Reference

Every respirator cartridge carries a label that tells you what it protects against, whether it is certified, and when to discard it - if you can read it. This guide decodes the ANSI/ISEA 110 color bands, the OV, AG, and P100 designations, the NIOSH TC approval number, and the ESLI and expiration date markings clearly explained.

Smelling chemicals through a respirator means protection has failed. Wrong cartridge type is the most common cause — a P100 filter blocks particles, not vapors. This guide covers cartridge type selection, OSHA 1910.134 service-life compliance, ESLI vs. written schedules, seal failure diagnosis, and a spray painting worked example.