ammonium chloride ammonium chloride cas:122-19-0 formula:nh4cl m.w.: 53.49(according to international atomic weight in 1995) the product accords with the national standard of gb2946-92 gb/t19902-1994 idt iso9002:1994 standard registration number:sc07 date:17.04.1998 specification: nh4cl(as dry basis),% 99.5min fe,% 0.0009max moisture,% 0.5max pb,% 0.0005max sulphate(so4-),% 0.02max residue in ignition,% 0.4max ph value 4.0-5.5 with anti-caking agent appearance: white powder crystals packing: 25kgs net in pp/pe bag.