Stannous sulphate CAS No: 7488-55-3 Molecular formula: SnSO4 Content: 99.2% min. Stannous sulphate 1)CAS No: 7488-55-3 2)Molecular formula: SnSO4 3)Appearance: White powder chemical name:Stannous sulphate Content: 99.2% min HCl-insol.Mat: 0.01% max Alkaline Metal & Alkaline Earth Metal: 0.15% max. Fe: 0.008% max As: 0.008% max Packing: Net 25kg/ plastic drum.