Document DMGYOGgnkMVrOezBzL5Kj3mXB

19--Personal Protective Equipment 492 TABLE 19-B CHARACTERISTICS OF GAS MASKS AND THEIR CANISTERS Mask ACID GAS (for protection against gases such as hydrogen sulfide, sul fur dioxide, chlorine, hydro cyanic acid) ORGANIC VAPOR (for protection against vapors such as aniline, benzene, ether, gasoline, carbon tetrachloride, chloropicrin) AMMONIA GAS Type A B C CARBON MONOXIDE D DUST FUMES, MISTS, FOGS AND SMOKES in combination ninth any o1 the above gases or vapors COMBINATION ACID GAS AND ORGANIC VAPOR COMBINATION ACID GAS. ORGANIC VAPOR AND AMMONIA GAS AE, etc AB ABC COMBINATION ACID GAS, AMMONIA GAS AC Max Con of gas (% by ool 2% 2% Color of Canister 1OSHA-NIOSH )! Matenats m Canister Remarks White Black Soda lime or soda lime and activated charcoal Activated charcoal The time of protection de creases rapidly as the con centration of gas in creases (See Notes 1,2, 3. S) (See Notes 1. 2, 3. 5) 3% Green Silica gel or porous (See Note 4) granules impregnated with metallic salts such as those of copper or cobalt 2% Blue Hopcalite The air becomes notice ably warmer as the per centage of carbon mon oxide increases (See Notes 1.2.3) 2% Any of above, Any of above plus me (See Note 6) plus top grey chanical filter stripe 2% acid gases 2% organic vapors 2% acid gas 2% organic vapor 2% ammonia Yellow Brown 2% acid gases 3% ammonia Green with white stripe at bottom Activated charcoal and soda lime Soda lime, activated charcoal and silica gel or impregnated porous granules Soda lime, silica gel or porous granules im pregnated with metal salts such as those of copper or cobalt (See Notes 1,2,3,4) As the number of gases in creases. the service time of the canister decreases (See Notes 1, 2, 3)