioiodine coverage

Mercury vapor and radioiodine require dedicated specialty sorbents not present in the GME-P100. For mercury vapor applications (chlor-alkali plants, fluorescent lamp recycling, certain mining operations), the MSA Mersorb P100 is the correct Comfo-platform selection. For radioiodine, the MSA GMI is the appropriate cartridge. The GME-P100 should not be substituted for either specialty application. See the MSA Mersorb P100 review for mercury-specific programs.

Higher cost than the gas-only GME when particulate is not documented

At its listed price per cartridge versus approximately its listed price for the MSA 492790 GME (gas-only), the P100 integration adds approximately its listed price per unit. When respirable particulate is genuinely not a documented hazard, that premium produces no compliance benefit. The GME-P100 is the right specification only when the hazard assessment confirms both inorganic gas and particulate exposure. Over-specifying to the P100 tier as a precaution against undocumented particulate is a sign that the hazard assessment needs to be updated, not that the higher-cost cartridge is universally the safer choice.

MSA 815182 GME-P100 vs competitive multi-gas P100 cartridges

Key comparison note: The 3M 60926 adds organic vapor coverage that the MSA GME-P100 lacks — if OV is in your documented hazard profile and you are willing to use 3M facepieces, the 60926 is the more complete specification. Read the 3M 60926 review for the full cross-platform analysis. The MSA Advantage GME-P100 uses a snap-on mount for MSA Advantage platform facepieces — not interchangeable with the Comfo thread.

MSA GME-P100 on Amazon → 3M 60926 on Amazon → MSA Advantage GME-P100 on Amazon →

A combination cartridge carries two approvals — and two change triggers

This is the point most often missed on combination media. A gas-plus-P100 cartridge is approved twice over: once for the gas or vapor its sorbent is rated against, and once as a P100 particulate filter at 99.97 percent. Neither half covers the other. The sorbent does nothing for dust, fume or mist, and the P100 layer does nothing for gases or vapors — it simply sits in the same housing.

Because the two halves fail differently, they need different replacement rules and the earlier of the two governs. The sorbent is replaced on an end-of-service-life indicator where one exists, or otherwise on a change schedule built from objective data, as OSHA 1910.134(d)(3)(iii) requires — never on smell or taste. The particulate filter loads rather than breaks through, so its practical trigger is increased breathing resistance, along with damage, soiling or contamination. A cartridge whose filter side is still breathing freely can be well past its sorbent life, and a cartridge that has become hard to breathe through must come off regardless of how much sorbent capacity remains. The combination does not extend the life of either half.

One consequence for cost: combination cartridges are replaced on the shorter of the two clocks, so per-cartridge price is a poor guide to running cost. Confirm the approval covering your exact part on the NIOSH Certified Equipment List — the approved-substance list and any escape-only qualifiers are properties of the approval, not of the marketing description.

What a “multi-gas” cartridge does and does not cover

MSA’s letter codes name a specific approved list, not a general capability. The GMA is organic vapor; GMB acid gas; GMC organic vapor plus acid gas; GMD ammonia and methylamine; and the multi-gas GME and GMT cover a broader but still enumerated set. “Multi-gas” never means “any gas”. Each approval names the substances, and several carry qualifiers that matter more than the headline — MSA lists hydrogen sulfide on the GME for escape only, which is a different duty entirely from working in it.

Two limits apply no matter which letter is on the cartridge. No air-purifying cartridge removes carbon monoxide. CO is not adsorbed by the sorbents used in these cartridges, so a CO hazard is answered by ventilation, monitoring, and supplied air — never by a cartridge, whatever its multi-gas designation. And a gas or vapor cartridge does nothing for particulate: dust, fume, mist and lead need a particulate filter, which is why the combination parts exist. Read the approved-substance list for the exact part number against your air monitoring, and where the contaminant or its concentration is unknown, the answer is not a broader cartridge — it is measurement, or supplied air.

These cartridges only fit MSA facepieces

Cartridge connections are proprietary. MSA Advantage and Comfo cartridges thread onto MSA facepieces and nothing else — they do not fit 3M bayonet respirators, Honeywell North, or Moldex, and no adapter makes that combination approved. This matters beyond convenience, because a NIOSH approval covers a complete assembly: a specific facepiece with specific media. Mixing a cartridge from one manufacturer onto another’s facepiece voids the approval even if the parts physically engage, which means the respirator is no longer NIOSH-approved equipment for the purposes of OSHA 1910.134.

The practical rule when restocking: match the cartridge to the facepiece brand first, then to the hazard. Confirm the approval covering your exact combination on the NIOSH Certified Equipment List rather than from a listing, and check the letter designation printed on the cartridge against what your hazard assessment calls for. Where a program runs more than one brand of facepiece, the stores that go with each need to be physically separated — the most common way the wrong cartridge reaches a face is a shared bin.

When to change a cartridge — and why “when I smell it” is not the answer

OSHA 1910.134(d)(3)(iii) is explicit: where gas or vapor cartridges are used, the employer must either fit them with an End of Service Life Indicator approved for the contaminant, or implement a change schedule based on objective information or data that ensures cartridges are replaced before the end of their service life. Relying on odor, taste, or irritation as the primary signal is not one of the permitted options, and the reason is straightforward: many contaminants have poor warning properties, individual sensitivity varies widely, and by the time a vapor is detectable inside the facepiece the breakthrough has already happened.

Mercury is the sharpest illustration. Mercury vapor has no odor at all, which is exactly why NIOSH-approved mercury cartridges carry a colorimetric ESLI — the indicator changes color as the sorbent loads, giving the wearer a visible end-of-service signal that a nose cannot provide. Particulate filters follow a different rule: they load rather than break through, so the practical trigger is increased breathing resistance, along with damage, soiling, or contamination of the filter. Replace a particulate filter when it becomes harder to breathe through, and never wash or attempt to clean filter media.

What has to be in place before anyone wears this

A respirator is the one piece of PPE that comes with a program attached. Where respirators are required, OSHA 1910.134 obliges the employer to run a written respiratory protection program with a named administrator, and four elements govern whether the equipment on this page will actually protect the person wearing it.

Medical evaluation comes first. Under 1910.134(e), a worker must be medically evaluated — using the Appendix C questionnaire or an equivalent examination — before fit testing or use, because breathing through a respirator imposes real physiological load. Fit testing is annual and model-specific under 1910.134(f): a passing test on one make, model and size does not transfer to another, so changing facepiece or size means testing again. Facial hair that crosses the sealing surface prohibits use — this is not a grooming preference but a seal failure, and no amount of strap tension compensates. And a user seal check goes on every single donning, per Appendix B-1, which takes seconds and is the only check that happens at the moment of use. Cartridge and filter selection follows from air monitoring and a hazard assessment; where the contaminant or its concentration is unknown, the answer is not a better cartridge.

The rest of the MSA Comfo cartridge range

Each combination cartridge has a gas-only sibling, and the choice between them is simply whether particulate is present. For acid gas there is the GMB and its GMB-P100; for organic vapor plus acid gas the GMC and GMC-P100; for ammonia and methylamine the GMD and GMD-P100; and for the multigas list the GME and GME-P100. Two specialist combinations have no gas-only twin: the GMI for radioiodine and the MerSorb-P100 for mercury vapor. Where particulate is the only hazard, the 815177 low-profile P100 covers it alone. Facepieces sit under MSA half mask respirators and MSA full face respirators, media under MSA respirator filters and cartridges.

Why trust WC Safety

WC Safety is an independent, affiliate-supported review site. We hold no inventory, sell nothing directly, and earn only from qualifying purchases made through clearly marked links — which never changes what a cartridge is approved to do. Reviews are compiled by Steven Eaton from MSA’s published technical data, the NIOSH approval record, the live listing, and the standards themselves (42 CFR 84, OSHA 1910.134) linked throughout. We hold no laboratory and run no breakthrough or fit testing, and we publish no customer-rating aggregate for any product, because we have no customers to aggregate. Where the published record is silent we say so rather than fill the gap.

Our methodology

This review is compiled from MSA’s published cartridge literature, the NIOSH approval record, the live listing, and the regulatory text. The score is an editorial judgment of approval fit, facepiece compatibility, hazard coverage and value — not a measured result, not a breakthrough test, and not an average of user ratings. Approved substances and the approval number for your exact part should be confirmed on the NIOSH Certified Equipment List and on the cartridge itself; where a listing and an approval disagree, the approval governs.

Researched and written by Steven Eaton, editor of WC Safety. Steven holds no safety certification and does not test products; this page compares what manufacturers publish, with the gaps in that record marked. Last reviewed July 2026.

More questions on this topic

What gases does the MSA 815182 GME-P100 protect against?

The MSA 815182 GME-P100 is NIOSH-approved under 42 CFR Part 84 against nine inorganic and reactive gases: chlorine (Cl₂), sulfur dioxide (SO₂), chlorine dioxide (ClO₂), hydrogen chloride (HCl), hydrogen sulfide (H₂S, escape only), ammonia (NH₃), methylamine (CH₃NH₂), formaldehyde (HCHO), and hydrogen fluoride (HF). It also provides integrated P100 particulate filtration (≥99.97% at 0.3 μm). It does not protect against organic vapors, carbon monoxide, mercury vapor, or radioiodine.

Does the MSA GME-P100 protect against organic vapors?

No — and this is the most important limitation to verify before specifying the 815182. The GME-P100 contains no organic vapor sorbent. VOCs, solvents, hydrocarbons, and other organic compounds pass through the cartridge unfiltered. For facilities with both organic vapor and inorganic gas co-exposure, a different cartridge specification is required. On the MSA Comfo platform, the MSA GMC-P100 addresses OV plus acid gas plus P100, though it does not match the GME's nine-gas breadth. For the broadest OV + multi-gas + P100 coverage, the 3M 60926 on the 3M platform is the cross-brand benchmark.

MSA GME-P100 vs MSA GME — what is the difference?

The MSA 492790 GME provides the same nine-gas inorganic sorbent without an integrated P100 filter, at approximately its listed price per cartridge. The MSA 815182 GME-P100 adds the integrated P100 layer for its listed price per cartridge — the premium per unit. Choose the GME when particulate is not a documented hazard; choose the GME-P100 when particulate or aerosol is also present. Read the full MSA GME review for the gas-only scenario analysis.

Is the MSA 815182 GME-P100 NIOSH-approved?

Yes. The MSA 815182 GME-P100 is NIOSH-approved under 42 CFR Part 84 for the listed nine gas chemistries and for P100 particulate filtration. Verify the current approval certificate and TC-number on the NIOSH NPPTL Certified Equipment List before including in a formal written respiratory protection program.

What is the GTIN for the MSA 815182 GME-P100?

The manufacturer SKU is 815182. Use these values when verifying against the NIOSH CEL or entering into procurement systems.

What respirators are compatible with the MSA 815182 GME-P100?

The MSA 815182 GME-P100 uses the MSA GM threaded mount and is compatible with: MSA Comfo Classic (half-mask, APF 10), MSA Comfo II (half-mask, APF 10), MSA Ultra-Elite (full-face, APF 50), and MSA Ultra-Twin (full-face, APF 50). It is not compatible with MSA Advantage snap-on facepieces, 3M bayonet facepieces, or Moldex facepieces.

MSA GME-P100 vs 3M 60926 — which should I use?

The 3M 60926 adds organic vapor coverage that the MSA GME-P100 lacks — if OV is in your documented hazard profile, the 3M 60926 on a 3M facepiece is the more complete specification. If OV is not a documented hazard and you are running an MSA Comfo platform, the GME-P100 is the correct and platform-appropriate choice. If you are considering switching platforms from 3M to MSA, verify that the hazard coverage difference (OV gap) is acceptable before specifying. See the 3M 60926 review for the full cross-platform analysis.

Is the MSA GME-P100 appropriate for wastewater treatment work?

Yes — wastewater treatment is the primary application for the GME-P100 when particulate co-exposure is documented. Wastewater operations typically generate ammonia, hydrogen sulfide, and chlorine gas hazards alongside biosolid aerosols or fine particulate from biosolids handling, filter media, and aeration equipment. The GME-P100 covers ammonia and chlorine for work use; hydrogen sulfide is listed for escape only, so sustained H2S exposure needs a different basis. Verify whether organic chemical co-exposure exists in the specific work zone before finalizing the specification.

Does the MSA GME-P100 protect against mercury vapor?

No. Mercury vapor requires a dedicated Mersorb (activated charcoal impregnated with mercury-specific sorbent) cartridge. The MSA Mersorb P100 is the correct Comfo-platform selection for mercury vapor applications. The GME-P100 should not be substituted for mercury vapor exposure. See the MSA Mersorb P100 review.

Can the MSA GME-P100 be used in IDLH atmospheres?

No. The GME-P100 is an air-purifying respirator and cannot be used in IDLH atmospheres or oxygen-deficient environments (below 19.5% O₂). Under OSHA 29 CFR 1910.134(d)(2)(i), only a full-face pressure-demand SCBA or a combination supplied-air respirator with an auxiliary self-contained air supply is acceptable in IDLH conditions.

How does the MSA GME-P100 compare to the MSA GMD-P100 in terms of value?

The MSA 815182 GME-P100, at its listed price per cartridge, is less expensive than the MSA 815181 GMD-P100 (its listed price/unit) while covering nine inorganic gases versus the GMD-P100's two (ammonia and methylamine only). For any program where the hazard assessment extends beyond ammonia and methylamine, the GME-P100 is simultaneously broader in coverage and lower in cost — one of the clearest buy-up decisions in the MSA lineup. The GMD-P100 is only the correct specification when the hazard is exclusively ammonia/methylamine with no other inorganic gas component. Read the MSA GMD-P100 review for the narrower alkaline-gas-only scenario.

How should I schedule cartridge changes with the MSA GME-P100?

A written change-out schedule is required under OSHA 29 CFR 1910.134(d)(3)(iii) because the GME-P100 has no ESLI. In multi-gas environments, sorbent depletion is accelerated by simultaneous loading from multiple species — a change-out schedule based on a single-gas model may be non-conservative. Many programs in wastewater treatment and chemical plants use per-shift replacement as the simplest compliant approach. Consult a Certified Industrial Hygienist (CIH) for a concentration-based schedule using validated service-life models.