MSA GMC-P100 vs 3M 60923: OV/Acid Gas/P100 Cartridge Comparison (2026)
Quick Answer
Both the MSA 815180 GMC-P100 and 3M 60923 are NIOSH-approved triple-combination cartridges covering organic vapors, acid gases (HCl, Cl₂, SO₂, HF), and P100 particulate filtration. Protection class is equivalent. Platform compatibility determines the purchase. The MSA GMC-P100 fits MSA Comfo-platform facepieces only; the 3M 60923 fits 3M bayonet facepieces only. For facilities weighing a new platform, the acid gas coverage specs are comparable — but verify both against your specific chemical SDS before finalizing.
Important: Triple-combination cartridges are for use below IDLH concentrations only. Air-purifying respirators cannot be used in IDLH atmospheres. Always conduct air monitoring and involve an industrial hygienist when deploying these cartridges in acid gas environments.
MSA GMC-P100 vs 3M 60923 at a Glance
| Spec | MSA 815180 GMC-P100 | 3M 60923 OV/AG/P100 |
|---|---|---|
| Type | OV / Acid Gas / P100 Combination | OV / Acid Gas / P100 Combination |
| NIOSH Class | OV/AG/P100 (42 CFR Part 84) | OV/AG/P100 (42 CFR Part 84) |
| Particulate Rating | P100 — ≥99.97% efficiency | P100 — ≥99.97% efficiency |
| Organic Vapor Protection | ✓ Yes | ✓ Yes |
| Acid Gas — HCl (hydrogen chloride) | ✓ Yes | ✓ Yes |
| Acid Gas — Cl₂ (chlorine) | ✓ Yes | ✓ Yes |
| Acid Gas — SO₂ (sulfur dioxide) | ✓ Yes | ✓ Yes |
| Acid Gas — HF (hydrogen fluoride) | ✓ Yes | ✓ Yes |
| Platform / Mount | MSA Comfo (GM-series threaded bayonet) | 3M bayonet twist-lock |
| Pack Size | Box of 6 cartridges | Pairs (2 cartridges per pack) |
| Best For | MSA Comfo users in mixed acid gas + OV + particulate environments | 3M facepiece users in mixed acid gas + OV + particulate environments |
Verify acid gas coverage against current NIOSH approval labels and manufacturer datasheets for your specific application. Coverage listings reflect published product approvals at time of writing; confirm for your revision level.
Product Profiles
MSA 815180 GMC-P100 Combination Cartridge
The MSA 815180 GMC-P100 is the most comprehensive cartridge in MSA's Comfo-platform GM-series lineup, adding acid gas sorbent protection to the OV/P100 base provided by the GMA-P100. The result is a triple-combination cartridge covering organic vapors, acid gases including hydrogen chloride (HCl), chlorine (Cl₂), sulfur dioxide (SO₂), and hydrogen fluoride (HF), and P100-rated particulate filtration in a single integrated unit. This makes the GMC-P100 the appropriate selection for MSA Comfo-platform users in environments where multiple chemical hazard classes are simultaneously present.
The GMC-P100 uses the same GM-series threaded bayonet mount as the GMA and GMA-P100 cartridges, fitting the MSA Comfo Classic, Comfo II, Ultra-Twin, and Ultra Elite facepieces directly. Facilities that have invested in MSA Comfo facepieces and need to expand from OV-only or OV/P100 protection to acid gas coverage can make that change as a direct cartridge swap — the facepiece hardware does not change. The box-of-6 format supports bulk procurement programs typical in chemical processing, wastewater treatment, and manufacturing environments where these cartridges see regular use.
The GMC-P100 is the top of the MSA Comfo cartridge stack. There is no MSA Comfo-platform cartridge offering additional protection beyond what the GMC-P100 provides within the standard GM-series lineup. For environments where multiple gas classes are present at elevated concentrations, or where the contaminant mixture does not fit standard cartridge categories, consult MSA technical support and your industrial hygienist to verify cartridge suitability before deployment.
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3M 60923 OV/Acid Gas/P100 Combination Cartridge
The 3M 60923 is 3M's triple-combination cartridge covering organic vapors, acid gases (HCl, Cl₂, SO₂, HF), and P100 particulate filtration on the standard 3M bayonet platform. It is the acid gas upgrade from the OV/P100-only 3M 60921, with an additional acid gas sorbent layer integrated into the same cartridge form factor. The 3M 60923 fits the complete 3M bayonet facepiece family — 6000, 6500, and 7500 half-mask series and 6000, 7800S, and FF-400 full-face respirators — without requiring any hardware change from a facility already using 3M 60921 cartridges.
The 3M 60923 is the appropriate selection for 3M-platform users in environments where acid gases are present alongside organic vapors and particulate. Common application areas include chemical manufacturing, metal finishing, electroplating, wastewater treatment operations involving chlorine handling, laboratory settings, and semiconductor fabrication. As with all 3M combination cartridges, the SCS change schedule software can model OV sorbent service life, though acid gas sorbent service life modeling requires validated industrial hygiene data specific to your process conditions.
The 3M 60923 is not 3M's highest-protection cartridge — the 3M 60926 multi-gas cartridge adds additional gas classes beyond what the 60923 covers. However, for facilities whose hazard profile is covered by OV, acid gases (HCl, Cl₂, SO₂, HF), and P100, the 60923 is the correct selection at the lowest complexity. Stepping up to the 60926 should be driven by confirmed identification of contaminants not covered by the 60923's approval, not as a precaution.
Protection Scope
| Hazard Class | MSA 815180 GMC-P100 | 3M 60923 OV/AG/P100 |
|---|---|---|
| Organic Vapors (solvents, hydrocarbons) | ✓ Yes | ✓ Yes |
| Particulate — non-oil aerosols | ✓ P100 (≥99.97%) | ✓ P100 (≥99.97%) |
| Particulate — oil aerosols | ✓ P100 oil-resistant | ✓ P100 oil-resistant |
| Hydrogen Chloride (HCl) | ✓ Yes | ✓ Yes |
| Chlorine (Cl₂) | ✓ Yes | ✓ Yes |
| Sulfur Dioxide (SO₂) | ✓ Yes | ✓ Yes |
| Hydrogen Fluoride (HF) | ✓ Yes | ✓ Yes |
| Ammonia / Methylamine | ✗ No | ✗ No |
| Carbon Monoxide | ✗ No | ✗ No |
| Formaldehyde (standalone) | ✗ Not approved standalone | ✗ Not approved standalone |
Verify all approvals against current NIOSH labels and manufacturer datasheets for your specific product revision. This table reflects published approvals at time of writing.
Key Differences
- Platform incompatibility — same absolute rule. The MSA GMC-P100 uses the GM-series threaded bayonet (MSA Comfo only). The 3M 60923 uses the 3M bayonet twist-lock (3M facepieces only). No adapter exists between platforms. Wrong cartridge = cartridge that will not physically attach.
- Acid gas coverage at published specs is equivalent. Both cartridges are approved for HCl, Cl₂, SO₂, and HF. For facilities evaluating platforms from scratch on acid gas criteria alone, the published protection class is the same. Verify against your specific SDS and verify approval revision levels are current.
- Pack format and procurement logistics. MSA GMC-P100 ships in boxes of 6; 3M 60923 ships in pairs. For large-crew operations with documented high-frequency change schedules, the box format reduces procurement transactions. Individual-issue programs may prefer pairs.
- The 3M 60923 has a direct 3M-platform upgrade. For environments where additional contaminants beyond OV/AG/P100 are confirmed — such as additional gas classes not covered by the 60923 — the 3M 60926 multi-gas cartridge is available on the same 3M bayonet platform. MSA Comfo-platform users needing protection beyond the GMC-P100 scope would need to consult MSA for specialty solutions.
- Facepiece ecosystem reach. The 3M 60923 covers the full 3M bayonet installed base across half-mask and full-face options. The MSA GMC-P100 is limited to the Comfo family — still a large installed base in North American heavy industry and mining.
- For acid gas environments, full-face consideration is elevated. Many OSHA standards and ACGIH guidelines for acid gas exposures recommend or require full-face protection to prevent eye and mucous membrane exposure. Both platforms offer full-face options (MSA Ultra-Twin / Ultra Elite; 3M 7800S / FF-400) that accept these cartridges.
Which Should You Buy
You Have MSA Comfo-Platform Facepieces and Need Acid Gas Coverage
If your workforce is already equipped with MSA Comfo Classic, Comfo II, Ultra-Twin, or Ultra Elite respirators and the hazard assessment confirms acid gas exposure in addition to organic vapors and particulate, the MSA 815180 GMC-P100 is the correct upgrade. The direct cartridge swap from GMA-P100 (or GMA) to GMC-P100 requires no hardware change. Stock in box-of-6 quantities for operations with frequent change schedules or large crews.
You Have 3M Bayonet Facepieces and Need Acid Gas Coverage
If your workforce runs 3M 6000, 6500, or 7500 half-masks, or 3M 7800S or FF-400 full-face respirators, and your hazard assessment confirms OV plus acid gas plus particulate exposure, the 3M 60923 is the correct cartridge. The upgrade from 3M 60921 (OV/P100) to 3M 60923 (OV/AG/P100) is a direct cartridge swap.
You Are Starting a New Acid Gas Program From Scratch
Platform selection for a new acid gas respiratory protection program should begin with a full hazard assessment — contaminant identification, air monitoring, OSHA PEL and ACGIH TLV review, and determination of whether full-face protection is required. Both MSA Comfo and 3M bayonet platforms provide equivalent triple-combination protection at the published cartridge spec level. Facepiece selection should be driven by fit testing results, worker acceptance, and your supply chain. Acid gas environments frequently benefit from full-face facepieces — consider the Ultra Elite (MSA) or 7800S / FF-400 (3M) when both eye protection and respiratory protection are needed in the same PPE item.
Your Process Involves Ammonia or CO in Addition to Acid Gases
Neither the MSA GMC-P100 nor the 3M 60923 covers ammonia/methylamine or carbon monoxide. If your hazard profile includes these gases, you need a different cartridge class or a multi-contaminant combination not covered by either of these products. Consult your industrial hygienist and the applicable OSHA standard for your specific contaminant mix. On the 3M platform, the 3M 60926 multi-gas cartridge covers a broader range of gas classes.
Confirming Cartridge Suitability for Your Specific Application
The contaminant tables above reflect NIOSH-approved protection classes. Before deploying either cartridge, verify that your specific contaminant, at your measured concentration, and under your environmental conditions (temperature, humidity, work rate) is within the cartridge's rated service life. Acid gas environments carry higher consequence for breakthrough than many OV applications — a documented and validated change schedule is not optional.
Compatibility
MSA 815180 GMC-P100 — Compatible Facepieces
The MSA GMC-P100 mounts to all MSA Comfo-platform facepieces via the GM-series threaded bayonet:
- MSA Comfo Classic half-mask
- MSA Comfo II half-mask
- MSA Ultra-Twin full-face respirator
- MSA Ultra Elite full-face respirator
It is not compatible with MSA Advantage-platform respirators (Advantage 200 LS, 420, 1000, 3000, 4000), which use a different snap-on mount. It is not compatible with any 3M, Honeywell North, or other brand facepiece.
3M 60923 — Compatible Facepieces
The 3M 60923 uses the standard 3M bayonet twist-lock and fits all 3M respirators with that mount:
- 3M 6100 / 6200 / 6300 half-mask (6000 series)
- 3M 6502QL / 6503QL (6500 series QuickLatch)
- 3M 7501 / 7502 / 7503 (7500 series silicone)
- 3M 6000 series full-face respirators
- 3M 7800S full-face respirator
- 3M FF-400 series full-face respirators
It is not compatible with MSA Comfo, MSA Advantage, Honeywell North, or other brand facepieces.
Related Guides
- MSA GMA vs 3M 6001 — comparison of base OV-only cartridges on each platform, for applications without particulate or acid gas hazard.
- MSA GMA-P100 vs 3M 60921 — OV/P100 combination cartridge comparison for spray painting and coating applications without acid gas exposure.
- How to Choose a Respirator Cartridge — full decision framework covering all cartridge classes including acid gas combinations.
- Best 3M Respirator Cartridges — ranked buyer's guide across the full 3M cartridge lineup, including the 60923 and 60926.
- Respirator Cartridge ESLI Guide — covers ESLI technology, change schedule requirements, and OSHA compliance for vapor and acid gas cartridges.
- Respirator Cartridge Color Codes — NIOSH color-code guide for identifying cartridge type by visual inspection, including acid gas color coding.
- P95 vs R95 vs P100 Filter Class Guide — explains particulate filter ratings and the importance of P100 in oil-aerosol environments.
- 3M vs Honeywell North Respirator Cartridges — cross-brand platform comparison for facilities evaluating new programs.
- MSA Respirator Filters and Cartridges — full MSA cartridge collection at WC Safety.
- 3M Respirator Cartridges and Filters — full 3M cartridge collection at WC Safety.
Frequently Asked Questions
What acid gases does the MSA GMC-P100 protect against?
The MSA 815180 GMC-P100 is approved for organic vapors and acid gases including hydrogen chloride (HCl), chlorine (Cl₂), sulfur dioxide (SO₂), and hydrogen fluoride (HF), along with P100 particulate filtration. Verify the specific TC approval number on the cartridge label for the current NIOSH-approved contaminant list.
What acid gases does the 3M 60923 protect against?
The 3M 60923 is NIOSH-approved for organic vapors and acid gases including hydrogen chloride (HCl), chlorine (Cl₂), sulfur dioxide (SO₂), and hydrogen fluoride (HF), along with P100 particulate filtration. Consult 3M's current product datasheet and NIOSH approval label for the complete approved contaminant list.
Can I use the MSA GMC-P100 on a 3M facepiece?
No. The MSA GMC-P100 uses the MSA Comfo GM-series threaded bayonet mount. It is physically incompatible with 3M bayonet facepieces. No adapter exists.
Can I use the 3M 60923 on an MSA facepiece?
No. The 3M 60923 uses the 3M bayonet twist-lock. It will not attach to MSA Comfo, Ultra-Twin, or Ultra Elite facepieces.
What is the difference between the MSA GMA-P100 and MSA GMC-P100?
The MSA GMA-P100 (815178) provides organic vapor plus P100 protection — no acid gas coverage. The MSA GMC-P100 (815180) adds an acid gas sorbent layer covering HCl, Cl₂, SO₂, and HF. Both use the same MSA Comfo GM-series threaded bayonet mount and are a direct swap.
What is the difference between the 3M 60921 and 3M 60923?
The 3M 60921 provides organic vapor plus P100 protection — no acid gas coverage. The 3M 60923 adds acid gas coverage (HCl, Cl₂, SO₂, HF). Both use the standard 3M bayonet twist-lock and are a direct swap.
Does the GMC-P100 or 60923 protect against chlorine gas?
Yes. Both cartridges include chlorine (Cl₂) in their acid gas approval. However, concentrations must be within the cartridge's rated range and below IDLH levels. Air-purifying respirators cannot be used at or above IDLH concentrations — supplied-air or SCBA is required.
Is an OV/acid gas/P100 cartridge appropriate for chemical manufacturing?
Triple-combination cartridges are widely used in chemical processing, metal finishing, and laboratory settings where multiple chemical classes are present. Cartridge selection must be validated against the specific SDS, air monitoring data, and OSHA PELs or ACGIH TLVs. Involve an industrial hygienist for complex mixed-chemical environments.
What is the service life of an acid gas cartridge?
Acid gas sorbent service life depends on contaminant concentration, humidity, temperature, and breathing rate. Like OV cartridges, OV/AG combination cartridges typically lack a passive ESLI and require a documented change schedule per OSHA 29 CFR 1910.134(d)(3)(iii). Breakthrough of acid gases can occur without adequate odor warning — a change schedule is mandatory.
Which MSA facepieces are compatible with the MSA GMC-P100?
Comfo Classic, Comfo II, Ultra-Twin, and Ultra Elite. Not compatible with MSA Advantage-series or non-MSA facepieces.
Which 3M facepieces are compatible with the 3M 60923?
All 3M respirators using the standard 3M bayonet twist-lock: 6000 series half-masks (6100, 6200, 6300), 6500 series, 7500 series, and 6000/7800S/FF-400 full-face respirators.
Is a full-face respirator required for acid gas environments?
For many acid gas applications, OSHA regulations or ACGIH guidelines require full-face protection to prevent eye and mucous membrane exposure. The specific requirement depends on contaminant, concentration, and the applicable OSHA standard. Consult your industrial hygienist and the relevant OSHA standard for your industry and process.
Does the 3M 60923 or MSA GMC-P100 protect against carbon monoxide?
No. Neither cartridge provides carbon monoxide protection. CO requires a separate hopcalite or CO-specific sorbent cartridge, or a supplied-air respirator. Do not use these cartridges in CO-generating environments without additional respiratory protection for CO.
Can these cartridges be used for battery charging area acid mist?
Battery charging areas generate hydrogen gas and sulfuric acid mist. The acid gas approvals (SO₂, HCl, HF, Cl₂) do not cover all hydrogen compounds or battery-specific hazards comprehensively. Conduct a hazard assessment specific to your battery chemistry and consult OSHA standards for battery charging operations before assigning these cartridges.
What are common industries that use OV/acid gas/P100 combination cartridges?
Common applications include chemical processing, metal finishing and electroplating, wastewater treatment (chlorine and SO₂ handling), semiconductor manufacturing, laboratory work involving acid and solvent exposure, and certain industrial cleaning operations. Always validate cartridge selection against SDS and air monitoring data for your specific process.
Can I use an OV/acid gas cartridge in IDLH atmospheres?
No. Air-purifying respirators including OV/AG/P100 combination cartridges cannot be used in IDLH atmospheres. IDLH environments require supplied-air respirators (SAR) or SCBA. Always verify contaminant concentrations are below IDLH before assigning air-purifying respiratory protection.
Written by Steven Eaton — WC Safety Editorial
Steven Eaton is a safety equipment specialist and authorized distributor for 3M and MSA. WC Safety serves industrial safety managers and procurement buyers across North America.
Methodology: Product specifications sourced from NIOSH approval labels, 3M and MSA published datasheets, and authorized distributor product documentation. Acid gas coverage verified against published product approvals. No specifications were estimated or interpolated. Pricing noted as approximate at time of publication and subject to change.
Affiliate Disclosure: WC Safety is an Amazon Associates affiliate. Links marked with Amazon buttons earn a commission on qualifying purchases at no additional cost to the buyer. Affiliate relationships do not influence product recommendations or editorial conclusions.
Editorial Independence: WC Safety is an authorized distributor of both MSA and 3M products. Product comparisons reflect documented specifications and real-world application guidance, not promotional agreements.