Guides

Acid gases — chlorine, hydrogen chloride, sulfur dioxide and chlorine dioxide — come from water treatment, chemical processing, battery rooms and acid-catalyzed coatings. This guide ranks the best 3M acid-gas cartridges, led by the 60923 OV/acid-gas/P100, with the gas-only 6003 and pure-acid 6002 as alternatives.

Solvents, paint thinners, degreasers and adhesives off-gas organic vapor (OV). This guide ranks the best 3M OV cartridges — the 6001 gas-only standard, the 60921 OV/P100 combo, and the rest — and shows exactly when you need a particulate prefilter and which 3M masks they fit.

By Steven Eaton, WC Safety Editorial — Updated June 10, 2026 — Read the Moldex 7300 full review