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Table I-1

Atmospheric contaminants to be protected against Colors assigned*
Acid gases ... White.

Hydrocyanic acid gas ... White with ½-inch green strip completely
around the canister near the bottom.

Chlorine gas ... White with ½- inch yellow stripe

completely around the canister near the
bottom.
Organic vapors ... Black.

Ammonia gas ... Green.

Acid gases and ammonia gas ... Green with ½-inch white stripe completely
around the canister near the bottom.
Carbon monoxide ... Blue.

Acid gases and organic vapors ... Yellow.

Hydrocyanic acid gas and chloropicrin vapor ... Yellow with ½-inch blue stripe completely
around the canister near the bottom.

Acid gases, organic vapors, and ammonia gases ... Brown.
Radioactive materials, excepting tritium and...

noble gases ... Purple (Magenta).
Particulates (dusts, fumes, mists, fogs, or smokes)

in combination with any of the above gases or Canister color for contaminant, as
vapors ... designated above, with ½-inch gray stripe

completely around the canister near the
top.

All of the above atmospheric contaminants ... Red with ½-inch gray stripe completely
around the canister near the top.

*Gray shall not be assigned as the main color for a canister designed to remove acids or vapors.

NOTE: Orange shall be used as a complete body, or stripe color to represent gases not included in this table. The
user will need to refer to the canister label to determine the degree of protection the canister will afford.

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