3M 60921 vs 60923 vs 60926: Which Respirator Cartridge Do You Need? (2026)

Same Mount, Three Levels of Gas Protection — Match the Cartridge to Your Hazard, Not Your Budget

Reviewed by WC Safety Editorial Team — Last updated: June 2026.

Short answer: All three are P100 combination cartridges that mount on the same 3M bayonet respirators. The 60921 covers organic vapor + P100. The 60923 adds acid gas (HCl, Cl2, SO2). The 60926 is the multi-gas cartridge — it adds ammonia, methylamine, formaldehyde, and hydrogen fluoride on top. Pick the lowest tier that fully covers the gases in your hazard assessment.

Selection Rule: OSHA 29 CFR 1910.134 requires cartridge selection to be based on a site-specific hazard assessment. Over-specifying (buying the 60926 "to be safe" when only OV is present) wastes money; under-specifying is a compliance and safety failure. Match the cartridge to the documented hazard. See the full 3M Respirator Filter & Cartridge Guide for the selection methodology.

Quick Comparison: 60921 vs 60923 vs 60926

Prices are approximate street prices and vary by retailer and pack size.

3M 60921 vs 60923 vs 60926: Side by Side

The Protection Hierarchy

These three cartridges are best understood as nested tiers of gas protection on an identical P100 particulate base:

• 60921 — Organic Vapor + P100. The baseline. Solvents, paint thinners, aromatic and aliphatic hydrocarbons, plus 99.97% particulate filtration. No acid-gas capability.
• 60923 — adds Acid Gas. Everything the 60921 covers, plus chlorine, hydrogen chloride, sulfur dioxide, and chlorine dioxide. The right step up when acid-producing chemistry enters the picture.
• 60926 — adds Multi-Gas (ammonia, methylamine, formaldehyde, HF). The broadest 3M bayonet combination cartridge. One cartridge for facilities with several gas hazards at once.

For the cartridge families without the integrated P100 (the 6001 / 6003 / 6006 series), see 3M 6001 vs 6003 and the NIOSH cartridge color chart.

When to Choose Each Cartridge

Choose the 3M 60921 when:

• Your hazard assessment shows organic vapors and particulates but no acid or specialty gases
• Applications: solvent-based spray painting, lacquering, degreasing, resin and adhesive work
• You want the lowest-cost OV/P100 combination cartridge

Choose the 3M 60923 when:

• Acid gases (HCl, Cl2, SO2, ClO2) are present alongside organic vapors
• Applications: chemical processing, wastewater treatment, swimming-pool chemicals, battery handling, acid-catalyzed coatings
• Your SDS sheets list acid gases but not ammonia, formaldehyde, or HF

Choose the 3M 60926 when:

• Ammonia, methylamine, formaldehyde, or hydrogen fluoride appear in your exposure profile
• You want one cartridge that covers a wide mix of gas and vapor hazards without stocking several SKUs
• Applications: refrigeration (ammonia), labs and anatomy/embalming (formaldehyde), semiconductor and metal etching (HF), multi-process plants

Prefer a Head-to-Head? Read the Pairwise Comparisons

This guide covers all three at once. For a deeper two-way breakdown of any pair:

• 3M 60921 vs 60923 — is acid-gas protection worth it?
• 3M 60923 vs 60926 — when do you need multi-gas coverage?
• 3M 60921 vs 60926 — the smallest vs the broadest cartridge.

Compatible Facepieces

All three cartridges use the 3M bayonet mount and fit every 3M half mask respirator in the 6000, 6500, and 7500 series, plus the 6800/6900 full facepieces. For demanding chemical environments, pair them with the 7500 series silicone facepiece, or move to a 3M full face respirator for eye and face protection. Browse all options in half mask respirators.

Frequently Asked Questions