full or half activated carbon gas mask respirator filter

Canister protection type

Protective gas

For example

Remarks

New model

Old model

Brown

A

3#

Organic gas or steam

Benzene,anilines,carbon tetrachloride,nitrobenzene, chlorpicrin

Common types

Green

K

4#

Ammonia and organic derivatives of ammonia  

Ammonia

Yellow

E

7#

SO2 ,other acid gas or steam

SO2

White

CO

5#

CO

CO

Confirm the gas type before using

Red

HG

6#

Mercury vapor

Mercury

Blue

H2S

8#

H2S

H2S

Gray

B

1#

Inorganic gas or steam

Hydrogen chloride,Hydrocyanic acid,Chlorine