Purity: 98.5%min white crystlline. HS NO.2833.4000, UN NO.1444, CLASS 5.1, SGS passed Other Names: ammonium persulfate (1) for metal surface cleaning and pickling. (2) low concentration of formalin used to accelerate the processing of adhesives. (3) is the production of starch modifier, and applied binder and coating production. (4) for the purification of ammonium sulfate. (5) is the basic ...