MSA 815180 GMC-P100 OV/Acid Gas/P100 Cartridge Review (4.6/5)

Is the MSA 815180 GMC-P100 the right triple-combination cartridge for mixed chemical and particulate environments?

Short answer: Yes — for Comfo-platform users who need NIOSH-approved protection against organic vapors, acid gases, and airborne particulates in a single cartridge. The MSA 815180 GMC-P100 is the triple-combination workhorse of the MSA GM-series lineup, and at $7.75 per cartridge it delivers more protection per dollar than the vapor-only MSA 464046 GMC. For environments where particulate co-exposure is absent and you want the narrowest possible specification match, the MSA 464046 GMC is the purpose-built alternative — but most industrial environments with OV and acid gas exposure also produce aerosols or mists, making the GMC-P100 the correct default.

The MSA 815180 GMC-P100 is the Comfo platform's triple-combination cartridge — the answer when your hazard assessment documents organic vapors, acid gases, and airborne particulates in the same work environment. In the MSA respirator filters and cartridges collection, it occupies a unique position: the only GM-series bayonet cartridge that layers P100 particulate filtration (≥99.97% efficiency) over an activated carbon bed for both OV and acid gas adsorption, delivering three-class coverage without requiring a separate pre-filter or add-on adapter.

This review covers the 815180 GMC-P100's three-layer construction, its cost-per-cartridge advantage over the sibling MSA 464046 GMC, how it stacks up against the 3M 60923 and 3M 60926, and the specific work scenarios — chemical manufacturing, automotive refinishing in acid environments, semiconductor operations — where it is the specification-correct choice.

Editorial Verdict: 4.6 / 5

The MSA 815180 GMC-P100 is the best-value triple-combination cartridge on the Comfo platform — NIOSH-approved for organic vapors, acid gases, and P100 particulate filtration in a single GM-series bayonet cartridge. At a listed price of $7.75 per cartridge ($46.47/box of 6), it costs less per unit than the vapor-only MSA 464046 GMC while delivering broader protection — a rare case where the more capable option is also the cheaper one. The primary limitation is platform lock-in: the GM-series bayonet is Comfo/Ultra-Elite only. Verify pricing before purchasing as prices are subject to change.

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Who should use the MSA 815180 GMC-P100?

• Chemical manufacturing workers with confirmed co-exposure to OV solvents, acid gases (Cl₂, HCl, SO₂, HF), and airborne particulates (dust, fume, mist) in the same operation — the single-cartridge solution to a three-class hazard profile.
• Automotive refinishing technicians in acid environments — solvent-based coatings plus acid-wash prep or etching primer operations that generate both vapor and aerosol exposure simultaneously.
• Semiconductor and electronics manufacturing — processes using organic solvents and acid gases alongside particulate-generating steps (CMP slurry, dicing, etching residues).
• Battery processing and recycling operations — sulfuric acid aerosol, SO₂ off-gassing, and solvent exposure combined; the P100 layer handles the sulfuric acid mist that the vapor-only GMC does not.
• Comfo-platform fleet managers seeking a default dual-class cartridge — when the facility has mixed operations and one cartridge must serve multiple hazard zones, the GMC-P100 is the safer over-specification than the vapor-only GMC.

See the full MSA respirator filters and cartridges collection for the complete GM-series lineup.

What the MSA 815180 GMC-P100 does well

Three-layer construction delivers genuine triple-class protection

The 815180 GMC-P100's internal architecture stacks three distinct filtration mechanisms in sequence: the outermost P100 electrostatic filter captures ≥99.97% of airborne particulates (including oil-based aerosols, metal fumes, and fine dusts); the activated carbon bed adsorbs organic vapor solvents; and the impregnated sorbent layer neutralizes acid gas molecules (Cl₂, HCl, SO₂, HF). This layered design means the cartridge does not compromise on any single class — each layer is purpose-formulated for its specific chemistry, not a blended compromise.

Cost advantage over the vapor-only sibling

The 815180 GMC-P100 is listed at $7.75 per cartridge ($46.47/box of 6), versus $10.35 per cartridge for the MSA 464046 GMC. The per-shift cost delta is approximately $5.20 per shift (two-cartridge use) in favor of the GMC-P100 — a meaningful number in high-frequency replacement programs. For a safety program running 250 shifts per year with two workers, that is over $2,600 in annual savings while adding particulate protection. Current pricing should be verified before purchasing.

Eliminates separate pre-filter logistics

In facilities without the GMC-P100, providing OV/AG coverage plus particulate protection requires either a combination cartridge with a separate pre-filter or two different cartridge SKUs for different hazard zones. The 815180 GMC-P100 consolidates this into a single cartridge SKU — simplifying procurement, inventory, and the written respiratory protection program. There is no separate MSA Low Profile P100 Particulate Filter needed when the GMC-P100 is deployed.

P100 coverage for oil and water aerosols

The P100 NIOSH approval is the highest particulate efficiency class — ≥99.97% filtration, rated for both oil-based and non-oil aerosols. This matters in environments like automotive refinishing (lacquer and waterborne paint aerosol), semiconductor wet processes (acid mist with organic solvent vapor), and chemical manufacturing (process aerosol containing both OV and acid gas components). N95 and R95 pre-filters would not provide adequate protection in these environments; the P100 layer in the GMC-P100 does.

NIOSH 42 CFR Part 84 approval across all three classes

The 815180 GMC-P100 carries NIOSH approval under 42 CFR Part 84 for organic vapor, acid gas, and P100 particulate simultaneously — a single approval document that satisfies OSHA 29 CFR 1910.134 documentation requirements for all three hazard classes without the complexity of cross-referencing separate TC numbers. Verify current approval status on the NIOSH Certified Equipment List.

Where the MSA 815180 GMC-P100 falls short

No ESLI — change schedule is mandatory documentation

Like all MSA GM-series cartridges, the 815180 GMC-P100 lacks an End-of-Service-Life Indicator. Under OSHA 29 CFR 1910.134(d)(3)(iii), a written change schedule based on breakthrough time data, concentration levels, temperature, humidity, and work duration is required. The P100 layer offers a practical cue — when the particulate filter becomes noticeably harder to breathe through, it signals particulate loading — but this is not a substitute for a documented vapor breakthrough schedule, as vapor breakthrough occurs independently of filter loading.

Platform-locked to GM-series bayonet facepieces

The GMC-P100 is incompatible with the Advantage series snap-on respirators (Advantage 200, 290, 420, 1000, 3000) and with all 3M and Moldex facepieces. Organizations running a mixed fleet of Comfo and Advantage respirators cannot standardize on this single SKU. For Advantage snap-on facepieces, the equivalent triple-combination cartridge is the MSA Advantage GMC-P100.

No ammonia, mercury, formaldehyde, or CO coverage

The triple-combination coverage stops at OV, acid gas, and P100 particulates. The 815180 GMC-P100 provides no protection against ammonia (NH₃), methylamine, mercury vapor, formaldehyde at high concentrations, or carbon monoxide. For ammonia co-exposure on the Comfo platform, the MSA GMD is the correct cartridge. For multi-gas coverage extending to ammonia and additional inorganic gases, the MSA GME-P100 covers a broader chemical profile.

MSA 815180 GMC-P100 vs the competitive OV/AG/P100 cartridge field

How the 815180 GMC-P100 compares to triple-combination competitors across the site's inventory:

3M 60923 on Amazon 3M 60926 on Amazon

Note on the 3M 60926: if your hazard profile includes ammonia or methylamine in addition to OV/AG/particulates and you are running a 3M facepiece fleet, the 3M 60926 extends coverage to those gases. See the 3M 60926 review. If your facepiece platform is Comfo/Ultra-Elite and ammonia co-exposure is documented, the MSA GME-P100 covers the broader chemical profile on the MSA platform.

MSA Comfo GMC family: 815180 GMC-P100 vs 464046 GMC

The Comfo GM-series offers two OV/acid gas cartridges. The GMC-P100 is the triple-combination option; the 464046 GMC is the vapor-only dual-class. In most mixed-hazard environments the GMC-P100 is the correct default:

• Buy the MSA 815180 GMC-P100 if aerosols, mists, metal fumes, or dusts are present alongside OV and acid gas hazards — or if you want a single default cartridge for a mixed-hazard Comfo fleet. It costs less and does more in most real-world environments.
• Buy the MSA 464046 GMC only if your documented risk assessment confirms a purely vapor/acid gas exposure profile with zero particulate co-hazard. See the MSA 464046 GMC review for the detailed case for that cartridge.

Shop the Comfo GMC series on Amazon → MSA 815180 GMC-P100 MSA 464046 GMC

Compatible respirators for the MSA 815180 GMC-P100

The 815180 GMC-P100 uses the MSA GM-series bayonet mount. Confirmed compatible facepieces:

• MSA Comfo Classic (Hycar and Silicone variants) — the core Comfo half-mask; all GM-series cartridges mount directly. APF 10.
• MSA Comfo II — updated Comfo half-mask; same GM-series bayonet interface. APF 10.
• MSA Ultra-Twin — full-face facepiece with GM-series bayonet; APF 50 with the GMC-P100.
• MSA Ultra-Elite — MSA's premium full-face respirator with GM-series bayonet mount. APF 50. The highest-protection configuration available on the MSA platform for this cartridge.

Note: The MSA 815180 GMC-P100 is NOT listed as compatible with the Advantage 200 LS bayonet adapter (unlike the 464046 GMC). Confirm facepiece compatibility against the MSA compatibility chart before deployment. The equivalent cartridge for Advantage snap-on facepieces is the MSA Advantage GMC-P100.

Because the 815180 GMC-P100 integrates P100 filtration, a separate pre-filter such as the MSA Low Profile P100 Particulate Filter is not needed — and would not fit over the GMC-P100 cartridge in any case.

For the P100 half-series (OV-only + P100, or AG-only + P100), see the MSA GMA-P100 review and the MSA GMB-P100 review.

Top compatible MSA respirators on Amazon → MSA Ultra-Elite Full-Face MSA Comfo Classic

Category context: where the GMC-P100 sits in the GM-series P100 lineup

The MSA GM-series includes a P100-combination cartridge for each gas class. Understanding how the GMC-P100 relates to its P100 siblings helps clarify when to upgrade or switch:

• MSA GMA-P100 — OV + P100 only. Correct when no acid gas is present. See the GMA-P100 review.
• MSA GMB-P100 — AG + P100 only. Correct when no OV is present. See the GMB-P100 review.
• MSA 815180 GMC-P100 — OV + AG + P100. This cartridge. Correct for the dual-class vapor environment plus particulate co-hazard.
• MSA GMD-P100 — NH₃/MA + P100. Correct when ammonia or methylamine is the primary gas hazard alongside particulates.
• MSA GME-P100 — multi-gas combination + P100. Covers the broadest chemical profile when a wider range of gas hazards is present.

For the 3M platform equivalent with multi-gas + P100 coverage, see the 3M 60926 review and browse the 3M respirator cartridges and filters collection.

Total cost of ownership: MSA 815180 GMC-P100 replacement schedule and per-shift economics

At $46.47 per box of 6 ($7.75 per cartridge as listed, subject to change), the 815180 GMC-P100's TCO advantage over the 464046 GMC is clearest in high-replacement-frequency programs:

• Per-shift pair cost: Two cartridges per shift = approximately $15.50/shift at the listed price. Compare to $20.70/shift for the 464046 GMC — a $5.20 saving per shift per worker while gaining P100 protection.
• Annual program savings example: 1 worker, 5 shifts/week, 250 shifts/year = approximately $1,300 in annual savings vs the 464046 GMC, while adding P100 coverage.
• Change schedule requirements: No ESLI — vapor breakthrough schedule required per OSHA 1910.134(d)(3)(iii). The P100 layer will visually load with particulate (graying) and increase breathing resistance before vapor breakthrough occurs; replace on the vapor change schedule, not just when the filter appears loaded.
• Pack-quantity consideration: Boxes of 6 vs the 464046 GMC's boxes of 10. For programs requiring cartridge pairs (two per shift), a box of 6 yields 3 complete shifts — order multiples of 2 boxes (12 cartridges = 6 shifts) for clean inventory management.

For ammonia co-exposure, neither the GMC-P100 nor the 464046 GMC provides protection — the correct Comfo-platform cartridge is the MSA GMD. See the MSA GMD review. For multi-gas coverage extending to ammonia, see the MSA GME review.

Final verdict: MSA 815180 GMC-P100

The MSA 815180 GMC-P100 is the best-value triple-combination cartridge on the MSA Comfo platform. It delivers NIOSH-approved organic vapor, acid gas, and P100 particulate coverage in a single GM-series bayonet cartridge — at a lower per-cartridge list price than the vapor-only MSA 464046 GMC. For the majority of industrial environments where OV and acid gas hazards are present, particulate co-exposure is also likely, making the GMC-P100 the specification-correct and cost-correct default choice.

The 4.6/5 rating reflects the cartridge's strong protection-per-dollar value, three-class NIOSH approval, and positive-lock GM-series mount — offset by the absence of ESLI and the platform limitation to Comfo/Ultra-Elite facepieces.

• Buy the MSA 815180 GMC-P100 if you have OV + acid gas hazards on the Comfo platform and any particulate co-exposure is present — or if you want the safest default in a mixed-hazard environment.
• Buy the MSA 464046 GMC if your documented risk assessment confirms pure vapor/acid gas exposure with zero particulate hazard.
• Buy the MSA Advantage GMC-P100 if your facepiece is an Advantage snap-on model.
• Buy the 3M 60923 if your fleet runs 3M 6000/7000/FF facepieces and you need the same three-class protection on the 3M platform. Check 3M 60923 on Amazon.

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MSA 815180 GMC-P100 — Frequently Asked Questions

Is the MSA 815180 GMC-P100 NIOSH-approved for organic vapor, acid gas, and P100 particulates?

Yes. The MSA 815180 GMC-P100 carries NIOSH approval under 42 CFR Part 84 for all three classes simultaneously: organic vapor, acid gas (Cl₂, HCl, SO₂, HF), and P100 particulate filtration (≥99.97% efficiency including oil-based aerosols). Verify the current approval status on the NIOSH Certified Equipment List.

MSA 815180 GMC-P100 vs MSA 464046 GMC — which should I buy?

The GMC-P100 is the better choice in most industrial environments. It adds P100 particulate filtration and costs less per cartridge as listed ($7.75 vs $10.35). Buy the MSA 464046 GMC only if your documented risk assessment explicitly confirms zero particulate co-hazard — a relatively uncommon scenario in environments where OV and acid gas exposure is present. See the MSA 464046 GMC review for details on that cartridge.

MSA 815180 GMC-P100 vs 3M 60923 — which triple-combination cartridge wins?

Both cartridges deliver OV + acid gas + P100 protection with equivalent NIOSH approval standards. The critical differentiator is platform: the 815180 GMC-P100 uses the MSA GM-series bayonet for Comfo and Ultra-Elite facepieces; the 3M 60923 uses the 3M bayonet for 6000, 7000, and FF series facepieces. Select based on which facepiece platform your fleet runs — these cartridges are not interchangeable across brands. Check 3M 60923 price on Amazon.

What respirators are compatible with the MSA 815180 GMC-P100?

The 815180 GMC-P100 is compatible with GM-series bayonet facepieces: MSA Comfo Classic (Hycar and Silicone), MSA Comfo II, MSA Ultra-Twin, and the MSA Ultra-Elite. It is NOT compatible with Advantage series snap-on respirators or any 3M/Moldex facepiece. Confirm compatibility against the MSA technical documentation before deployment.

Does the MSA 815180 GMC-P100 protect against ammonia?

No. The GMC-P100's coverage is OV + acid gas + P100 particulate. It provides zero protection against ammonia (NH₃) or methylamine (CH₃NH₂). If ammonia is a documented hazard, the correct Comfo-platform cartridge is the MSA GMD (vapor only) or the MSA GMD-P100 (with particulate filtration). See the MSA GMD review.

How often should I replace the MSA 815180 GMC-P100 cartridge?

No ESLI is present. OSHA 29 CFR 1910.134(d)(3)(iii) requires a written change schedule based on breakthrough time calculations for the specific vapor and acid gas contaminants, concentration levels, temperature, humidity, and work duration. Replace on the vapor/acid gas breakthrough schedule — do not rely solely on P100 filter loading as a replacement cue, as vapor breakthrough occurs independently of particulate accumulation. Consult a Certified Industrial Hygienist (CIH) for program documentation.

What does P100 mean on the MSA 815180 GMC-P100?

P100 is the NIOSH highest-efficiency particulate class under 42 CFR Part 84: ≥99.97% filtration efficiency, rated for oil-based and non-oil aerosols. The "P" designates oil-proof (versus "N" for not oil-resistant or "R" for oil-resistant). P100 cartridges are appropriate for environments with oil aerosols, metal fumes, isocyanates, and other fine particulates where N95 or R95 efficiency would be insufficient.

Can the MSA 815180 GMC-P100 replace a separate vapor cartridge plus pre-filter combination?

Yes — in most cases. The 815180 GMC-P100 integrates P100 particulate filtration directly into the cartridge body, eliminating the need for a separate pre-filter adapter on compatible Comfo and Ultra-Elite facepieces. This simplifies cartridge logistics, reduces part numbers in the inventory, and eliminates the fit variability introduced by separate pre-filter attachments.

What is the APF for the MSA 815180 GMC-P100?

The APF is determined by the facepiece, not the cartridge. On a half-mask respirator (Comfo Classic, Comfo II), the APF is 10 — protection up to 10× the applicable PEL. On a full-face facepiece (Ultra-Twin, Ultra-Elite), the APF is 50 — protection up to 50× the PEL. Neither configuration is appropriate for IDLH atmospheres.

Is the MSA 815180 GMC-P100 appropriate for automotive refinishing?

Yes — for solvent-based automotive refinishing operations where acid-wash primer, etching products, or surface pretreatments generate both OV vapor and acid gas co-exposure alongside spray aerosol. The P100 layer covers the spray aerosol; the OV and acid gas layers cover the vapor hazards. Confirm that your specific chemical profile is within the NIOSH-approved coverage classes before deployment, and document the change schedule per OSHA 1910.134.

MSA 815180 GMC-P100 vs MSA GME-P100 — which has broader coverage?

The MSA GME-P100 offers broader gas coverage — extending to a wider range of inorganic gases beyond the four acid gases covered by the GMC-P100. If your hazard assessment identifies gas classes beyond OV and standard acid gases, the GME-P100 may be the more appropriate selection. The GMC-P100 is the specification-correct choice when the documented hazard is specifically OV + acid gas (Cl₂, HCl, SO₂, HF) + particulate. See the MSA GME review for the multi-gas alternative.

Do I need one or two MSA 815180 GMC-P100 cartridges per use?

The 815180 GMC-P100 installs on both sides of a two-cartridge facepiece. Each use cycle consumes two cartridges (one per side). The box of 6 individual cartridges yields 3 complete cartridge pairs per box. Plan inventory in multiples of 2 boxes for whole-shift coverage without leftover odd cartridges.

Can the MSA 815180 GMC-P100 be used in IDLH conditions?

No. Air-purifying respirators — regardless of cartridge type or efficiency class — are prohibited in immediately dangerous to life or health (IDLH) atmospheres. IDLH conditions require atmosphere-supplying respirators (SCBA or supplied-air with escape bottle). The GMC-P100 is also prohibited in oxygen-deficient atmospheres (below 19.5% O₂).

Is the MSA 815180 GMC-P100 appropriate for semiconductor manufacturing?

For many semiconductor processes — including wet etch with acid chemistries, solvent cleaning, and particulate-generating operations (CMP polishing, dicing) — the triple-combination coverage of the GMC-P100 provides a strong specification match. However, semiconductor environments often include chemicals not covered by the OV/AG/P100 classes (e.g., certain specialty gases, dopant chemicals). Conduct a full chemical inventory review and consult the facility IH before deploying this cartridge in a semiconductor environment.

What is the shelf life of an unopened MSA 815180 GMC-P100 cartridge?

Store in original sealed packaging at room temperature, away from chemical vapors and moisture. General industry guidance for activated carbon combination cartridges in sealed packaging is approximately 5 years from manufacture date. The P100 filter layer does not degrade chemically in storage but may lose mechanical integrity if stored in conditions of extreme humidity or physical compression. Begin the change schedule clock upon opening — ambient air exposure starts the adsorption clock on vapor and acid gas capacity.