Overview
Sodium thiocyanate (CAS 540-72-7 ), also known as sodium rhodanide or NaSCN, is an inorganic salt used across chemical manufacturing, textile processing, and life sciences as a reactive intermediate and biocidal agent.
Its thiocyanate anion drives reactivity in synthesis, fiber treatment, and antimicrobial applications. In textile manufacturing, NaSCN functions as a solvent and spinning bath component for polyacrylonitrile fiber production.
This chemical directly influences fiber quality and process yield during manufacturing. Leather and paper processors use it as a preservation and biocide agent to control microbial growth during wet processing stages.
Pharmaceutical and biotech applications rely on sodium thiocyanate as a reagent and buffer component in enzyme assays. It is also utilized in protein denaturation studies and chaotropic salt preparations.
Water treatment operations employ it as a catalyst precursor and process chemical in specific treatment chemistries. Sodium thiocyanate is supplied as a white crystalline powder or as an aqueous solution.
Solution concentrations typically range from 50% to 58% by weight for industrial use. Technical grade is the most common commercial form, with higher-purity grades available to meet specific requirements.
These high-purity options are designed to meet pharmaceutical and laboratory specifications. Bulk quantities are standard for industrial buyers, with smaller packaging available for research and specialty use.
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Physical Properties
| Melting Point | 300 °C |
| Boiling Point | >400° |
| Density | 1.7 g/cm³ |
| Appearance | white crystalline powder |
| Color | White |
| Odor | Odorless |
| Form | Solid |
| Water Solubility | 139 g/100 mL (21 ºC) |
| Vapor Pressure | <1 hPa (20 °C) |
| Refractive Index | 1.545 |
| pH | 6-8 (100g/l, H2O, 20℃) |
| Log P | 0.58 |
Safety & Handling
Danger GHS05 GHS07 GHS08 Hazard Statements H302 Harmful if swallowed H312 Harmful in contact with skin H318 Causes serious eye damage H319 Causes serious eye irritation H332 Harmful if inhaled H372 Causes damage to organs through prolonged or repeated exposure H412 Harmful to aquatic life with long lasting effects H302+H312+H332 Harmful if swallowed, in contact with skin or if inhaled 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. P270 Do not eat, drink or smoke when using this product. 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. P317 Get emergency medical help. P319 Get medical advice/attention if you feel unwell. P321 Specific treatment (see … on this label). P330 Rinse mouth. P501 Dispose of contents/container in accordance with local regulations. P264+P265 Wash … thoroughly after handling. P301+P317 Get emergency medical help. P302+P352 IF ON SKIN: Wash with plenty of water. 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. P362+P364 Take off contaminated clothing and wash it before reuse. 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 | 28429011 |
| Storage Class | 13 - Non Combustible Solids |
| WGK (Germany) | 1 |
Other Names
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Chemical Properties
- CAS Number
- 540-72-7
- EC Number
- 630-465-0
- Mol. Weight
- 81.07
- HS Code
- 28429011
- Category
- Catalysts & Catalyst Precursors