Resorcinol
An antiseptic and a building block of permanent hair dyes, occasionally used in acne products. A frequent contact allergen that, in large repeated doses, affects the thyroid. The EU caps its concentration and where it may be applied.
Evidence by route
Topical application
Performs as intended in hair dyes but carries a high allergen load and a systemic thyroid risk above set doses. EU rules cap the concentration. A patch test before dyeing with resorcinol is warranted.
- EU Regulation 1223/2009 on cosmetic products
- SCCS opinion on Resorcinol
How to read tiers A–F
- CWeak evidence. In vitro data, open-label studies, or expert consensus
Tolerability and safety
- Irritation potential
- Medium
- Allergen risk
- High
- Pregnancy
- Caution
- Suitable for
- Normal, Oily
- Use with caution
- Sensitive, Dry
Frequently asked questions
Is Resorcinol safe during pregnancy?
Resorcinol should be used with caution during pregnancy. Consulting a dermatologist or OB-GYN is advisable.
What skin types is Resorcinol for?
Resorcinol suits: normal, oily. Use with caution in: sensitive, dry.
Can Resorcinol irritate the skin?
Resorcinol has moderate irritation potential. Sensitive skin may show a transient reaction that usually settles with adaptation.
Can Resorcinol cause an allergic reaction?
Resorcinol has high allergen potential. Perform a patch test on the inner forearm 24 hours before facial application.
What is Resorcinol and what does it do in cosmetics?
An antiseptic and a building block of permanent hair dyes, occasionally used in acne products.
What's the INCI name for Resorcinol?
The INCI name is Resorcinol. It may also appear as: 1,3-Dihydroxybenzene.
See Resorcinol in a product composition right on the store page
The Evigrade extension adds an evidence panel to iHerb, Sephora, Druni and 12 more stores. This ingredient and every other one in the product show evidence-tier, allergen risk and pregnancy/lactation flags at a glance.
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