Ammonium chloride 99.5% tech grade molecular formula:NH4Cl, molecular weight:53.49, appearance: white crystal, assay(as dry basis):99.5%min, N:25.3%min, heavy metal(as Pb):0.0005%max, Fe:0.0005%max, moisture:0.5%max, SO4:0.02%max, residue after ignition:0.4%max, PH:4.0-5.5 packing:25kgs plastic woven bags, 21.5mts/20'fcl