Hydroquinone
High ConcernAlso known as
hydroquinonequinol1,4-benzenediolp-dihydroxybenzene
The concern
Skin-lightening agent. EWG rates it high concern for cancer and immunotoxicity. Banned in cosmetics in the EU, UK, Japan, and Australia. FDA requires a prescription in the US. Linked to ochronosis (irreversible skin darkening) with chronic use.
What to look for on labels
This ingredient may appear under any of the following names or codes on product labels:
- Hydroquinone
- hydroquinone
- quinol
- 1,4-benzenediol
- p-dihydroxybenzene
Learn more
Read the full evidence directly from the authoritative source.
View source: EWG / EU CommissionData sourced from IARC, FDA, EFSA, WHO and EWG public data. For informational purposes only. This does not constitute medical or legal advice.