Sodium benzenesulphinate CAS NO.: 873-55-2 Molecular formula: C6H5NaO2S?H2O Appearance: white crystal powder Content: >=98% PH: 6.5-8 Chloride: <=0.5% Sodium sulphate: <=0.5% Heavy metal: <=10ppm Iron: <=10ppm Clarify: Pass Solution: Pass Subsulphuric acid: pass Thiophenol: Pass Packing: 25Kg weave bag