... Co., Ltd. locates in Qingdao,the beautiful seaside city ,which engages in the manufacturing and marketing of Sodium sulfate , Cryolite , Soda ... have experts and technical developers specializing in the research of those chemicals.With the consistent quality ,reliable technical performance and ... , %<0.00150.008moisture, %<0.100.30whiteness, % min8680 The specification of Sodium Sulphate Anhyrous99%