A workhorse industrial reagent for leather tanning, mining flotation, textile dyeing, and pulp & paper. Supplied in 25 kg bags, HDPE drums, and FIBC jumbo bags — exported to 40+ countries.
- Purity
- 98%+
- Min order
- 1 MT
- Export to
- 40+ countries
Where Na₂S·9H₂O is used
From tanneries to mining concentrators, sodium sulfide nonahydrate underpins core industrial chemistry.
Leather Tanning
Dehairing of hides and skins — the largest single-use of sodium sulfide nonahydrate in the leather industry.
Mining & Flotation
Activator and depressant in the flotation of copper, lead, zinc, and antimony sulfide ores.
Textile Dyeing
Reducing agent for sulfur and vat dyes — produces deep, color-fast shades on cotton fabrics.
Pulp & Paper
Core reagent in the Kraft pulping process to break lignin bonds and free cellulose fibers.
Chemical Synthesis
Intermediate for sulfur dyes, rubber chemicals, polysulfides, thiols, and sodium thiosulfate.
Water & Effluent Treatment
Precipitates heavy metals (Cu, Pb, Hg, Cd) from industrial wastewater as insoluble sulfides.
Product specification
Technical data sheet for our standard industrial grade. Custom specs available on request.
| Chemical name | Sodium Sulfide Nonahydrate |
| Formula | Na₂S · 9H₂O |
| CAS Number | 1313-84-4 |
| EINECS | 215-211-5 |
| Molecular weight | 240.18 g/mol |
| Appearance | Off-white to light grey / light green crystalline solid |
| Purity (Na₂S) | ≥ 30% (nonahydrate basis) |
| Melting point | 50 °C |
| Boiling point | 920 °C (decomposes) |
| Density | 1.43 g/cm³ |
| Solubility in water | Very soluble — alkaline solution |
| pH (5% solution) | 12 – 13 |
| Hazard class | UN 1849 · Class 8 |
Shipping & packaging options
Moisture-resistant, palletized, ready for sea or air freight.
25 kg PP bags
Woven polypropylene bags with PE inner liner, palletized 1,000 kg.
50 kg HDPE drums
Sealed HDPE drums for moisture-sensitive shipments and air freight.
1,000 kg jumbo bags
FIBC big-bags with discharge spout for bulk industrial use.
Custom OEM
Private-label and customer-specified packing for re-export markets.
Global market footprint
Sodium sulfide nonahydrate sees consistent global demand driven by leather, mining, and textile sectors.
South & Southeast Asia
India, Bangladesh, Vietnam, Indonesia — leather & textile clusters
Middle East & Africa
Egypt, Turkey, Nigeria, Ethiopia — tanneries & mining
Latin America
Brazil, Mexico, Peru, Chile — mining flotation demand
Europe & CIS
Italy, Spain, Russia — specialty chemical & dye industries
Ready to order or need a quote?
Place an online order with your shipping terms, or send a custom inquiry for tailored grades, packing, and freight options.