As mildew inhibitor, preservative and bactericide, it can resist high temperature and don't decompose. It is widely used in food, tobacco and pharmaceutical industry and can be also used in butyl rubber to prevent aging and extend service life.                                       1) Appearance: White crystalline powder                                                                       2) Assay (dry basis): 99.0 %min
3) Water insolubles: 0.3% max
4) Fluoride(F): 0.003% max
5) Moisture content(120,2h): 9.5% max
6) Heavy metals (as Pb): 10ppm (max.)
7) Arsenic (as As): 3ppm                                                                                                                                  8) Free acid: Comply with the standard                                                                                                         9) PH(1%solution): 7.0~9.0
Packing: 25KG/bag .