Anhydrous sodium sulfate (Na₂SO₄), CAS No. 7757-82-6, is a colorless crystalline or white powdery inorganic salt. It is odorless, has a slightly bitter taste, is readily soluble in water, and insoluble in ethanol.
It is an important basic inorganic chemical raw material, characterized by good stability, non-toxicity, and ease of handling. It is widely used in detergents, glass, papermaking, textiles, pharmaceuticals, and chemical synthesis industries.