Selenium Dioxide Granules (SeO2 Granules)

Physical and chemical properties

Selenium dioxide is an oxide with the chemical formula of SeO₂, white crystals, and green vapor; melting point is 340-350°C, sublimes at 315°C, density is 3.95 g/cm3 (15°C), and its acidity is weaker than sulfuric acid.

White glossy needle-like crystal, white or reddish glossy needle-like crystal powder, with pungent odor. Sour and burning sensation. The steam is yellow-green and has a spicy taste. Hygroscopic. Light and heat stable. 315 ℃ sublimation. It is easy to absorb dry hydrogen fluoride, hydrogen chloride, hydrogen bromide and hydrogen iodide to form the corresponding selenium oxyhalide.

Application

Selenium dioxide is mainly used in the electrolytic manganese industry, and about 1 kg of selenium dioxide is required to produce one ton of electrolytic manganese (each process is slightly different), and the electrolytic manganese industry accounts for about 80% of the consumption of selenium dioxide. Secondly, it is used to produce sodium selenite in the feed industry, and now it is also used as a foliar selenium fertilizer raw material for selenium-containing crops in the agricultural industry. Others can also be used: analytical, precipitated zirconium, hafnium. Determination of alkaloids. oxidizing agent. Manufactures other selenium compounds and high-purity selenium. catalyst.

1. It is used to make high-purity selenium and other selenium compounds, and it is also an oxidant and catalyst for organic synthetic drugs

2. It is used as a special reagent for plant alkaloids, and can also be used to precipitate zirconium, hafnium and prepare selenium compounds

3. Used as organic compound oxidant, catalyst, chemical reagent, raw material for various inorganic selenium compounds. Also used in copiers, rectifiers, etc.

4. Manufacture of other selenium compounds, determination of alkaloids, and oxidants. It reacts with ammonia to generate nitrogen and selenium, and in alcoholic solution, it generates ethylammonium selenite [NH₄(C₂H5)SeO₃], and with hydrazine to generate nitrogen and black amorphous selenium, and with hydroxylamine hydrochloride to generate nitrogen and reddish-brown amorphous selenium, With nitric acid to generate selenous acid.