Stannous sulfate

Stannous sulfate (CAS 7488-55-3), also known as tin(II) sulfate, is an inorganic tin salt used primarily as a source of stannous ions in electroplating baths and surface finishing processes.

Where is Stannous sulfate used?

• Electronics and printed circuit board manufacturing: key electrolyte component
• Acid tin plating baths: deposits uniform tin coatings on copper substrates for solderability and corrosion resistance
• Textile and leather processing: mordant and reducing agent that fixes dyes and improves color fastness on natural fibers
• Printing and packaging: supports tin-based electrodeposition on metal substrates for food-grade packaging
• Polymer synthesis and organic esterification: catalyst precursor where controlled stannous ion activity is required
• It functions as a catalyst and surface modification agent in specialty chemical applications.

Good to know: High-purity grades are available for electronics and plating applications where strict tin content is necessary; these grades ensure low heavy metal impurity specifications are met for sensitive industrial processes.

Commercial specifications

• Purity levels typically ranging from 95% to 99%+