Ingredient profile
Tert-Butyl Hydroperoxide
Raters disagreeAt least one of our safety lists speaks to this ingredient.
Raters don't agree. Here's where each one stands
Safe
Greenlens Ingredient Scan
Independent
Greenlens Precautionary Screen
Independent
Greenlens Tolerance Screen
Independent
Caution
EU Harmonised Classification (CLP Annex VI)
Government
Concern
—
Where each list lands
Funding shown- Caution
EU Harmonised Classification (CLP Annex VI)
Government
Carries an EU harmonised classification (Muta. 2) — a suspected (category 2) carcinogen, mutagen or reproductive toxicant under CLP Annex VI, index 617-023-00-2. A hazard classification, not proof of harm at the level used. (EU CLP Regulation Annex VI, Table 3 (harmonised classification, ECHA export))
- Safe
Greenlens Ingredient Scan
Independent
No EU-regulated hazard recognized for this ingredient.
- Safe
Also screened — not on these lists
- Health Canada Ingredient Hotlist
- California Proposition 65
- US NTP Report on Carcinogens
- IARC Monographs
- ANSES Endocrine Disruptors
- EU Microplastics Restriction
Where regulators stand
Shown side by side, never combinedEach jurisdiction is reported on its own terms, from its own official lists. Where they disagree, that disagreement is the finding. Absence from a list is never a safety claim.
European Union
BannedProhibited as a cosmetic ingredient in this jurisdiction.
- European Commission · EU Cosmetics Regulation Annex II (prohibited)Listed in Annex II of the EU Cosmetics Regulation (ref 1641) — prohibited as an ingredient in cosmetic products.
- ECHA (EU CLP Regulation) · EU CLP Regulation Annex VI, Table 3 (harmonised classification, ECHA export): Muta. 2Carries an EU harmonised classification (Muta. 2) — a suspected (category 2) carcinogen, mutagen or reproductive toxicant under CLP Annex VI, index 617-023-00-2. A hazard classification, not proof of harm at the level used.
Canada
No listing foundNot on the lists we hold for this jurisdiction. That is an absence of a listing, not a safety finding.
Checked: Health Canada Cosmetic Ingredient Hotlist.
Notes
- EU harmonised CMR (cat. 2)
