Ingredient profile
MAGNESIUM PEROXIDE
Raters disagreeoxidisingCAS 1335-26-8CAS 14452-57-4
At least one of our safety lists speaks to this ingredient.
Raters don't agree. Here's where each one stands
Safe
Greenlens Precautionary Screen
Independent
Caution
Greenlens Ingredient Scan
Independent
Greenlens Tolerance Screen
Independent
Health Canada Ingredient Hotlist
Government
Concern
—
Where each list lands
Funding shown- Caution
Greenlens Ingredient Scan
Independent
Listed in Annex III of the EU Cosmetics Regulation (ref 12) — allowed only under restrictions. (EU Cosmetics Regulation Annex III (restricted))
- Safe
Greenlens Precautionary Screen
Independent
No listed hazard trait recognized for this ingredient.
- Caution
Greenlens Tolerance Screen
Also screened — not on these lists
- California Proposition 65
- US NTP Report on Carcinogens
- IARC Monographs
- ANSES Endocrine Disruptors
- EU Microplastics Restriction
- EU Harmonised Classification (CLP Annex VI)
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
RestrictedAllowed only under stated conditions or limits.
- European Commission · EU Cosmetics Regulation Annex III (restricted)Listed in Annex III of the EU Cosmetics Regulation (ref 12) — allowed only under restrictions.
Canada
RestrictedAllowed only under stated conditions or limits.
- Health Canada · Health Canada Cosmetic Ingredient HotlistRestricted by concentration and product type; not permitted for the genital area.
California
No listing found
Notes
- EU-restricted (with limits)
- Health Canada Hotlist — restricted
Found in 4 products
L'OréalExtra Strength High Performance Quick Blue for on & Off Scalp Applicationsafety 68
L'OréalTouch-On Highlights Highlighting Kit H90 Iced Champagne 1 kt (2020 formulation)safety 26
L'OréalCouleur Experte Express Color + Highlights 3.5 Red Cherry Chocolate Mousses Darkest Mahogany Brown 1 kt (2020 formulation)safety 0
