U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 28, 2025

All TitlesTitle 42Chapter IPart 84Subpart I - Subpart I—Gas Masks
§ 84.110 - Gas masks; description.
§ 84.111 - Gas masks; required components.
§ 84.112 - Canisters and cartridges in parallel; resistance requirements.
§ 84.113 - Canisters and cartridges; color and markings; requirements.
§ 84.114 - Filters used with canisters and cartridges; location; replacement.
§ 84.115 - Breathing tubes; minimum requirements.
§ 84.116 - Harnesses; installation and construction; minimum requirements.
§ 84.117 - Gas mask containers; minimum requirements.
§ 84.118 - Half-mask facepieces, full facepieces, and mouthpieces; fit; minimum requirements.
§ 84.119 - Facepieces; eyepieces; minimum requirements.
§ 84.120 - Inhalation and exhalation valves; minimum requirements.
§ 84.121 - Head harnesses; minimum requirements.
§ 84.122 - Breathing resistance test; minimum requirements.
§ 84.123 - Exhalation valve leakage test.
§ 84.124 - Facepiece tests; minimum requirements.
§ 84.125 - Particulate tests; canisters containing particulate filters; minimum requirements.
§ 84.126 - Canister bench tests; minimum requirements.
Appendix - Tables to Subpart I of Part 84
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