... PH value:6-8 About us : Qingdao Central Chemical Co., Ltd. locates in Qingdao,the beautiful seaside city ,which engages in ... technical developers specializing in the research of those chemicals.With the consistent quality ,reliable technical performance and competitive price,gains ... (Fe) content, %<0.00150.008moisture, %<0.100.30whiteness, % min8680 Manufacturer of Sodium Sulphate Anhyrous(SSA)99%