Other Names:
Disodium Sulfide, Sodium Sulfuret, Sodium Sulfide Flakes, Na₂S, Sulfurated Soda
Specification Summary
- Purity: 60–62% (Sodium Sulfide 60-58), ≥99% (Anhydrous)
- Form: Yellow to brick-red crystalline flakes, granules, or powder
- CAS No.: 1313-82-2
- Molecular Formula: Na₂S
- Molecular Weight: 78.04 g/mol
Product Description
Sodium Sulfide is a hygroscopic, corrosive solid with a strong alkaline nature. Commercial grades (e.g., Sodium Sulfide 60-58) appear yellow to brick-red due to polysulfide impurities. It is highly soluble in water, forming a strongly alkaline solution (pH >12). The compound reacts violently with acids, releasing toxic hydrogen sulfide (H₂S) gas, and oxidizes in air to form sulfates. Its high reactivity and moisture sensitivity necessitate airtight storage.
Sodium Sulfide Specification Table
| Property | Specification / Value |
| CAS Number | 1313-82-2 |
| Molecular Formula | Na₂S |
| Molecular Weight | 78.04 g/mol |
| Appearance | Yellow-red flakes or crystalline solid |
| Purity (Na₂S) | 60–62% (60-58 Grade) |
| Density | 1.86 g/cm³ (anhydrous) |
| Melting Point | 950°C (anhydrous) |
| Boiling Point | 174°C (decomposes) |
| Solubility in Water | 180 g/100 mL (20°C) |
| pH (1% Solution) | 12–14 |
| Moisture Content | ≤0.5% (anhydrous) |
| Sodium Hydroxide (NaOH) | ≤1.0% (60-58 Grade) |
| Iron (Fe) | ≤50 ppm |
Downloadable TDS
A comprehensive Technical Data Sheet (TDS) is available, detailing chemical properties, safety protocols, and compliance with OSHA, REACH, and EPA standards.
Application Sectors and Industries of Sodium Sulfide
Pulp and Paper Industry
Used in the kraft process to delignify wood pulp, reducing energy consumption during paper production. Enhances pulp brightness and strength.
Leather Processing
Removes hair and fats from animal hides during dehairing and liming. Prepares hides for tanning by breaking down keratin proteins.
Textile Industry
Acts as a reducing agent in sulfur dyeing and printing. Removes oxygen from synthetic fiber production to prevent discoloration.
Water Treatment
Serves as an oxygen scavenger in boiler water systems, preventing corrosion. Neutralizes acidic wastewater and precipitates heavy metals.
Chemical Manufacturing
Key precursor for sodium hydrosulfide (NaSH), thiourea, and sulfur dyes. Used in organic synthesis for desulfurization reactions.
Mining and Ore Processing
Facilitates ore flotation by modifying surface properties of minerals like copper, lead, and zinc. Enhances metal recovery rates.
Petroleum Refining
Removes sulfur compounds from crude oil and natural gas. Regenerates catalysts in hydrodesulfurization (HDS) units.
Environmental Remediation
Neutralizes acidic mine drainage and treats industrial effluents containing heavy metals (e.g., mercury, cadmium).
Agriculture
Adjusts soil pH in alkaline soils and acts as a sulfur source in fertilizer production. Mitigates heavy metal toxicity in crops.
Rubber and Detergent Production
Accelerates vulcanization in rubber manufacturing. Enhances cleaning efficiency in industrial detergents by softening hard water.
Packaging Types
- 25 kg HDPE Bags:
Moisture-resistant, airtight bags with inner liners for small-scale industrial use. - 50 kg Steel Drums:
UN-certified containers for safe transport of corrosive materials. Ideal for medium-volume users. - 1 Ton Jumbo Bags (FIBCs):
Flexible Intermediate Bulk Containers with anti-static liners for bulk handling in mining and chemical plants. - Bulk ISO Tanks:
Corrosion-resistant tanks for liquid sodium sulfide solutions, used in large-scale water treatment facilities. - Customized Packaging:
Available for food-grade or high-purity applications, including vacuum-sealed containers for anhydrous forms.
For tailored packaging solutions, safety training, or regulatory support, consult our technical team or download the TDS for full specifications.
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