Antimony Trisulfide
Diantimony Trisulfide, Black Antimony
- CAS
- 1345-04-6
- EC
- 215-713-4
- Sectors
- Rubber & Elastomers, Automotive, Aerospace & Defense
Antimony trisulfide (Sb₂S₃) is a gray to black powder used as a friction modifier and in pyrotechnics. It exhibits semiconducting properties and stable frictional performance at elevated temperatures.
Typical Properties
| Molecular formula | S3Sb2 |
|---|---|
| Molecular weight | 339.71 g/mol |
| Appearance | black powder |
| Form | powder |
| Color | Dark gray to black |
| Melting point | 550 °C |
| Boiling point | 1013 °C |
| Density | 4.562 g/cm³ |
| Water solubility | Soluble in concentrated acids. Insoluble in water. |
| GHS signal word | Danger · Irritant / harmful, Health hazard, Environmental hazard |
| HS code | 28309020 |
| 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.
Antimony Trisulfide
Applications
Used in brake linings, matches, fireworks, and military primers. Also serves as a component in glass and ceramic formulations to control color.
Safety & Risks
Dust may irritate eyes, skin, and lungs. Avoid open flames and strong oxidizers due to possible ignition under extreme heat.
Packaging
25 kg multiwall bags with PE liners or steel drums. Store sealed in cool, dry, well-ventilated spaces.