used as oxidizer, catalyst, and chemical reagent, etc.

Name : Selenium Dioxide
Chemical Composition : SeO2
Red-white or shiny needle crystal powder, irritating smell
Molecular weight: 110.96
Vapor pressure 0.13kPa (157 c)
Melting point: 340 ~ 350 c
Solubility: Insoluble in water, ethanol, acetone, benzene, acetic acid
Density: Relative density (water = 1) 3.95
Stability: Stable

Properties:

White, glittering squared crystal, specific weight is 59-3.95S , is extremely apt for evaporation; sublimation temperature is 315 S , the melting point is 340-350. It would easily turns into selenious acid when soluble in water(H2SeO3). The gasous selenium dioxide is yellowrish green, with stink of garlic, and toxic. The selenium dioxide is a strong oxidizer, and can be reduced into elementary selenium by sulfur dioxide, hydrogen, ammonia, carbon monoxide and carbon.

Applications:

used as oxidizer, catalyst, and chemical reagent, as well as be used as addictives for electrolytic manganese enterprises .