Overview
Potassium stannate (CAS 12142-33-5 ), also known as dipotassium stannate, is an inorganic tin salt used primarily as a source of stannate ions in electroplating baths and surface treatment processes.
It enables controlled tin deposition on metal substrates, delivering corrosion-resistant and solderable coatings across several industrial sectors. In electronics manufacturing, it is used in alkaline tin plating baths.
This chemical helps to produce uniform, adherent tin coatings on printed circuit board components and connector parts. Textile processors apply it as a mordant and weighting agent for silk and synthetic fabrics.
These applications help in improving handle and dye uptake during the manufacturing process. In the leather industry, it functions as a surface modifier to enhance adhesion of finishing coats.
Plastics compounders have also evaluated it as a stabilizer additive in select polymer systems where tin-based chemistry is required. It is supplied as a white to off-white crystalline powder or granular solid.
It is available in technical grade for industrial electroplating and surface treatment applications. Packaging typically ranges from kilogram-scale laboratory quantities to bulk industrial quantities.
The product is handled according to strict industrial protocols, with purity specifications commonly stated on a dry-weight basis to ensure consistency for high-precision manufacturing and chemical synthesis.
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Physical Properties
| Melting Point | 140°C (dec.) |
| Density | 3,197 g/cm 3 |
| Color | colorless crystals, crystalline |
| Odor | Odorless |
| Form | colorless crystals |
| Water Solubility | 110.5g/100mL H2O at 15°C; insoluble alcohol [MER06] [KIR83] |
Safety & Handling
Warning GHS07 Hazard Statements H315 Causes skin irritation H319 Causes serious eye irritation H335 May cause respiratory irritation Precautionary Statements P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P264 Wash … thoroughly after handling. P271 Use only outdoors or in a well-ventilated area. P280 Wear protective gloves/protective clothing/eye protection/face protection. P319 Get medical advice/attention if you feel unwell. P321 Specific treatment (see … on this label). P405 Store locked up. P501 Dispose of contents/container in accordance with local regulations. P264+P265 Wash … thoroughly after handling. P302+P352 IF ON SKIN: Wash with plenty of water. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P332+P317 Get emergency medical help. P337+P317 If eye irritation persists: Get medical advice/attention. Get emergency medical help. P362+P364 Take off contaminated clothing and wash it before reuse. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Other Names
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Chemical Properties
- CAS Number
- 12142-33-5
- EC Number
- 235-255-9
- Mol. Weight
- 244.90
- Category
- Salts & Minerals