Sodium Sulfate CAS#7757-82-6
High Solubility：Sodium sulfate dissolves readily in water, while its solubility drops sharply as temperature decreases. It barely dissolves in ethanol and other organic solvents. This unique solubility trait supports its broad industrial applications.
Stable pH：Its aqueous solution presents neutral to weakly alkaline properties, with pH generally ranging from 6.0–8.0. It keeps stable under regular ambient conditions. When meeting strong acids, no obvious hydrolysis reaction occurs.
Versatile Uses：It is commonly adopted as a filler and processing aid for detergent, textile dyeing and leather tanning. It also serves as raw feedstock for sodium salt manufacturing, a dehydrating agent in organic synthesis, and a reagent for wastewater treatment.
Crystalline Form & Hygroscopic Nature：This product is offered as white crystalline granules or powder with low moisture absorption. Anhydrous sodium sulfate and decahydrate sodium sulfate are two mainstream grades to match different formulation and manufacturing requirements.
Sodium sulfate, with the molecular formula Na₂SO₄, appears as an odourless white crystalline powder. It is soluble in water, with solubility decreasing sharply as temperature rises, and barely dissolves in ethanol. The aqueous solution is nearly neutral. This substance has low irritation to human bodies. It is widely applied in detergent formulation, textile dyeing, leather processing, sodium salt production and wastewater treatment.
Sodium Sulfate Chemical Properties
| Item | Specification |
| Melting point | 884 °C |
| Density | 2.70 g/cm³ |
| Storage temp | Store below +30°C |
| Solubility | Soluble in water; practically insoluble in ethanol |
| Form | Crystal / Powder |
| Color | White |
| Odor | Odorless |
| PH Range | 5.2–8.0 (50 g/l, H₂O, 20°C) |
| Stability | Stable under normal conditions. Incompatible with strong acids, strong oxidizing agents |
This compound is employed as a filler in detergent and textile industry, a raw material for sodium silicate and sodium sulfide, and a coagulant in papermaking. It also functions as a dyeing auxiliary, a dehydrating agent, a blending agent for cement, a stabilizer for latex, and a laxative in pharmaceutical field. Additionally, it finds application as a raw material for manufacturing other sodium salts.
