Silicon

CAS: 7440-21-3

High Risk (Adults)

Safety Summary

Hazard Profilereference

Risk (Adults)High

Risk (Children)High

Regulatory Status

SummaryNo major regulatory flags

Molecular FormulaSi

Molecular Weight28.085

Sources

These citations are the ones recorded for the human adult context.

PubChem Compound CID 5461123 DATABASE
EPA CompTox Chemicals Dashboard — DTXSID0051441 EPA
ATSDR Toxicological Profile — CAS 7440-21-3 REFERENCE
§ 1910.1000 Air contaminants. REGULATORY
identity database ECHA CHEM, Download all substances: REACH registrations (ECHA's own list of REACH-registered substances) REGULATORY · 2026
NIOSH Pocket Guide to Chemical Hazards - Silicon REGULATORY
OEHHA Proposition 65 List of Carcinogens or Reproductive Toxicants (CSV, list date 31-Jul-26) REGULATORY

Same data as the API response, which is open and needs no key. The full per-record source list is available to authenticated callers.

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