Hydroquinone
activeCAS: 123-31-9
Potent skin bleaching agent. Prescription-only in many countries. Can cause ochronosis with long-term use. EU-banned in cosmetics. Use under medical supervision only.
Safety Ratings
Safety2/5
Comedogenic0/5
Irritancy3/5
EWG Score6/10
Skin Type Compatibility
oily
3/5
dry
3/5
sensitive
1/5
combination
3/5
normal
3/5
Addresses Concerns
pigmentationmelasma
Functions
skin bleachingdepigmenting agent
Regulatory Status
EU
banned
KR
banned
US
restrictedmax 2%
Known Interactions
conflict
Benzoyl Peroxide
Using benzoyl peroxide with hydroquinone can cause temporary dark staining of the skin due to oxidation of hydroquinone. The stain is cosmetically undesirable but reversible. Avoid simultaneous application.