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1. Chemical Name: SODIUM SULFATE ANHYDROUS/SODIUM SULFATE DECAHYDRATE
2. Molecular Formula: Na2SO4/Na2SO4·10H2O
3. Molecular Weight: 142.042/322.20
4. CAS Number: 7757-82-6/7727-73-3
5. Packaging: Packaged in polyethylene plastic bags inside and plastic woven bags outside, with each bag weighing 25 kg.
6. Storage and Transportation: Should be stored in a dry, ventilated, clean warehouse. Handle with care to prevent damage and exposure to moisture and heat. During transportation, it should be protected from rain and moisture and stored separately from toxic substances.
| Specifications | |
| (Na₂SO₄), w/% | 99-100.5% |
| (Pb)/(mg/kg)≤ | 2mg/kg |
| (Se)/(mg/kg)≤ | 30mg/kg |
| (As)/(mg/kg)≤ | 3mg/kg |
| Loss on drying, w/% | 1/51-57% |
Sodium sulfate is a white crystalline or powdered substance that readily absorbs moisture from the air, transforming into a hydrated form. At 241°C, it transitions to a hexagonal crystal structure. The high-purity, fine-grained anhydrous form, supplied by leading sulfate manufacturers, is known as "anhydrous sodium sulfate" or "salt cake". It dissolves easily in water, producing a cooling sensation and a taste that is cool and slightly salty. In humid air, it tends to hydrate, forming a powdery hydrated surface layer.
Chemical Industry: Used in the production of sodium sulfide, sodium silicate, water glass, and other chemical products.
Paper Industry: Serves as a cooking agent in the manufacture of sulfate pulp.
Glass Industry: Acts as a substitute for soda ash as a flux.
Textile Industry: Used in the preparation of spinning coagulant for vinylon.
Others: Also used in non-ferrous metallurgy, leather, and as a raw material for producing sodium sulfide, pulp, glass, water glass, ceramic glazes. Additionally, it serves as a laxative and an antidote for barium salt poisoning."
