42 CFR § 84.191
Chemical cartridge respirators; required components
June 11, 2020
(a) Each chemical cartridge respirator described in §84.190 shall, where its design requires, contain the following component parts:
(1) Facepiece, mouthpiece, and noseclip, hood, or helmet;
(2) Cartridge;
(3) Cartridge with filter;
(4) Harness;
(5) Breathing tube; and
(6) Attached blower.
(b) The components of each chemical cartridge respirator shall meet the minimum construction requirements set forth in subpart G of this part.