The TR-6590N cartridge is a combination high efficiency particulate/multi-gas cartridge for use with 3M Versaflo powered air purifying respirators TR-600 and TR-800 series systems. This filter/cartridge is suitable for certain particulates, mercury, certain organic vapours, chlorine dioxide, chlorine, hydrogen chloride, sulfur dioxide, ammonia, methylamine, and/or hydrogen fluoride. This filter/cartridge is NIOSH approved for use against the broadest range of airborne contaminants of any 3M Versalfo cartridge.