... and leather industry;used in fertilizer,dying, chemical, leather, the raw material of ammonium persulfate,adjuvant, glufosinate ,herbicides ... not damage the packing bags.Technical specifications of Ammonium Sulphate( National Standard GB535-1995) ItemSupreme gradeFirst gradeQualified ... mechanical impurityno visible mechanical impurityN content(dry basis),% ≥21.021.020.5Water content(H2O),% ≤0.20. ...