Overview
Sodium stannate trihydrate (CAS 12027-70-2 ), also sold as sodium stannate, is an inorganic tin salt used industrially as a corrosion inhibitor, flame retardant additive, and surface treatment agent.
It functions by depositing tin-based compounds onto substrates or into formulations to modify surface chemistry and improve material performance across various industrial sectors.
In electroplating and electronics manufacturing, it serves as a tin source in alkaline plating baths, producing uniform, solderable tin coatings on metal components and circuits.
Textile processors apply it as a mordant and flame-retardant treatment for natural fibers, particularly wool, improving both dye fixation and fire resistance in a single process step.
In water treatment, it acts as a corrosion inhibitor for metal pipework and industrial cooling systems. Paper and packaging manufacturers use it as a surface sizing agent.
In specialty coatings, controlled tin deposition improves barrier properties. Sodium stannate trihydrate is supplied as a white crystalline powder or granular solid for easy handling.
Technical and industrial grades are the most common commercial forms, with purity levels typically specified at 95% or higher to ensure consistent performance in chemical processes.
Packaging ranges from small drums to bulk quantities depending on application volume requirements. Proper storage in a cool, dry environment is recommended to maintain product stability.
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Physical Properties
| Density | 2.759[at 20℃] |
| Water Solubility | 312.14g/L at 20℃ |
Safety & Handling
Danger GHS05 GHS07 Hazard Statements H314 Causes severe skin burns and eye damage H315 Causes skin irritation H318 Causes serious eye damage H319 Causes serious eye irritation H335 May cause respiratory irritation H412 Harmful to aquatic life with long lasting effects Precautionary Statements P260 Do not breathe dust/fume/gas/mist/vapours/spray. P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P264 Wash … thoroughly after handling. P271 Use only outdoors or in a well-ventilated area. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P316 Get emergency medical help immediately. P317 Get emergency medical help. P319 Get medical advice/attention if you feel unwell. P321 Specific treatment (see … on this label). P363 Wash contaminated clothing before reuse. 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. P301+P330+P331 Rinse mouth. Do NOT induce vomiting. P302+P361+P354 IF ON SKIN: Take off immediately all contaminated clothing. Rinse skin with water/shower. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P305+P354+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Trade & Regulatory
| WGK (Germany) | 3 |
Other Names
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Chemical Properties
- CAS Number
- 12027-70-2
- EC Number
- 234-724-5
- Mol. Weight
- 266.73
- Category
- Inorganic Acids