Product:ammonium sulphate type:nitrate fertilizer Advantage:by-product of cyanuric acid cas no.:7783-20-0 einecs no.:231-984-1 Molecular formula:(nh4)2so4 inspect standard gb535-1995 Appearance: white crystalline granular Purity: 99%min sulfur content: 23%min nitrogen: 21%min moisture: 1%max Fress acid: 0.2% max water insolubles:0.02% max size: 2-5mm 95% pass Aquapure chemicals limited is a professional producer for fertilizers in china. We produce urea 110, 000mt/year &ammonium sulphate 80, 000mt/year.