... -55-3Specifications:1) Stannous sulphate SnSO42) Appearance: white crystal3) Assay: 99.2% min.4) Fe: 0.008% max.5) As: 0 ... , BOZ, chloral hydrate, DEP, POPDH, PABS, PAP, PA, PME, POPS, PS, PN, PPS-OH 40% and 45%, PPSb) For copper plating ... .: 7488-55-3)d) Stannous fluoride Stannous Sulphate white crystal 99.2% min.