TBHQ (tert-Butylhydroquinone)

Safety Summary

Regulatory Status

Sources

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

• US FDA: TBHQ (tert-Butylhydroquinone) — 21 CFR 172.185, Permitted Antioxidant in Fats and Oils, 0.02% Fat Content Limit, GRAS Status, JECFA ADI 0.7 mg/kg bw/day, and Dietary Exposure Assessment (2022) REGULATORY · 2022
• Opinion of the Scientific Panel on Food Additives, Flavourings, Processing Aids and Materials in Contact with Food on a request from the Commission related to tertiary-Butylhydroquinone (TBHQ) REGULATORY
• Statement on the refined exposure assessment of tertiary-butyl hydroquinone (E 319) REGULATORY
• identity database ECHA CHEM, Download all substances: REACH registrations (ECHA's own list of REACH-registered substances) REGULATORY · 2026
• where to look PubChem: Toxicity section (CID 16043) PUBCHEM
• OEHHA Proposition 65 List of Carcinogens or Reproductive Toxicants (CSV, list date 31-Jul-26) REGULATORY
• Permissible Exposure Limits – OSHA Annotated Table Z-1 REGULATORY
• where to look Hazardous Substances Data Bank (HSDB), as recorded by PubChem (Experimental Properties, CID 16043; where-to-look, not a source of this value) DATABASE · 2026
• EPA CompTox CTX API: predicted properties for DTXSID6020220 (TBHQ (tert-Butylhydroquinone)) REFERENCE

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