Selenium element symbol Se, molecular weight is 78.96. The outermost electronic structure is 4S~P4, and selenium has four valence states: -2, 0, +4, and +6. Elemental selenium is divided into amorphous and hexagonal crystals. It is a gray-black powder with a melting point of 217°C, a boiling point of 685°C, and a specific gravity of 4.81.

Catalyst for the electrolytic manganese industry; in terms of metallurgy, the amount of selenium used in the electrolytic manganese industry accounts for a large proportion of total selenium production. In addition, selenium-containing carbon steel, stainless steel and copper alloys have good processing properties and can be cut at high speeds. parts with smooth surface

Se>=99.9％ Selenium ingots Selenium granules Selenium blocks