Resorcinol
Resorcinol
Phenolic compound used in hair dyes and some scalp treatments. Subject to several use-context concentration caps. Source: Health Canada Cosmetic Ingredient Hotlist (restricted list), compiled from docs/cosmetic-ingredient-database.json. Verify against the live canada.ca Hotlist before relying on it.
Last reviewed April 27, 2026 · Always verify against the current Health Canada Cosmetic Ingredient Hotlist before use.
Health Canada Hotlist — Restricted
Hair dye: maximum 1.25% in finished product (oxidative dyeing). Other leave-on products: maximum 0.5%. Hair lotions and shampoos: maximum 0.5%. Carries hair-dye sensitization warning. Prohibited in eye-area products.
Product type restriction: Both types
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