Beauty ingredient · Hair dye

Resorcinol

CAS
108-46-3

An ingredient in oxidative hair dyes and some acne products.

  • Expert review pending

Concern level

Moderate concern Level 2 of 4 How concern levels work

Strong evidence of harm at high intake, emerging evidence of harm, or a common allergen or irritant. The concern level sets how many points resorcinol costs on a product’s receipt.

What the evidence says

  • Restricted useRegulatory

    Allowed in EU hair dyes with limits and the warning "Contains resorcinol"; Canada does not permit it in products for the skin. [1][2]

Evidence tiers say how sure the evidence is, separately from how much it matters. About evidence tiers.

Rules around the world

How regulators treat Resorcinol
WhereStatusDetailsDateSource
European Union Restricted Oxidative hair dye up to the Annex III limit, with the warning "Contains resorcinol". — [1]
Canada Restricted Not permitted in cosmetics intended for use on the skin. — [2]

“Banned” means explicitly prohibited or withdrawn after review; “not permitted” means never authorized there. We use each regulator’s own words.

Names GoodSwap recognizes on labels (3)
  • resorcin
  • resorcinol
  • 1 3 benzenediol

Sources

  1. Regulation (EC) No 1223/2009 of 30 November 2009 on cosmetic products

    European Union (Official Journal) · Nov 30, 2009 · Law

    “cosmetic products shall not contain any of the following: (a) prohibited substances — prohibited substances listed in Annex II”

    eur-lex.europa.eu

  2. Cosmetic Ingredient Hotlist: prohibited and restricted ingredients

    Health Canada · Aug 13, 2025 · Regulator

    “The following ingredients are only permitted in cosmetic products under the conditions of use specified below:”

    canada.ca