Product Name: Sodium Sulfide
CAS No: 1313-82-2
Einecs No: 215-211-5
HS Code: 2830101000
Formula: Na2S
Grade Standard: Tech Grade
Appearance: Light yellow flakes
Packaging Details: 25KG/BAG, 1000KG/BAG
Application:
Mining Industry: Sulfidising agent and depressant for base metal ores.
Dye industry: Producing sulfur dyes.
Printing and dyeing industry: As leveling agent for dissolving sulfur dyes.
Leather industry: Depilating raw hides through hydrolysis, making polysulfide for dried hides softening.
Paper industry: As pulping agent.
Textile industry: Denitration of synthetic fibers, reduction of nitrates, and mordant for cotton dyeing.
Pharmaceutical industry: Producing antipyretic drugs such as phenacetin.
Production of sulfides: Sodium thiosulfate, sodium hydrosulfide, and sodium polysulfide.
Specification:
| Item | Range | Unit | Standard | |
|---|---|---|---|---|
| Class I (Low Iron) Yellow Alkali |
Class II (General) Red Alkali |
|||
| Sodium sulfide (Na₂S) | ≥ | ω/% | 60 | 60 |
| Sodium sulfite (Na₂SO₃) | ≤ | ω/% | 1 | – |
| Sodium thiosulfate (Na₂S₂O₃) | ≤ | ω/% | 2.5 | – |
| Iron (Fe) | ≤ | ω/% | 0.002 | 0.015 |
| Water insoluble | ≤ | ω/% | 0.05 | 0.15 |
| Sodium carbonate (Na₂CO₃) | ≤ | ω/% | 2 | 3.5 |
