UPS (3-(amidinothio)-1-propanesulfonic acid)[CAS NO:21668-81-5] Product name:UPS Chemical name:3-(amidinothio)-1-propanesulfonic acid Molecular formula:C4H10N2O3S2 CAS NO:21668-81-5 HS:2930909090 Purity:95% Appearance:White powder Applicationï¼?This product can be used together with polyvinyl alcohol or nonionic surfactant in acidic copper plating can get provide bright copper layer with good ductility. Also can be used in other acidic electroplating solution, such as acidic silver plating and palladium plating.