Type of front-mounted or back-mounted gas mask: |
Acid gas1 2 3 |
Ammonia |
Carbon monoxide |
Organic Vapor1 2 3 |
Other gas(es) and vapor(s)1 2 3 |
Combination of two or more of the above gases and vapors.1 2 3 |
Combination of acid gas, ammonia, carbon monoxide, and organic vapors.1 2 3 |
Type of chin-style gas mask: |
Acid gas1 2 3 |
Ammonia |
Carbon monoxide |
Organic vapor1 2 3 |
Other gas(es) and vapor1 2 3 |
Combination of two or more of the above gases and vapors.1 2 3 |
Type of escape gas mask: |
Acid gas1 2 3 4 |
Ammonia4 |
Carbon monoxide |
Organic vapor1 2 3 4 |
Other gas(s) and vapor(s)1 2 3 4 |
Combination of two or more of the above gases and vapors.1 2 3 4 |
1 Approval may be for acid gases or organic vapors as a class or for specific acid gases or organic vapors.
2 Not for use against gases or vapors with poor warning properties (except where MSHA or Occupational Safety and Health Administration standards permit such use for a specific gas or vapor), or those which generate high heats or reaction with sorbent materials in the canister.
3 Use of the gas mask may be limited by factors such as lower explosive limit, toxicological effects, and facepiece fit. Limitations on gas mask service life and sorbent capacity limitations shall be specified by the applicant in instructions for selection, use and maintenance of the gas mask.
4 Eye protection may be required in certain concentrations of gases and vapors.
42 C.F.R. §84.110