3M 6004 Ammonia and Methylamine Cartridges are NIOSH approved against ammonia and methylamine. 3M 6004 Filters for Use with 3M Half and 3M Full Facepieces 6000, 7000 and FF-400 Series with bayonet filter holders. When properly fitted, helps provide respiratory protection from ammonia and methylamine at concentrations up to 10 times the Permissible Exposure Limit (PEL) with 3M half facepiece respirators or 50 times PEL with 3M full facepiece respirators. 3M Full facepiece respirator must be quantitatively fit tested to claim assigned protection factor above 10 in negative pressure mode. Not for use in environments that are immediately dangerous to life or health (IDLH).