Selenium
Se78.97 g/mol Calculated
Also called Vandex.
A trace nutrient the body needs for a handful of enzymes, and the element that made the first photocopiers work. Element 34. Found in fish, nuts, and mushrooms.
Sources and notes
- The introductionfrom sourceMoleculeFinder curated
- Other namesfrom sourcePubChem / Wikidata
- Formula and weightcomputedPubChem
- 2D drawingcomputedPubChem structure, drawn by RDKit
Where you encounter it
A pure element or an engineered material, rather than an ingredient in a product. Selenium on our curated lists.
Every product and list we hold
Sources and notes
- Our curated lists and their amountsfrom sourceMoleculeFinder curatedEach amount is an editorial figure from our food and drink lists, not a measurement of any one product.
- How it gets therefrom sourceMoleculeFinder curatedEach mark is set by hand on our lists, never inferred; a label's ingredient is added by the maker. A row with no mark data says Not marked.
- The line abovefrom sourceMoleculeFinder curatedFrom the group the molecule belongs to.
Properties and sources
Calculated by PubChem
- Molecular formula
- Se
- Molecular weight
- 78.97 g/mol
Reported Hazard label (GHS), ECHA, EU CLP Regulation, Safe Work Australia via PubChem
Danger Toxic pictogram (GHS06) and Health hazard pictogram (GHS08); hazard statements H301, H331, H373, H413
Groups it belongs to
- Category
- Element & material
- Family
- Chemical elements
- Hazard classes
- Acutely toxic, Health hazard, GHS Danger
- Size
- Under 100 g/mol
SMILES
[Se]PubChem CID 6326970 · Wikidata Q876 · InChIKey BUGBHKTXTAQXES-UHFFFAOYSA-N · Data refreshed
Questions
- What is Selenium?
- A trace nutrient the body needs for a handful of enzymes, and the element that made the first photocopiers work. Element 34. Found in fish, nuts, and mushrooms.
- Where is Selenium found?
- Selenium is found in fish, nuts and mushrooms. from source
- How toxic is Selenium?
- Its GHS hazard label carries the signal word Danger and the hazard pictograms Toxic and Health hazard. from source
- What kind of molecule is Selenium?
- Selenium has the formula Se and a molecular weight of 78.97 g/mol. MoleculeFinder files it under chemical elements, in the element & material group. from sourcefrom sourcefrom sourcefrom source
Sources and notes
- Calculated valuescomputedPubChemComputed from the structure, so no laboratory conditions apply; complexity is PubChem's own structural score.
- Hazard labelfrom sourceECHA, EU CLP Regulation, Safe Work Australia via PubChemThe label combines these classifications.
- ECHAfrom sourceAttributionSource: European Chemicals Agency, echa.europa.eu.
- EU CLP Regulationfrom sourceAttributionSource: EUR-Lex, Regulation (EC) No 1272/2008, © European Union.
- Safe Work Australiafrom sourceAttributionSource: Safe Work Australia, Hazardous Chemical Information System, © Commonwealth of Australia, CC BY 4.0.
- Data refreshedfrom sourceMoleculeFinder2026-11-09