Overview
Sodium trithiocyanurate (CAS 17766-26-6 ), commercially known as TMT, is the trisodium salt of trithiocyanuric acid used to precipitate and immobilize heavy metal ions in industrial processes.
It reacts selectively with dissolved metals to form stable, insoluble complexes that can be separated from liquid streams. In industrial wastewater treatment, TMT precipitates heavy metals such as mercury and lead.
It also targets cadmium and copper from effluent streams, enabling compliance with discharge limits. Mining and mineral processing operations use it to remove residual metal contaminants from process water.
It is frequently applied to tailings pond runoff and electroplating wastewater where conventional hydroxide precipitation alone fails to meet regulatory thresholds. This ensures safer environmental discharge.
Metal smelting and refining facilities use TMT as a polishing agent in final effluent treatment. This process captures trace dissolved metals that resist other common treatment methods effectively.
Sodium trithiocyanurate is supplied as an aqueous solution, most commonly at 15% concentration. This is the standard commercial form for dosing systems in large scale industrial facilities.
Dry powder form is available for applications requiring concentrated stock preparation or extended shelf storage. Technical grade is the primary specification offered for these industrial uses.
Product quality is typically characterized by active content and heavy metal precipitation efficacy. This ensures the chemical meets the necessary performance standards for heavy metal remediation.
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Physical Properties
| Melting Point | 82-84 °C(lit.) |
| Density | 1.583[at 20℃] |
| Color | light yellow |
| Form | Liquid |
| Water Solubility | 346.15g/L at 22℃ |
| Vapor Pressure | 0Pa at 25℃ |
| Log P | 0.01 at 25℃ |
Safety & Handling
Danger GHS05 GHS07 Hazard Statements H302 Harmful if swallowed H314 Causes severe skin burns and eye damage H318 Causes serious eye damage H319 Causes serious eye irritation Precautionary Statements P260 Do not breathe dust/fume/gas/mist/vapours/spray. P264 Wash … thoroughly after handling. P270 Do not eat, drink or smoke when using this product. P280 Wear protective gloves/protective clothing/eye protection/face protection. P316 Get emergency medical help immediately. P317 Get emergency medical help. P321 Specific treatment (see … on this label). P330 Rinse mouth. 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. P301+P317 Get emergency medical help. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P337+P317 If eye irritation persists: Get medical advice/attention. Get emergency medical help. 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
| HS Code | 29336990 |
| UN Number | 3267 |
| ADR Class | 8 |
| Packing Group | I |
| Storage Class | 11 - Combustible Solids |
| WGK (Germany) | 2 |
Other Names
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Chemical Properties
- CAS Number
- 17766-26-6
- EC Number
- 241-749-5
- Mol. Weight
- 243.2
- HS Code
- 29336990
- Category
- Salts & Minerals