Sodium sulfate is widely used in industries such as vinylon, alkaloids, bleaching and dyeing, synthetic detergents, glass, papermaking, tanning, oil and gas pipeline corrosion prevention, metal smelting, surface treatment, fillers and other industries.
1. Sodium sulfate: molecular formula Na2SO4, commonly known as Yuanming powder, anhydrous thenardite. White or light yellow, granular crystal or powder, bitter and salty taste, and hygroscopic. The relative density is 2.68, the melting point is 884 ° C, it is soluble in water, the solution is alkaline, and it is insoluble in ethanol. When exposed to air, it easily absorbs moisture and turns into aqueous sodium sulfate.