Selenium ion (Se²⁻, Se⁴⁺, Se⁶⁺ (depending on oxidation state; no single canonical abbreviation))

Selenium ions refer to selenium in its various ionic states (primarily selenide Se²⁻, selenite SeO₃²⁻, and selenate SeO₄²⁻). Selenium is a nonmetal element (atomic number 34, symbol Se) that is essential for human health as a component of selenoproteins involved in antioxidant defense and thyroid hormone metabolism[1][2][5][6]. Selenium ions are never themselves therapeutic targets like receptors or enzymes, but are instead incorporated into biomolecules or administered as supplements to treat or prevent selenium deficiency. Selenium status is relevant in various diseases, with roles both as an essential micronutrient and a potential toxicant at higher concentrations[2][5][6].

Other names

Selenium(II) ionSelenium(IV) ionSelenium(VI) ionselenide ion (Se²⁻)selenite ion (SeO₃²⁻)selenate ion (SeO₄²⁻)selenium cationselenium anion

Incorporated in selenoproteins (e.g., glutathione peroxidase) through dietary uptake; functions as cofactor in redox and antioxidant activities