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6-Hydroxyindole

Korean: 6-히드록시인돌 · CAS 2380-86-1 · Functions: hair dyeing

KR South Korea (MFDS)

Restricted MFDS restricted ingredients

Conditions (official MFDS text, Korean):
* 배합한도 : ∙ 산화염모에 0.5 % ∙ 기타 제품에는 사용금지

Source: MFDS — cosmetic ingredient use restrictions · checked Oct 17, 2026

EU European Union (CosIng)

No specific rule on file.

US United States (FDA)

No specific rule on file. The FDA regulates few cosmetic ingredients by name; no rule does not mean approval.

Other markets

How 6-Hydroxyindole is treated in 2 more markets, from the overseas cosmetic regulation database compiled by Korea's MFDS. Always confirm with the regulator of that country before selling there.

MarketStatusConditions
CN ChinaRestricted MFDS summary (Korean): * 【화장품 중 최대사용농도】 배합한도 (산화형 염색제) : 0.5%
AS ASEAN (10 countries)Restricted MFDS summary (Korean): * 【Restrictions】 Field of application and/or use : Hair dye substance in oxidative hair dye products. Use for dyeing eyelashes and eyebrows is not permitted. * 제한 【사용 범위】 : 산화형 염모제에 염색 성분으로 눈썹이나 속눈썹의 염색은 사용금지 * 【Restrictions】 Other limitations and requirements : After mixing under oxidative...

Source: MFDS cosmetic ingredient use restrictions — overseas regulations · checked Oct 17, 2026

Also listed as

6-Hydroxyindole 6-히드록시인돌

Information only, not medical advice. Rules change — always check the linked official source. If you are pregnant, have a skin condition or allergies, ask a dermatologist or pharmacist.

Frequently asked questions

Is 6-Hydroxyindole banned in the European Union?

We found no specific rule for it in the EU's CosIng records. That is not an approval or a safety statement.

Is 6-Hydroxyindole banned in South Korea?

In Korea's MFDS records it is listed as “Restricted” (MFDS — cosmetic ingredient use restrictions). A restricted ingredient is allowed within the stated conditions.

Is 6-Hydroxyindole allowed in cosmetics in the U.S.?

We found no specific rule for it in the FDA's records. That is not an approval or a safety statement.

What is 6-Hydroxyindole used for in cosmetics?

The EU's CosIng inventory lists its functions as: hair dyeing.

What is 6-Hydroxyindole called on Korean labels?

Korea's MFDS standard Korean name is 6-히드록시인돌.

What is the CAS number of 6-Hydroxyindole?

CAS 2380-86-1 (from official records).

Ask KBeauty Verified™
KBeauty Verified™ — K-beauty checked against official records from Korea, the EU and the U.S.
Reading time:
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ChatGPT: 2 Claude: 0 Google · Gemini: 0 Perplexity: 0 Meta AI: 0 Amazon: 0 Others: 1
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Named by what the crawler says it is; look-alikes we detect are counted under Others. Google · Gemini includes Googlebot, Google’s search crawler, whose index Google also uses for its AI features; other search engines and bots are in Others. AI visibility →