Good Quality Best Service competitive price Molecular formula: Na2S2O4CAS: 7775-14-6EINECS code 234-394-2 Appearance: white crystalline powder. Application: a) As reducer, dye auxiliary in dyeing industry, synthetic and intermediates, b) As bleaching agent of paper pulp in paper making industry c) As deoxidize of rubber and styrene butadiene rubber synthesis, developerin photo-taking industry