Sps(bis-(sodium sulfopropyl)-disulfide) Cas: 27206-35-5 Trade name: sps(sp) Chemical name: bis-(sodium sulfopropyl)-disulfide Other name: sps 1-propanesulfonicacid, 3, 3-dithiobis-, disodium salt 3, 3-dithiobis-1-propanesulfonicacidisodiumsalt Mf: c6h12na2o6s4 Mw: 354.4 Einecs: 248-324-3 Hs:2930909090 Molecular formula: c6h12o6s4(na)2 Assay: 90% Appearance: white or yellowish powder Application: as a brightening agent for acid copper baths for decorative and functional deposits, it is functionally compatible with most components of typical copper bath formulation such as non-ionic surfactants, polymeric amines and other mercapto compounds