Purity: 98.5%min white crystlline. HS NO.2833.4000, UN NO.1444, CLASS 5.1, SGS passed Other ... as main ingredient of whitening formula of consmetic(6)Others:also used in food,photo,storage batteryindustry. ... from fire, or may happen decompound and explosion. No mixed with inflammable matter, explosive matter and reductive matter ... sunlight and moisture. Ammonium persulfate (NH4)2S2O8 CAS NO# 7727-54-0