Other Names:
Disodium Sulfate, Sodium Sulphate, Anhydrous Sodium Sulfate, Salt Cake, Sulfate of Soda
Specification Summary
- Purity: ≥99.0% (Technical Grade), ≥99.5% (Food/Pharmaceutical Grade)
- Form: White crystalline powder, granules, or hygroscopic crystals
- CAS No.: 7757-82-6
- Molecular Formula: Na₂SO₄
- Molecular Weight: 142.04 g/mol
Product Description
Sodium Sulfate is a non-corrosive, odorless, and water-soluble inorganic compound. It appears as a white crystalline solid with a neutral pH (~7 in solution). Highly stable under normal conditions, it absorbs moisture from air (hygroscopic) but does not react violently with most substances. Its high solubility in water (47.6 g/100 mL at 0°C) and thermal stability (melting point 884°C) make it versatile for industrial applications.
Sodium Sulfate Specification Table
| Property | Specification / Value |
| Purity (Na₂SO₄) | ≥99.0% |
| Bulk Density | 1,200–1,500 kg/m³ |
| Melting Point | 884°C |
| Solubility in Water | 47.6 g/100 mL (0°C) |
| pH (1% Solution) | 6.5–7.5 |
| Moisture Content | ≤0.5% |
| Chloride (Cl⁻) | ≤0.04% |
| Iron (Fe) | ≤10 ppm |
| Heavy Metals (as Pb) | ≤10 ppm |
| Water Insolubles | ≤0.05% |
Downloadable TDS
A comprehensive Technical Data Sheet (TDS) is available, providing chemical, physical, and safety specifications, as well as compliance with ISO 9001, FCC, and USP standards.
Application Sectors and Industries of Sodium Sulfate
Detergent Manufacturing
Acts as a filler in powdered laundry detergents, improving flowability and reducing production costs. Enhances surfactant efficiency by softening hard water.
Glass Production
Removes air bubbles from molten glass during refining, ensuring clarity and structural integrity. Lowers silica’s melting point, reducing energy consumption.
Textile Industry
Serves as a leveling agent in dyeing processes, ensuring uniform color absorption. Neutralizes acidic residues in synthetic fiber production.
Pulp and Paper Processing
Used in the kraft process to recover chemicals and delignify wood pulp. Improves paper brightness and reduces energy use in pulping.
Water Treatment
Neutralizes acidic wastewater and precipitates heavy metals (e.g., lead, copper). Protects pipelines from corrosion in municipal systems.
Food Industry (E514)
Approved as a food additive for pH adjustment, anticaking, and thickening in products like dairy, cereals, and bottled water.
Pharmaceuticals
Acts as an inert filler in tablet formulations and a laxative for detoxification. Used in intravenous solutions to maintain electrolyte balance.
Chemical Synthesis
Precursor for sodium sulfide, sodium bisulfate, and sodium silicate. Used in dye intermediates and battery recycling processes.
Mining and Metallurgy
Facilitates ore flotation to separate metals like copper and zinc. Neutralizes acidic byproducts in steel manufacturing.
Environmental Remediation
Treats contaminated soils and industrial effluents by immobilizing heavy metals. Used in sulfur dioxide (SO₂) scrubbing systems.
Packaging Types
- 25 kg HDPE Bags:
Moisture-resistant bags with inner liners for small-scale industrial or laboratory use. - 50 kg Multi-Wall Paper Bags:
Heavy-duty packaging with polyethylene coatings, ideal for detergent and textile industries. - 1 Ton Jumbo Bags (FIBCs):
Bulk Flexible Intermediate Bulk Containers for cost-effective transport in mining and glass manufacturing. - Bulk Pneumatic Tankers:
Designed for direct delivery to large-scale facilities, minimizing handling and contamination risks. - Food-Grade Packaging:
25 kg poly-lined bags with tamper-evident seals, compliant with FDA and EU food safety standards.
For tailored packaging solutions, safety guidelines, or volume discounts, consult our technical team or download the TDS for full specifications.
