- Type
- Hair dye intermediate
- How serious
- Moderate severity
- Evidence
- Moderate evidence
Why it is flagged
Interferes with thyroid peroxidase, the enzyme that builds thyroid hormone; concentration-restricted in the EU.
Health topics it bears on
Sources
- Cosmetic Ingredient Hotlist Health Canada, 2025
- Opinion on Resorcinol (SCCS/1619/20) Scientific Committee on Consumer Safety, 2021
Also listed as
1,3-benzenediol, 1,3-dihydroxybenzene