Sodium selenate is an inorganic compound with the chemical formula Na2SeO4, which is highly toxic. Sodium selenate is a white solid. It is a strong oxidizing agent. It dissolves in water easily. Preparation. Sodium selenate is made by reacting sodium hydroxide with selenic acid. 

Properties

Melting Point: 32°C

Density: 3.213g/cm3

Appearance: White crystalline powder

Solubility: Soluble in water

Uses

Sodium selenate is mainly used to remove ticks, aphids and nematodes, and is used as a glass decolorizing agent, brightener, anti-corrosion agent and chemical analysis reagent. Sodium selenate is used as a mineral supplement.