Cosmetic ingredient dictionary
6-Hydroxyindole in cosmetics: what it is and what it does
6-Hydroxyindole is a cosmetic ingredient that colours hair. Open Beauty Facts finds it in 9 products.
By Bravoora teamUpdated Sources checked 2 sourcesHow we check
What does 6-Hydroxyindole do in a product?
In a cosmetic product, 6-Hydroxyindole colours hair. The EU’s CosIng database lists this job for it: hair dyeing.
What other names and numbers does 6-Hydroxyindole have?
- CAS number
- 2380-86-1
- EC number
- 417-020-4
- CosIng reference
- 31541
Which products contain 6-Hydroxyindole?
Open Beauty Facts finds 6-Hydroxyindole in the ingredient lists of 9 of the 22,021 products it has a list for.
Products with it, by country of sale: Norway 7 · United States 1 · Ukraine 1.
Counted on 13 October 2026 from Open Beauty Facts, which volunteers fill from real packs: it shows where 6-Hydroxyindole turns up, not how much of the market it is.
Bravoora reads this ingredient for everyone you shop for: an allergy or intolerance, a vegan or vegetarian diet, a calorie or protein goal, and the labels on supplements and skincare too. Build a profile · For dermatologists, dietitians and doctors
Sources
The job, the description and the EU annex entry are CosIng’s; the fragrance allergens are the EU Annex III names Bravoora’s label checker reads; the product counts are Open Beauty Facts’.
- European Commission: CosIng cosmetic ingredient database (functions, description, EU annex entry)
- Open Beauty Facts: product database, 77,506 products, read 13 October 2026, ODbL
Contains information from Open Beauty Facts, which is made available here under the Open Database License (ODbL). Read the licence · Download this dictionary’s data · How we check
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