Hydroquinone

Also known as: benzene-1,4-diol, quinol

Varies by useunder our published method

Varies by use. The concern our method flags differs by product type and market — see the per-use verdicts below.

By NordicScan Evidence Engine · generated from structured evidence records · source spans verified by automated gates · Reviewed 2026-07-08 · Evidence snapshot geo-wave1-evidence-snapshot-2026-07-08 · Scoring engine det_v3 · how we score.

What it is

Hydroquinone is used in some skin-lightening drug/cosmetic-borderline contexts and in restricted professional nail-system uses.

Why people ask

People ask because US OTC skin-lightening status and EU professional-use status are split rather than one global cosmetic permission.

What our method flags — by use

Cosmetic · US OTC skin-lightening products

For US OTC skin-lightening products, our method rates hydroquinone as higher-concern: FDA states these products are not approved for over-the-counter sale (prescription products remain available through a health care provider).

The US FDA restricted by current published position the OTC sale of skin lightening products containing hydroquinone; prescription products remain available.

Authority / source	Finding (our paraphrase)	Evidence tier	Date	Link
US FDA	The US FDA restricted by current published position the OTC sale of skin lightening products containing hydroquinone; prescription products remain available.	authority_regulatory	2026-05-11	source
US FDA	FDA restricted by current published position the over-the-counter sale of skin lightening products containing hydroquinone — not approved for OTC sale; prescription hydroquinone products remain available.	authority_regulatory / --	2026-05-11	source

Evidence coverage for this use: Fair (computed from source count × authority tier × recency; signals depth, does not change the concern band).

Cosmetic · EU professional nail systems

For EU professional nail systems, our method rates hydroquinone as moderate-concern because the EU use is restricted to a professional-use context.

The EU restricted by Regulation (EC) No 1223/2009 hydroquinone use to specific professional artificial nail-system conditions.

Authority / source	Finding (our paraphrase)	Evidence tier	Date	Link
European Union / EUR-Lex	The EU restricted by Regulation (EC) No 1223/2009 hydroquinone use to specific professional artificial nail-system conditions.	authority_regulatory	2009-11-30	source

Evidence coverage for this use: Limited (computed from source count × authority tier × recency; signals depth, does not change the concern band).

How this moves a product’s score

On a product score, hydroquinone varies by use: US OTC skin-lightening products and EU professional nail-system uses are kept as separate scopes.

Nordic Scan provides ingredient information and a concern score under our published method, for general consumer research. It is not medical advice and not a medical device, and does not diagnose, treat, cure, or prevent any disease, or determine the safety of any product. Decide for yourself.

Common questions

Why does hydroquinone vary by use?: The cited rules apply to different product pathways, so one global cosmetic verdict would hide the split.

This is what Hydroquinone is. What’s in the products you buy? Scan a label and see the concern signals our method flags. Get the app.

Reviewed 2026-07-08 · Evidence snapshot geo-wave1-evidence-snapshot-2026-07-08 · Scoring engine det_v3 · Sources checked 2026-07-08 · See how we score.