... min 99%, White content purity min 88%, Industrial Grade, PH value:6-8 About us : Qingdao ... seaside city ,which engages in the manufacturing and marketing of Sodium sulfate , Cryolite , Soda ash , Edible alkali ... export to North America,Asia and Europe .Our factory covers an area more than 50,000 aquare ... .00150.008moisture, %<0.100.30whiteness, % min8680 The factory of Sodium Sulphate Anhyrous(SSA)99%