... Stannous sulphateCAS no.: 7488-55-3SnSO4Specifications:1) Stannous sulphate2) Appearance: white crystal3) Assay: 99.2% min.4) Fe: 0.008% max ... , PAP, PA, PME, POPS, PS, PN, PPS-OH 40% and 45%, PPSb) For copper plating: DPS, HI (2-mercapto thiazoline), SPS ... ) Stannous sulphate (CAS no.: 7488-55-3)d) Stannous fluoride. white crystal Stannous Sulphate