This acid gas/P100 cartridge works with the 3M Respirators. Can provide protection against contaminants up to 10 times the permissible exposure level PEL when used with half facepiece respirators or up to 50 times the PEL when used with full facepiece respirators. Approved for: Chlorine/Hydrogen Chloride/Sulfur Dioxide/Chlorine Dioxide/Hydrogen Sulfide escape only/P100.