... .Do not damage the packing bags.Technical specifications of Ammonium Sulphate( National Standard GB535-1995) ItemSupreme gradeFirst gradeQualified gradeAppearanceWhite crystal,no ... )content,% ≤0.005--Water insolubles,% ≤0.01--Note: When ammonium sulphate is used in agriculture,it is not necessary to check ... cooperate together in nearest time.Thanks and Best regardsBeryl ammonium sulphate granule