This standard will assist you in the identification of air-purifying respirator canisters, cartridges, and filters used to provide respiratory protection against gases, vapors, or particles. Manufacturers, users, and governmental regulatory agencies will find accurate and rapid identification of selected industrial respiratory protective devices.

**PLEASE NOTE** ASSE is now the secretariat for this standard All questions on content should be directed to Tim Fisher at ASSE (847) 768-3411 or TFisher@asse.org.