MSA 806059 GMT Multi-Gas Cartridge for Comfo Respirators — 2-Pack

MSA GMT Multi-Gas Cartridge Overview

The MSA GMT is a chemical-only, multi-gas cartridge designed for the Comfo bayonet-mount respirator platform, sold in a 2-pack (SKU 806059) for $78.93 — approximately $39.47 per cartridge. Its defining feature is a tritium-impregnated sorbent bed that provides broad-spectrum inorganic gas protection across hazard classes not covered by any single-gas Comfo cartridge. Workers who need simultaneous coverage against acid gases, sulfur-based compounds, and tritium in a single cartridge will find no closer match in the MSA Comfo lineup.

For a full overview of how the GMT fits within respirator cartridge selection methodology, the respirator cartridge selection guide covers exposure assessment, cartridge class matching, and change-schedule requirements. The respirator filter types explained guide clarifies the difference between chemical cartridges and particulate filters — both relevant when evaluating the GMT's gas-only protection scope. If your hazard inventory includes organic vapors alongside inorganic gases, review the organic vapor vs. P100 comparison before committing to the GMT. The full MSA respirator filters and cartridges collection lists every Comfo-compatible cartridge with pricing and pack sizes.

Where the GMT Fits in Respirator Selection

Respirator cartridge selection begins with the hazard — not the cartridge. If your industrial hygienist or SDS review has confirmed inorganic gas exposures (chlorine, sulfur dioxide, hydrogen sulfide, ammonia/methylamine, hydrogen chloride, hydrogen fluoride, formaldehyde) AND a potential tritium exposure pathway, the GMT is the only Comfo-series cartridge that addresses that combined hazard profile in a single unit.

The decision logic runs as follows:

• Inorganic acid gases only, no tritium → consider MSA GMB
• Multi-gas inorganic hazards, no tritium, no particulates → consider MSA GME
• Multi-gas inorganic hazards + particulates → consider MSA GME-P100
• Multi-gas inorganic hazards + confirmed tritium pathway → MSA GMT
• Organic vapors + acid gases → consider MSA GMC or GMC-P100

The respirator cartridge color chart guide maps NIOSH cartridge color codes to hazard class so you can confirm GMT's classification at a glance before purchase.

Who Should Buy the MSA GMT?

Buy the GMT if:

• Your SDS or industrial hygienist report confirms tritium exposure as part of your chemical inventory
• Your facility handles multiple inorganic gas hazards simultaneously (e.g., wastewater plants where H₂S, Cl₂, and SO₂ coexist)
• You already own a Comfo Classic, Comfo II, Advantage 200 LS, Ultra-Twin, or Ultra-Elite respirator and need a bayonet-mount cartridge
• Your exposure profile requires coverage across ammonia, methylamine, formaldehyde, and acid gases in one cartridge without carrying spares of multiple types
• Nuclear fuel cycle or tritium-handling operations require a specialty sorbent bed not present in standard multi-gas cartridges

Don't buy the GMT if:

• Your primary hazard is organic vapors — the GMA organic vapor cartridge is purpose-built for that application
• You need combined gas + particulate protection — the GME-P100 adds 99.97% P100 filtration without sacrificing multi-gas coverage
• You use an MSA Advantage snap-on respirator — the GMT uses a bayonet mount incompatible with the Advantage platform
• Your exposure is ammonia/methylamine only — the dedicated GMD ammonia cartridge may provide more targeted protection at lower cost
• Your environment is oxygen-deficient or IDLH — supplied-air or SCBA is required in those conditions regardless of cartridge selection

What Does the GMT Protect Against?

The GMT's multi-sorbent bed is engineered to address a broader chemical inventory than any single-class Comfo cartridge. The table below maps confirmed hazard classes to protection status and buyer guidance based on MSA published specifications.

What the GMT Does NOT Protect Against

• Organic vapors and solvents — no activated carbon sorbent for hydrocarbon-class chemicals; use the GMA or GMC for those hazards
• Particulates — the GMT contains no filter media; dust, smoke, mist, and biological aerosols pass through unimpeded
• Radioactive iodine — the GMT does not include the silver-zeolite media used in the GMI iodine/P100 cartridge
• Mercury vapor — mercury adsorption requires the specialized MERSORB media found only in the MERSORB P100 cartridge
• Carbon monoxide and other asphyxiant gases — air-purifying respirators cannot protect against CO; supplied-air equipment is required

Best Applications for the MSA GMT

Wastewater Treatment and Municipal Utilities

Wastewater facilities generate simultaneous H₂S, Cl₂, and SO₂ exposures in confined lift stations, aeration tanks, and chlorination rooms. The GMT's multi-gas coverage eliminates the need to swap cartridges between tasks — workers can move through multiple hazard zones with a single cartridge set. Pair with the MSA full-face respirator collection for splash and eye protection in chemical dosing areas.

Chemical Manufacturing and Process Industries

Process plants handling HCl, HF, SO₂, and chlorine as feedstocks or byproducts require broad-spectrum acid gas coverage that single-class cartridges cannot deliver. The GMT supports routine maintenance, sampling, and emergency response tasks in environments where the chemical inventory is confirmed through air monitoring data. The cartridge selection guide covers change-schedule calculation for multi-gas environments where breakthrough timing varies by contaminant.

Nuclear Fuel Cycle and Tritium-Handling Facilities

The GMT's tritium-impregnated sorbent bed addresses a protection gap no other MSA Comfo cartridge fills. Tritium handling operations at national laboratories, nuclear fuel fabrication, and fusion research facilities require this specialty sorbent chemistry in addition to standard inorganic gas coverage. Always verify that the GMT's assigned protection factor and change schedule satisfy your facility's radiation protection program requirements before deployment.

Pulp, Paper, and Bleaching Operations

Kraft pulp mills generate ClO₂, Cl₂, SO₂, and H₂S across bleaching, digester, and recovery boiler operations. The GMT covers all four simultaneously, making it a practical choice for maintenance personnel who rotate through multiple process areas. See the filter types explained guide to understand why gas-phase cartridges alone are insufficient if the mill also generates wood dust or lime particulates — a combination cartridge or added prefilter may be warranted.

MSA GMT Pros and Cons

Compatible MSA Respirators

The GMT uses the MSA Comfo bayonet threaded mount — a quarter-turn locking mechanism distinct from the MSA Advantage snap-on system. The table below lists confirmed compatible respirators and explicit incompatibilities to prevent mismatched purchases.

Browse the full MSA full-face respirator collection and MSA half-mask respirator collection to confirm your specific model's mount type.

MSA GMT vs. Other MSA Comfo Cartridges

All cartridges below use the same Comfo bayonet mount and are drawn from the MSA respirator filters and cartridges collection. OV = organic vapor, AG = acid gas, P100 = particulate filter 99.97%.

MSA GMT vs. MSA GME

The GMT and the GME multigas cartridge share the same nine inorganic gas hazard classes. The GMT adds a tritium-impregnated sorbent layer absent from the GME — that is the sole technical differentiator between the two. For facilities without a documented tritium hazard, the GME at $24.49 per box of 10 (approximately $2.45/cartridge) is substantially more cost-effective than the GMT at $39.47/cartridge. Workers who have confirmed tritium in their chemical inventory have no alternative in the MSA Comfo lineup — the GMT is the only path. For environments that additionally require particulate protection, neither the GMT nor the GME qualifies; the GME-P100 adds 99.97% P100 filtration to the same multi-gas base without the tritium sorbent.

MSA GMT vs. MSA GMC (OV/Acid Gas)

The GMC organic vapor/acid gas cartridge targets a fundamentally different hazard profile: it combines activated-carbon OV protection with acid gas coverage at $103.45 per box of 10. The GMT provides no organic vapor protection whatsoever but extends acid gas coverage across more inorganic classes while adding the tritium sorbent bed. Workers in facilities with both solvent and inorganic acid gas hazards face a genuine selection challenge — neither cartridge covers both profiles fully, and a hygienist review of the dominant hazard should drive the decision. If tritium is present, the GMC cannot substitute for the GMT under any circumstances.

MSA GMT Quick Answers

What does MSA GMT stand for?

GMT is MSA's internal model designation for a Multi-Gas/Tritium chemical cartridge in the Comfo GM-series lineup. The G prefix identifies it as a Comfo-series gas cartridge; M indicates multi-gas coverage; T identifies the tritium-impregnated specialty sorbent layer that distinguishes it from the otherwise similar GME.

Is the MSA GMT a NIOSH-approved cartridge?

Yes. The GMT is approved by NIOSH under 42 CFR Part 84 for the chemical classes listed in its approval. The specific NIOSH TC approval number is printed on the cartridge label and packaging — verify that approval number against your facility's hazard inventory as part of your respiratory protection program.

Does the GMT include particulate filtration?

No. The GMT is a chemical-only cartridge with no filter media for particulates. Dust, mist, metal fumes, and biological aerosols are not captured. If your exposure includes both gas-phase hazards covered by the GMT and particulate hazards, you will need a combination cartridge or a separate particulate prefilter compatible with your respirator — consult the filter types guide for options.

How many cartridges are in a pack of MSA GMT?

The GMT is sold as a 2-pack (SKU 806059) for $78.93, equating to approximately $39.47 per cartridge. Unlike some Comfo cartridges sold in boxes of 10 or 6, the GMT is only available in this 2-pack format through WC Safety.

What respirator does the MSA GMT fit?

The GMT uses the MSA Comfo bayonet threaded mount, compatible with the Comfo Classic (Hycar and Silicone), Comfo II, and Advantage 200 LS half-face respirators, as well as the Ultra-Twin and Ultra-Elite full-face models that share the same bayonet interface. It is not compatible with MSA Advantage snap-on respirators.

Does the GMT protect against organic vapors like solvents or paint fumes?

No. The GMT contains no activated carbon sorbent for organic compound adsorption. For solvent, hydrocarbon, or paint-fume hazards, select the GMA organic vapor cartridge or the GMC OV/acid gas cartridge depending on whether acid gases are also present.

How is the MSA GMT different from the MSA GME?

Both cartridges cover the same nine inorganic gas hazard classes. The GMT adds a tritium-impregnated sorbent bed not present in the GME. In the absence of a tritium hazard, the GME is considerably less expensive per cartridge. The tritium sorbent is the only technical differentiator — there is no other performance difference between the two models.

MSA GMT Specifications

Helpful Buying Guides

• How to Choose a Respirator Cartridge — Complete Selection Guide
• Respirator Filter Types Explained: Cartridges, Filters, and Combination Units
• Respirator Cartridge Color Chart — NIOSH Hazard Class Codes
• Organic Vapor vs. P100: Which Cartridge Do You Need?
• Best Respirator for Welding Fumes — 2026 Buyer's Guide
• 3M Respirator Filter and Cartridge Guide — Cross-Reference and Selection
• 3M Respirator Filters and Cartridges Collection
• Moldex Respirator Cartridges and Filters Collection

MSA GMT Multi-Gas Cartridge Frequently Asked Questions

Can I use the MSA GMT with a full-face respirator?

Yes, provided your full-face respirator uses the Comfo bayonet threaded mount. The Ultra-Twin and Ultra-Elite full-face respirators are compatible with the GMT. Pairing the GMT with a full-face respirator raises the assigned protection factor from 10 (half-face) to 50, providing greater protection against higher concentrations of covered inorganic gases and tritium. Always verify mount compatibility with your specific respirator model and lot before deployment.

How do I know when to replace my MSA GMT cartridge?

MSA and OSHA require a written cartridge change schedule based on your specific chemical concentrations, humidity, temperature, work rate, and service life data. Never rely solely on odor detection — many hazardous gases (including tritium) have no reliable odor threshold for warning. Your respiratory protection program administrator is responsible for establishing and documenting the change schedule. Discard cartridges if they are physically damaged, exceed their service-life schedule, or have been exposed to an IDLH event.

Is the MSA GMT compatible with the Advantage snap-on respirator system?

No. The GMT uses a Comfo bayonet threaded mount that is physically incompatible with the MSA Advantage snap-on attachment mechanism. Attempting to force a Comfo cartridge onto an Advantage respirator will not seat correctly and will result in an unsealed connection. Purchase Advantage-series cartridges for Advantage platform respirators.

Does the MSA GMT protect against mercury vapor?

No. Mercury vapor adsorption requires the specialized MERSORB activated carbon impregnated with sulfur chemistry, found only in the MSA MERSORB P100 cartridge. The GMT's sorbent bed is not rated for mercury service.

Can the MSA GMT be used for radioactive iodine?

No. Radioactive iodine capture requires a silver-zeolite impregnated medium, which is present only in the MSA GMI iodine/P100 cartridge. The GMT's tritium sorbent bed addresses tritium (³H) specifically — it is not rated for radioactive iodine isotopes.

How does the per-cartridge cost of the GMT compare to the GME?

The GME multigas cartridge is sold in boxes of 10 for $24.49, approximately $2.45 per cartridge. The GMT is sold in 2-packs for $78.93, approximately $39.47 per cartridge — roughly 16× the per-unit cost of the GME. The price premium reflects the specialty tritium sorbent layer. Facilities without a confirmed tritium hazard should use the GME to avoid unnecessary cost; the GMT provides no other performance advantage over the GME for non-tritium environments.

Does the GMT protect against formaldehyde?

Yes. Formaldehyde is included in the GMT's multi-gas coverage. This makes the GMT suitable for pathology labs, embalming facilities, composite wood manufacturing operations, and other environments where formaldehyde coexists with inorganic acid gas hazards. If formaldehyde is the only gas hazard, a single-class cartridge may be more cost-effective — discuss your exposure profile with an industrial hygienist.

Is the MSA GMT the same as the GME?

No — though they share the same nine inorganic gas hazard classes, the GMT adds a tritium-impregnated sorbent bed not present in the GME. This is the sole technical differentiator. Both use the same Comfo bayonet mount and cover the same list of acids, sulfur compounds, ammonia/methylamine, formaldehyde, and chlorine-family gases. Facilities without tritium exposure should default to the GME on cost grounds.

What is the pack configuration for the MSA GMT?

The GMT is sold exclusively in a 2-pack (two cartridges per pack) under SKU 806059 for $78.93. This is designed for dual-cartridge respirators that require a matched pair — one cartridge per side — on the Comfo platform. Larger bulk pack options (boxes of 6 or 10) are not available for the GMT in the current product lineup.

Can the MSA GMT be used in combination with a P100 filter?

The GMT itself has no integrated P100 layer. Whether an add-on particulate prefilter can be attached depends on the specific respirator model — some Comfo respirators support a canister-style arrangement with a prefilter. Consult your MSA respirator's documentation. Alternatively, if you need both the GMT's gas coverage and particulate protection, evaluate whether a combination cartridge or upgraded model better suits your application, as the GME-P100 provides multi-gas plus P100 in one unit (without the tritium sorbent).

Is there an Amazon listing for the MSA GMT cartridge?

The MSA GMT Multi-Gas Cartridge is available through WC Safety directly. Purchase through the WC Safety store to ensure you receive genuine MSA product with current lot codes and valid change-schedule documentation.

What inorganic gases does the MSA GMT cover?

Based on MSA published data for the multi-gas class, the GMT covers: chlorine (Cl₂), sulfur dioxide (SO₂), chlorine dioxide (ClO₂), hydrogen chloride (HCl), hydrogen sulfide (H₂S), ammonia (NH₃), methylamine, formaldehyde (CH₂O), and hydrogen fluoride (HF) — plus tritium via its specialty impregnated sorbent bed. Confirm these chemical classes against the NIOSH TC approval number printed on your cartridge before use.