Sodium Stannate
Disodium Tin Trioxide, Sodium Tin(IV) Oxide, Sodium Meta-Stannate.
- CAS
- 12058-66-1
- EC
- 235-030-5
- Sectors
- Automotive, Electronics & Solar PV
Sodium Stannate (CAS 12058-66-1) is an inorganic tin salt supplied as a Technical Grade white to light tan crystalline trihydrate or anhydrous powder, valued as a soluble tin source for alkaline tin plating, immersion tinning of aluminum alloys, peroxide stabilization and ceramic pigments. It is a vital source of soluble tin, widely utilized in the surface treatment industry for providing a high-quality tin coating on aluminum and other metals.
The product is highly valued for its role in alkaline tin plating, where it offers excellent throwing power and uniform deposition in complex geometries. Its high purity ensures that the resulting coatings are resistant to corrosion and possess superior solderability for electronic components.
In the textile sector, it functions as a mordant and a fire-retardant additive for natural fibers. Its chemical stability and ability to release tin ions in controlled environments also make it useful as a stabilizer for hydrogen peroxide and as a pigment additive in ceramics.
Typical Properties
| Molecular formula | Na.1/2O3Sn |
|---|---|
| Molecular weight | 212.69 g/mol |
| Appearance | white to light tan crystals with a characteristic odour |
| Form | Crystalline |
| Odor | Odorless |
| Melting point | 140°C |
| Density | 4.68 g/cm³ @ Temp: 25 °C |
| Water solubility | Slightly soluble in water. |
| GHS signal word | Danger · Corrosive, Irritant / harmful |
| Grades available | Technical Grade |
Typical literature values for identification; lot-specific results are stated on the certificate of analysis (COA) and the safety data sheet (SDS) that accompany every delivery.
Sodium Stannate
Applications
- Electroplating: Used as the primary electrolyte in alkaline tin-plating baths for automotive pistons and electronic connectors.
- Surface Treatment: Applied as an immersion tinning agent for aluminum alloys to prevent oxidation and improve bonding properties.
- Hydrogen Peroxide Stabilization: Acts as an effective stabilizer to prevent the catalytic decomposition of peroxide solutions during storage.
Safety & Risks
Classified as a Skin and Eye Irritant. Inhalation of dust can cause respiratory distress; wear Nitrile Gloves, Protective Clothing, and Dust Respirators.
Packaging
25 kg Fiber Drums and 50 kg Steel Drums with inner plastic liners.