Sodium Sulfide
Sodium Monosulfide, Sodium Salt of Sulfur
- CAS
- 1313-82-2
- EC
- 215-211-5
- Sectors
- Textiles, Leather & Paper, Mining & Metals, Water & Wastewater Treatment
Sodium Sulfide (CAS 1313-82-2), also called the sodium salt of sulfur, is an inorganic sulfur compound that appears as yellow crystals or flakes with a strong, repulsive odor, and it is used in dye production, leather processing, pulp and paper, ore flotation and water treatment. Density 1.86 g/cm³, melting point 950°C; soluble in water releasing H2S, strong rotten egg odor. Hygroscopic; produced by reducing sodium sulfate with carbon.
Typical Properties
| Molecular formula | Na2S |
|---|---|
| Molecular weight | 78.04 g/mol |
| Appearance | crystals of varied colour, with a repulsive odour |
| Form | flakes |
| Color | Yellow |
| Odor | Rotten egg odor |
| Melting point | 83 °C |
| Density | 1.856 g/cm³ @ Temp: 14 °C |
| Water solubility | 186 g/L (20 °C) |
| GHS signal word | Danger · Flammable, Corrosive, Acute toxicity, Irritant / harmful, Health hazard, Environmental hazard |
| HS code | 28301010 |
| 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.
Sodium Sulfide
Applications
Used in dyes production, leather processing, pulp and paper, mining for ore flotation, and water treatment.
Safety & Risks
Corrosive to eyes, skin, respiratory tract; toxic on ingestion. Flammable; releases H2S with acids; Hazard Class 8.
Packaging
In 25kg bags or drums with liners; store airtight; dispose rinsed containers in landfills.