... Industrial grade:(GB 2946-92) INSPECTION ITEMUNITFIRST GRADEREGULAR GRADEAmmonium chloride(As NH4Cl)%Min99.599.0Moisture%Max0.71.00Iron%Max0.0010 ... sulphide,Sodium hydrosulphide,Oxalic acid,Formic acid,Calcium formate,Zinc chloride,Ammonium bicarbonate,Sodium metabisulphite,Alum,Aluminium sulphate,Soda ash,Causic ... will always meet our prompt reply! Best regardsSally high quality Ammonium Chloride