Guides

North 7581P100L vs 3M 60921 compared: two organic vapor/P100 cartridges with near-identical solvent-plus-particulate protection on two incompatible respirator platforms. Which fits your mask, ecosystem-by-ecosystem picks, when to step up to multi-gas or down to gas-only, and a 15-question FAQ.

Both the Honeywell North 7580P100 and the 3M 2091 are NIOSH-approved P100 particulate filters at 99.97% efficiency. However, they use incompatible proprietary mounts and cannot be interchanged - the 7580P100 fits Honeywell North 7700 and 5500 series half masks only, while the 3M 2091 fits 3M 6000, 6500, and 7500.

3M P95 vs P100: Both P95 and P100 are oil-resistant particulate filters under NIOSH's classification. P95 captures at least 95% of airborne particles. P100 captures at least 99.97% and is color-coded magenta. For many general industrial applications, P95 is sufficient.

The 3M 6001 is an organic vapor-only cartridge with no P100 particulate protection. The 3M 6003 adds acid gas coverage for OV plus organic acid environments. Neither cartridge includes a P100 filter - pair with 3M 2091 prefilters for combined particulate protection.

The 3M 60923 covers organic vapor, acid gas, and P100 particulates. The 3M 60926 adds hydrogen fluoride (HF) and chlorine dioxide protection - required for semiconductor fabrication, glass etching, and chemical plants handling fluorine compounds.

The 3M 60921 provides organic vapor plus P100 particulate protection. The 3M 60923 adds acid gas protection for HCl, SO2, and Cl2 - critical for chemical processing and industrial cleaning environments. This guide compares protection levels, NIOSH approvals, and job-specific selection.

The 3M 2091 is a pure P100 particulate filter at 99.97% efficiency. The 3M 2097 adds a thin activated carbon layer for nuisance-level organic vapor relief - it is NOT a full OV cartridge. This guide explains when each filter is appropriate, OSHA requirements by hazard, and which respirator half masks they fit.

The complete 3M respirator filter and cartridge guide: protection charts, head-to-head comparison tables, and real-world job-site recommendations for every working environment.

All 17 Honeywell North respirator cartridges independently reviewed - P100 filters, OV+P100 combos, acid gas, ammonia, mercury vapor (75852P100L), multi-contaminant 75SCP100L, and snap-on N95/R95/N99 prefilters.

Best N95 Respirators 2026: Our top picks for 2026 are the 3M Aura 9205+ (best overall), the Moldex 2200 (best for all-day wear), and the Honeywell DF300 (best for industrial work). Read on for the full breakdown.