Properties: Color: Red in either powder of crystalline form Gray crystalline metal-like form (metallic selenium) Selenium is used to remove color from glass It is also used to give a red color to glasses and enamels
Isotopes: Selenium isotopes are mainly used for the production of medical and industrial radioisotopes. Se-77, Se-78 used to make Br-77 Se-80 used to make Br-80m Se-74 used to make Se-75 which is used as a source in gamma radiography.
Availability in foods: Brazilian nuts Fish Meat and eggs Brewer’s yeast Wheat germ Sunflower seeds Shellfish walnuts
Availability in nature: Selenium is commonly found in sedimentary rock. Not often found in pure substances. Most commonly found with sulfide minerals or with silver, copper, lead, and nickel minerals. Cost: Pure: $61.00 per 100g Bulk: $5.30 per 100 g
Uses: By itself: Used as a catalyst Used in solar cells and photocells In brasses and stainless steels: It improves the machinability of these compounds.
Fun facts: Itis not recommended to consume more than 30 mcg per day, too much Selenium causes Selenosis which can cause loss of hair, skin, and nails. High levels of selenium in males is associated with male infertility.