... food industry: food fermentation,processing, submerged aquatic stains, food preservatives and additives. The chemical industry: water purification flocculants, paper sizing, ... place, far away from heat, avoid nsolation, sign with no moisture and no insolation. ItemIndexAluminium ammonium sulphate99.5%minFe0.05%maxPb0 ... ROAD 2,RIZHAO, SHANDONG, CHINA - POST CODE : 276826 Alum(good quality&hot sales)