... , have convergence, soluble in water, vulnerable to hot, Easy to lose the crystal water and become a white powder.2.Usage: The ... airiness place, far away from heat, avoid nsolation, sign with no moisture and no insolation. ItemIndexAluminium ammonium sulphate99.5%minFe0.05%maxPb0 ... 2,RIZHAO, SHANDONG, CHINA - POST CODE : 276826 Alum(good quality&hot sales)