3M™ Secure Click™ Multi-Gas/Vapor Cartridge D8006 is NIOSH-approved for use against certain organic vapors, sulfur dioxide, hydrogen chloride, chlorine/ammonia/methylamine/formaldehyde or chlorine dioxide or hydrogen fluoride or hydrogen sulfide when used with approved 3M™ Secure Click™ facepieces. Secure Click™ cartridges utilize dual flow technology for easier breathing.