... N : 20.8% min 3, industrial and fertilizer grade 4, Competitive price --Ammonium sulphate fertilizer and industry gradeSpecs : N : 21% min ... -1995)Its advantage is less absorb moisture compared to other fertilizer, also use in industry pharmaceuticals textiles welding industry , dyeing ... leather , beer making chemical agent ,storage battery marking compound fertilizer Ammonium sulphate 20.5%,20.8%,21%