3M cartridge/filter 60923, organic vapor/acid gas/P100 when properly fitted on 3M half & full face pieces 6000 series and 3M half & full face pieces 7000 series with bayonet style cartridge holders, helps provide respiratory protection from certain organic vapors, chlorine, hydrogen chloride, sulfur dioxide, or hydrogen sulfide or hydrogen fluoride & particulates at concentrations up to 10 times the permissible exposure limit (PEL) with half face pieces or 50 times PEL with full face pieces.