Hover to zoomSodium Sulfide Nonahydrate
Na₂S · 9H₂O — off-white to light grey / light green crystalline solid
A versatile inorganic reagent used worldwide in leather, mining, textile and pulp industries. Supplied in 25 kg bags, HDPE drums and FIBC jumbo bags, with global export-ready documentation.
- Purity
- 98%+
- MOQ
- 1 MT
- Lead time
- In stock
Industrial uses of Na₂S·9H₂O
Sodium sulfide nonahydrate is a workhorse reagent across six core industries.
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.
Technical specification
Standard industrial grade. Custom specs and certificate of analysis (COA) available on request.
Identification
- Chemical name
- Sodium Sulfide Nonahydrate
- Synonyms
- Disodium sulfide nonahydrate, Sodium sulphide hydrate
- Formula
- Na₂S · 9H₂O
- CAS · EINECS
- 1313-84-4 · 215-211-5
- HS Code
- 2830.10
Composition & Assay
- Assay
- ≥ 98% (typical 99.6%)
- Moisture (KF)
- 67.5 – 72.0% (typical 69.67%)
- Ammonium (NH₄)
- ≤ 0.005%
- Sulfite & thiosulfate (as SO₄)
- ≤ 0.1%
- Molar mass
- 240.17 g/mol
Physical Properties
- Appearance
- Off-white to light grey / light green crystalline solid
- Melting point
- 50 °C
- Boiling point
- 920 °C (decomposes)
- Density
- 1.43 g/cm³
- Solubility
- Very soluble in water — alkaline solution
- pH (5% solution)
- 12 – 13
Handling & Shipping
- Storage
- 20–25 °C, sealed, away from acids & oxidizers
- Shipping conditions
- Ambient
- Retest period
- Up to 36 months (sealed)
- Hazard class
- UN 1849 · Class 8 (Corrosive)
Shipping & packaging options
Moisture-resistant, palletized and labeled per IMDG / DOT requirements.
25 kg PP bags
Woven polypropylene bags with PE inner liner, palletized 1,000 kg per pallet, shrink-wrapped.
50 kg HDPE drums
Sealed HDPE drums for moisture-sensitive shipments and air freight — 20 drums per pallet.
1,000 kg jumbo bags
FIBC big-bags with discharge spout for bulk industrial use — single trip, UV-resistant.
Custom OEM
Private-label and customer-specified packing for re-export and trader markets.
Global market footprint
Consistent demand from leather, mining, textile and chemical sectors across 40+ countries.
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
Frequently asked questions
Quick answers about applications, packing, pricing and export logistics for Sodium Sulfide Nonahydrate.
What are the main applications of Sodium Sulfide Nonahydrate?+
Na₂S·9H₂O is used primarily for leather dehairing, mineral flotation (copper, lead, zinc, antimony sulfide ores), as a reducing agent for sulfur and vat dyes in textile printing, in the Kraft pulp & paper process, as an intermediate in chemical synthesis, and to precipitate heavy metals from industrial effluent.
What packing is available for Sodium Sulfide Nonahydrate?+
We supply 25 kg woven PP bags with PE inner liner (palletized 1,000 kg), 50 kg sealed HDPE drums for moisture-sensitive shipments, 1,000 kg FIBC jumbo bags for bulk industrial use, and private-label OEM packing on request.
What is the price of Sodium Sulfide Nonahydrate?+
Indicative FOB prices range from $420–$480/MT for industrial 30%, $640–$720/MT for industrial 60% flakes, $780–$860/MT for high-purity 60% (low iron) and $700–$770/MT for textile/dye grade. Prices vary with grade, packing, freight terms and prevailing market conditions — request a live quotation.
What is the CAS number and chemical formula?+
CAS Number is 1313-84-4 and the molecular formula is Na₂S·9H₂O (sodium sulfide nonahydrate), molecular weight 240.18 g/mol, EINECS 215-211-5, HS Code 2830.10.
Is Sodium Sulfide Nonahydrate considered hazardous for shipping?+
Yes. It is classified UN 1849, Class 8 (Corrosive) for international transport. We supply IMO declaration, MSDS, COA and IMDG-compliant labeling for sea and air freight.
What is the minimum order quantity and lead time?+
Minimum order quantity is 1 MT for bulk grades. Standard lead time is 7–14 days from confirmed purchase order, FOB Nhava Sheva / Mundra / Chennai.