... 0.2% max SGS inspection reliable quality fertilizer ammonium sulphate (AMS 20.5) Granular Moisture:1.5% maxFree Acidity:0. ... ) Product nameAmmonium SulphateOther namesAmmonium Sulfate,AS,SOA, Amsul,SA,ZA,AMS(MF)Molecular formula(NH4)2SO4Molecular weight132.14CAS No.7783-20 ... --Heavy metal( Pb)content,% ≤0.005--insoluble matter % ≤0.01--Note: When ammonium sulfate is used as fertilizer in agriculture ...