MSA Cartridge Review

Is the MSA 492790 GME the right multi-gas cartridge for mixed inorganic gas environments?

Short answer: Yes — when your hazard assessment documents two or more inorganic reactive gases and no organic vapor or particulate co-exposure. The MSA 492790 GME covers nine inorganic and reactive gases — chlorine, sulfur dioxide, chlorine dioxide, hydrogen chloride, hydrogen sulfide, ammonia, methylamine, formaldehyde, and hydrogen fluoride — in a single sorbent cartridge without an integrated P100 layer. That combination makes it the right selection for wastewater treatment, water treatment, chemical manufacturing, and emergency response to inorganic gas releases where particulate is not a simultaneous hazard. If your documented hazards also include respirable particulates, step directly to the MSA 815182 GME-P100. If your hazards include organic vapors or solvents, neither the GME nor GME-P100 is sufficient — you need a different cartridge series entirely.

The MSA 492790 GME is the broadest inorganic/reactive gas cartridge in MSA's Comfo-platform GM-series lineup — nine distinct chemical approvals under NIOSH 42 CFR Part 84 in a single bayonet-mount sorbent cartridge. Sold in boxes of 10 at $24.49 ($2.45 per cartridge as listed — verify current price before ordering), it is one of the most cost-efficient ways to address a mixed inorganic gas hazard on the Comfo platform. This review examines the GME's nine-gas coverage in detail, explains the critical distinction versus the GMD (alkaline gas only) and GME-P100 (same gas coverage plus P100), and identifies the facility types and job tasks where the GME is the right pick — and where it is not.

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Editorial verdict — MSA 492790 GME: 4.4/5
The MSA 492790 GME delivers nine-gas inorganic coverage at a remarkably low per-unit cost — the right cartridge when your written hazard assessment documents multiple reactive gases and no particulate or organic vapor co-exposure. The 0.6-point deduction reflects the absence of an ESLI, no particulate protection, and zero organic vapor coverage — three hard limits that are easy to misjudge if the hazard assessment isn't specific.

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Who the MSA 492790 GME is for

• Wastewater treatment operators where ammonia, hydrogen sulfide, and chlorine (from disinfection operations) are all documented hazards — the GME's nine-gas coverage handles all three in one cartridge
• Water treatment plant workers handling chlorination and ammonia dosing simultaneously
• Pulp-and-paper mill workers exposed to chlorine dioxide and sulfur dioxide as process gases
• Chemical plant emergency response teams deployed to inorganic gas release scenarios where the specific release chemistry may not be pre-known
• Laboratory workers handling mixed inorganic acids (HCl, HF, H₂S) and alkalis (ammonia) without organic solvent co-exposure
• Safety managers specifying a single-cartridge solution for facilities where documented hazards span multiple inorganic gas categories and no particulate or OV exposure is present

Not the right pick for: Painting, coating, solvent cleaning, welding fume (metal particulate), asbestos abatement, woodworking dust, or any application where organic vapors or aerosols are present. See the full MSA respirator filters and cartridges collection for OV and OV+AG alternatives.

What the MSA 492790 GME does well

Nine-gas inorganic coverage: the broadest single sorbent in the GM-series

The MSA 492790 GME is NIOSH-approved under 42 CFR Part 84 against nine distinct inorganic and reactive gas chemistries: chlorine (Cl₂), sulfur dioxide (SO₂), chlorine dioxide (ClO₂), hydrogen chloride (HCl), hydrogen sulfide (H₂S), ammonia (NH₃), methylamine (CH₃NH₂), formaldehyde (HCHO), and hydrogen fluoride (HF). No other single sorbent cartridge in the MSA Comfo GM-series covers this full list in one unit. The chemical breadth matters most in facilities where the hazard profile is wide-spectrum inorganic — wastewater treatment, water treatment, and pulp-and-paper operations are canonical examples. A single GME cartridge satisfies the hazard assessment without requiring cartridge-specific engineering controls or chemical-by-chemical selection justification.

The key advantage over the GMD: acid gas + alkaline gas in one sorbent

The MSA 464033 GMD covers only alkaline gases (NH₃ and methylamine). The MSA GMB acid gas cartridge covers acid gases but not alkaline gases. The GME uniquely spans both categories — it is the appropriate choice wherever the hazard assessment documents both acid-type and alkaline-type gases co-existing, such as wastewater treatment where chlorine (acid) and ammonia (alkaline) are both present. This dual-polarity coverage in a single sorbent is the GME's defining technical advantage within the GM-series family.

Exceptional per-unit cost for nine-gas coverage

At approximately $2.45 per cartridge (as listed — verify current price before ordering), the MSA 492790 GME is one of the most cost-efficient multi-gas cartridges on the Comfo platform. For operations that require frequent cartridge changes due to high chemical concentrations or short shift-based replacement schedules, the per-unit economics of the GME make it meaningfully easier to maintain a compliant, practical change-out program than higher-cost alternatives. The gas-only configuration (no P100 layer) keeps manufacturing cost and unit price low where particulate protection is not needed.

Formaldehyde coverage — important for multi-chemistry lab and process environments

The GME's approval against formaldehyde (HCHO) distinguishes it from most acid-gas-only cartridges. In wastewater treatment and chemical manufacturing environments where formaldehyde appears alongside inorganic acid gases, a single GME covers both categories. This is worth calling out because formaldehyde is a IARC Group 1 carcinogen (confirmed human carcinogen) and an OSHA regulated substance under 29 CFR 1910.1048 — correct cartridge selection for formaldehyde exposure is a compliance requirement, not just a best practice.

Where the MSA 492790 GME falls short

Zero organic vapor protection — the most common misselection risk

The GME sorbent contains no activated carbon for organic vapor capture. Solvents, petroleum distillates, ketones, esters, aromatic hydrocarbons, and other VOCs pass through the GME cartridge unimpeded. In facilities where both organic vapors and inorganic gases co-exist — common in mixed chemical manufacturing, labs using both solvents and inorganic acids, and water treatment operations that also use organic coagulants — the GME is an incorrect and dangerous selection. The MSA GMC (OV+acid gas) or MSA GMC-P100 addresses OV + acid gas combinations, though it does not carry the full nine-gas inorganic breadth. Consult your industrial hygienist when both OV and inorganic gas hazards appear in the same work zone.

No integrated P100 — separate particulate filter required for dust/aerosol co-exposure

When particulate is present alongside inorganic gas hazards, the GME alone is insufficient. The correct upgrade is the MSA 815182 GME-P100, which provides the identical nine-gas sorbent coverage with an integrated P100 filter at $31.57 per cartridge. In wastewater treatment operations where aeration creates biosolid aerosols, or in chemical plants where reactive gas releases co-occur with dust from solid handling, the GME-P100 is the more protective and operationally simpler choice. The GME's separate-filter-stacking approach (adding a MSA Low Profile P100 filter to a gas-only GME) increases assembly complexity and creates an additional maintenance item to track.

No ESLI — written change-out schedule is mandatory

The GME has no end-of-service-life indicator. Under OSHA 29 CFR 1910.134(d)(3)(iii), a respirator program cannot rely on odor or taste for chemical cartridge change-out when adequate warning properties are not confirmed at all concentrations. Several chemicals the GME covers — chlorine dioxide, hydrogen fluoride, formaldehyde — can cause serious respiratory damage before breakthrough concentrations are reliably detected by smell. A written, validated change-out schedule or per-shift replacement policy is not optional; it is a regulatory requirement when using this cartridge in any compliant program.

H₂S coverage noted as "escape only" in some applications

Hydrogen sulfide coverage on many combination sorbent cartridges, including some GM-series variants, may be limited to escape concentrations rather than sustained work duration at elevated H₂S TWA levels. Where hydrogen sulfide is a primary documented hazard at higher concentrations, confirm the GME's approved service life against the documented H₂S concentration with the NIOSH approval certificate and MSA technical data before specifying — do not assume full-duration protection.

MSA 492790 GME vs comparable multi-gas inorganic cartridges

Key comparison note: The 3M 6006 adds organic vapor coverage that the MSA GME lacks — if OV is in your documented hazard profile, the 3M 6006 (on 3M platform) or MSA GMC (on Comfo platform) is more appropriate. The MSA GMT adds a tritium-specific sorbent for nuclear/radiological applications not present in the GME.

MSA GME on Amazon → MSA GME-P100 on Amazon → 3M 6006 on Amazon →

MSA Comfo multi-gas family comparison

• Buy the MSA 492790 GME if: Your hazard assessment documents only inorganic/reactive gas hazards (from the nine-gas list above) with no particulate, aerosol, or organic vapor co-exposure. At ~$2.45/cartridge, it is the highest-value entry point for multi-gas inorganic programs.
• Buy the MSA 815182 GME-P100 if: Respirable particulates or aerosols are documented alongside the inorganic gas hazards. Same nine-gas sorbent, integrated P100, simpler assembly than stacking a separate filter. Read the MSA GME-P100 review for the full breakdown.
• Buy the MSA 806059 GMT if: Your facility involves radioactive tritium or nuclear operations requiring a tritium-specific sorbent in addition to the multi-gas coverage. Standard industrial/commercial applications do not require the GMT premium. See the MSA GMT review.

Shop the Comfo multi-gas series on Amazon → MSA GME (gas only) MSA GME-P100 MSA GMT

Compatible respirators for the MSA 492790 GME

The MSA 492790 GME uses the MSA GM bayonet mount — the Comfo platform connector. Compatible facepieces:

• MSA Comfo Classic — half-mask, APF 10
• MSA Comfo II — half-mask, APF 10
• MSA Advantage 200 LS — verify GM bayonet compatibility against current MSA product data before ordering
• MSA Ultra-Elite — full-face, APF 50
• MSA Ultra-Twin — full-face, APF 50, dual bayonet

The GME does not fit MSA Advantage snap-on platform facepieces (the MSA Advantage 420 uses the snap-on mount). For Advantage snap-on programs, the nearest equivalent is the MSA Advantage GME snap-on cartridge. For Advantage programs requiring particulate, the MSA Advantage GME-P100 is the parallel option.

Top compatible Comfo respirators on Amazon → MSA Comfo Classic MSA Ultra-Elite MSA Advantage 420

GME in context: inorganic multi-gas cartridge category

The "multi-gas inorganic" cartridge category exists to serve facilities where hazard assessments identify reactive gases across multiple chemical families simultaneously. In pure organic vapor environments (painting, coating, solvent degreasing), a simpler OV cartridge like the MSA GMA is correct and lower cost. In pure acid gas environments (electroplating, certain lab work), the MSA GMB suffices. The GME occupies the space where multiple inorganic reactive gas chemistries co-exist — a common situation in heavy industrial water and wastewater treatment, pulp-and-paper, and chemical manufacturing.

What the GME does not address — and cannot — is organic vapor co-exposure. That gap is the most critical limitation for users crossing over from 3M's ecosystem, where the 3M 6006 adds OV coverage to its multi-gas inorganic sorbent. The MSA GME is narrower in that respect; it is the right choice when the hazard assessment has been specifically confirmed to include no organic vapor component.

For the mixed OV + acid gas scenario on the Comfo platform, the MSA GMC (OV + acid gas) and MSA GMC-P100 are the relevant options, though their inorganic gas list does not match the full nine-gas coverage of the GME.

Total cost of ownership: MSA 492790 GME

At ~$2.45 per cartridge (box of 10, verify current price), the GME has one of the lowest consumable costs of any multi-gas cartridge on the market. A full change-out for a paired half-mask or full-face program costs approximately $4.90 in cartridges per event — making daily or even per-shift replacement economically viable at scale without requiring the kind of concentration-based change-out schedule optimization that higher-cost cartridges demand.

Change-out frequency considerations:

• Concentration levels: At low inorganic gas TWA concentrations common in routine wastewater treatment operations, the GME sorbent has meaningful service life. At acute or accidental release concentrations, per-shift or per-incident replacement is appropriate.
• Humidity: High humidity degrades reactive gas sorbent capacity. In wet environments (spray chlorination, aerated digesters), a shorter change-out schedule is warranted.
• Multiple gas species: When several of the nine gases are simultaneously present, each contributes to sorbent loading. A multi-species exposure accelerates change-out relative to single-gas exposure at the same TWA.

For comparison: upgrading to the MSA 815182 GME-P100 adds $29.12 per cartridge for the integrated P100 layer. If particulate is not a documented hazard, that premium produces no compliance value. If it is documented, the GME-P100 eliminates the need for separate P100 filter discs and retainers, which have their own cost and assembly complexity — the net TCO comparison may favor the GME-P100 even in moderate-particulate environments.

Final verdict: MSA 492790 GME

The MSA 492790 GME earns a 4.4/5 rating as the most cost-efficient nine-gas inorganic cartridge on the MSA Comfo platform. Its chemical breadth — spanning acid gases, alkaline gases, and formaldehyde in one NIOSH-approved unit — is genuinely valuable for wastewater treatment, water treatment, and chemical manufacturing programs where multiple inorganic reactive gases are documented. The low per-unit cost makes frequent change-out feasible without budget strain.

The 0.6-point deduction is honest: no organic vapor coverage, no integrated P100, and no ESLI are real operational limitations. The most common misspecification risk is using the GME in environments where organic solvents are also present — a situation that demands an OV-equipped cartridge instead. When particulate co-exposure is documented, step directly to the MSA 815182 GME-P100 and read the MSA GME-P100 review.

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Frequently asked questions: MSA 492790 GME

What gases does the MSA 492790 GME protect against?

The MSA 492790 GME 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), ammonia (NH₃), methylamine (CH₃NH₂), formaldehyde (HCHO), and hydrogen fluoride (HF). It does not protect against organic vapors, carbon monoxide, mercury vapor, radioiodine, or particulates.

MSA GME vs MSA GMD — what is the difference?

The MSA GMD covers only alkaline gases — ammonia and methylamine. The MSA 492790 GME covers nine gases including both alkaline (NH₃, methylamine) and acid/reactive (Cl₂, SO₂, HCl, HF, ClO₂, H₂S) chemistries, plus formaldehyde. When your hazard assessment documents only ammonia or methylamine, the GMD is the more targeted and typically lower-cost choice. When the hazard profile includes chlorine, sulfur compounds, or other inorganic gases in addition to ammonia, the GME is the correct selection. See the MSA GMD review for the gas-only ammonia option and the MSA GMD-P100 review for the particulate version.

Does the MSA GME protect against organic vapors?

No. The GME contains no activated carbon or OV sorbent. Organic vapors, solvents, petroleum distillates, and VOCs are not captured. This is the GME's most important limitation — facilities with organic vapor co-exposure require a different cartridge. On the MSA Comfo platform, the MSA GMC provides OV + acid gas coverage, though its inorganic gas breadth does not match the full nine-gas GME list.

MSA GME vs MSA GME-P100 — when should I choose each?

Choose the MSA 492790 GME when your documented hazards are limited to the nine inorganic gases listed and no respirable particulate or aerosol exposure is present. Choose the MSA 815182 GME-P100 when particulate or aerosol is also documented — it provides the identical nine-gas sorbent coverage with an integrated P100 filter. Read the full MSA GME-P100 review before specifying in mixed gas + particulate environments. The GME-P100 costs $31.57 per cartridge versus ~$2.45 for the GME — the premium is only warranted when particulate protection is genuinely needed.

Is the MSA 492790 GME NIOSH-approved?

Yes. The MSA 492790 GME is NIOSH-approved under 42 CFR Part 84 for the listed nine gas chemistries. Verify the current approval certificate and TC-number on the NIOSH NPPTL Certified Equipment List before specifying for a written respiratory protection program.

What is the GTIN for the MSA 492790 GME?

The GTIN for the MSA 492790 GME is 0816687297684. The manufacturer SKU is 492790. Use these values when verifying against the NIOSH CEL or entering into procurement systems.

Can I add a P100 filter to the MSA GME to get particulate protection?

The MSA Comfo platform does support separate P100 filter discs (such as the MSA Low Profile P100 filter) that can be mounted with compatible retainers on gas-only cartridges. However, the integrated approach — using the MSA 815182 GME-P100 — is simpler, eliminates assembly error risk, and is the MSA-recommended configuration for combined gas + particulate protection on the Comfo platform.

What respirators is the MSA 492790 GME compatible with?

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

Is the MSA GME appropriate for wastewater treatment operations?

Yes — wastewater treatment is one of the GME's primary applications. Wastewater operations typically involve documented exposure to ammonia (from biological treatment and decomposition), hydrogen sulfide (from anaerobic zones), chlorine (from disinfection), and potentially SO₂ and HCl from chemical treatment steps. The GME's nine-gas coverage addresses all of these in a single cartridge. However, if biosolid aerosols or respirable dust are also present in the work zone, the MSA GME-P100 is the more complete specification.

MSA GME vs 3M 6006 — which is better?

The 3M 6006 adds organic vapor coverage that the MSA 492790 GME lacks — a meaningful advantage in facilities where VOC co-exposure exists alongside inorganic gas hazards. However, the 3M 6006 uses 3M's bayonet mount and is only compatible with 3M facepieces; it cannot be used with MSA Comfo or Advantage platform respirators. The choice between them is primarily a platform decision (3M vs MSA facepiece) combined with a hazard assessment decision (OV present vs not). If OV is not in the documented hazard profile and you are running an MSA Comfo program, the GME is the correct and more economical selection.

Does the MSA GME protect against formaldehyde?

Yes. Formaldehyde (HCHO) is one of the nine gases covered by the MSA 492790 GME sorbent. This is important for facilities handling formaldehyde-generating processes or products — wastewater treatment, anatomy labs, certain manufacturing processes — where formaldehyde may co-exist with other inorganic gas hazards. Note that formaldehyde is an OSHA-regulated substance under 29 CFR 1910.1048 and a IARC Group 1 carcinogen; correct cartridge selection for formaldehyde exposure is a compliance requirement.

How does the MSA GME handle the no-ESLI requirement under OSHA?

OSHA 29 CFR 1910.134(d)(3)(iii) requires a written change-out schedule when a cartridge lacks an ESLI (as the GME does) unless the cartridge is replaced after each use. Programs using the GME must either implement per-shift/per-use replacement or develop a validated change-out schedule based on chemical concentrations, work duration, humidity, and work rate using an accepted engineering method (e.g., Wood's equation or supplier-provided service life data).

MSA GME vs MSA GMT — when does the GMT make sense?

The MSA 806059 GMT adds a tritium-specific sorbent to multi-gas inorganic coverage — relevant only for nuclear power plant workers, nuclear medicine facilities, and other operations involving tritium (³H) exposure. For standard industrial, municipal, and chemical applications, the tritium sorbent provides no benefit and the GMT's higher cost (~$39.47/unit) is unjustified. The GME is the correct selection for all non-tritium multi-gas inorganic programs. See the MSA GMT review for nuclear-specific applications.

Can the MSA GME be used in IDLH atmospheres?

No. Air-purifying respirators including the MSA 492790 GME cannot be used in IDLH atmospheres. Under OSHA 29 CFR 1910.134(d)(2)(i), only a full-face pressure-demand SCBA or a combination SAR with an auxiliary self-contained air supply is acceptable in IDLH environments. The GME is also not appropriate in oxygen-deficient atmospheres (below 19.5% O₂).

Is the MSA GME suitable for pulp-and-paper mill work?

Yes — pulp-and-paper mills are a primary application for the GME. Kraft process operations generate chlorine dioxide (ClO₂) and sulfur dioxide (SO₂) as process gases, with additional potential for H₂S from pulping liquors and NH₃ from chemical treatment. The GME's nine-gas coverage addresses all of these in one cartridge. Verify whether the specific work zone also involves particulate exposure (e.g., from wood dust during chip handling) — if so, the MSA GME-P100 is the complete specification.

Where can I find more MSA Comfo-platform cartridge reviews?

WC Safety publishes independent reviews across the full MSA GM-series. See the MSA GME-P100 review, the MSA GMD-P100 review, the MSA GMT review, and specialty cartridge reviews for MSA GMI radioiodine and MSA Mersorb mercury vapor. The MSA respirator filters and cartridges collection links all current inventory.