Silicon
Si28.085 g/mol Calculated
Also called Meteorite, Silicium and Silicium Metallicum.
The element under every chip and solar panel, and in the quartz of most sand. The second most abundant element in the earth's crust, after oxygen. Element 14.
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. Silicon on our curated lists.
Household
Batteries and electronicsAdded by the maker
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
- Si
- Molecular weight
- 28.085 g/mol
Measured LD50, HSDB via PubChem
3,160 mg/kg pure silicon, rat, oral
An LD50 is an animal study measurement, not a dose for a person.
Groups it belongs to
- Category
- Element & material
- Family
- Chemical elements
- Product lists
- Batteries and electronics
- Size
- Under 100 g/mol
SMILES
[Si]PubChem CID 5461123 · Wikidata Q670 · InChIKey XUIMIQQOPSSXEZ-UHFFFAOYSA-N · Data refreshed
Questions
- What is Silicon?
- The element under every chip and solar panel, and in the quartz of most sand. The second most abundant element in the earth's crust, after oxygen. Element 14.
- Where is Silicon found?
- Silicon is in these product groups: batteries and electronics. from source
- How toxic is Silicon?
- The reported LD50 of Silicon is 3,160 mg/kg (rat, oral). An LD50 is an animal study measurement, not a dose for a person. from source
- What kind of molecule is Silicon?
- Silicon has the formula Si and a molecular weight of 28.085 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.
- LD50from sourceHSDB via PubChem
- Data refreshedfrom sourceMoleculeFinder2026-11-09