Sodium selenite is the inorganic compound with the formula Na2SeO3. This salt is a colourless solid. The pentahydrate Na2SeO3(H2O)5 is the most common water-soluble selenium compound.
Molar mass: 172.948 g·mol−1
Appearance: colourless solid
Density :3.1 g/cm3
Melting point: decomposes at 710 °C
Solubility in water:85 g/100 mL (20 °C)
Solubility: insoluble in ethanol
In glass manufacturingSodium selenite is used in the manufacture of colorless glass. It acts as an ingredient in some food supplements. It is an animal feed used in pet foods.