Dali Electronics

We offer Selenium in 4N to 7N purity.

Selenium (Se) is a member of Group 16 of the Periodic Table and is the 67th most abundant element within the Earth's crust. Selenium is chemically similar to sulphur (S) and tellurium (Te). It exists in two forms: a silvery metal or a red powder, the former being produced from the latter by heat. Red selenium is an amorphous, glass-like solid, whereas grey selenium is a soft, bluish-grey metal. Selenium's ability to give and take electrons explains why it is different from sulphur. When selenium gives electrons it is acting as a metal and when it accepts them it is acting as a non-metal. Selenium can be toxic, but is an essential nutrient in small amounts. Too much or too little of this substance is harmful to plants and animals alike.