Disodium 2-naphthol-3,6-disulfonate CAS NO.135-51-3 M.F:C10H6O7S2Na2 MW:348.25 Appearance:off-white powder Disodium 2-naphthol-3,6-disulfonateCAS NO.135-51-3M.F:C10H6O7S2Na2MW:348.25Appearance:off-white powderPurity:80%minUsed for:Dyestuffs Disodium 2-naphthol-3,6-disulfonate/135-51-3