Korean: 다이하이드록시인돌린 · CAS 29539-03-5 · Functions: hair dyeing
Restricted MFDS restricted ingredients
Conditions (official MFDS text, Korean):
다만, 비산화형염모제에서 용법·용량에 따른 혼합물의 염모성분으로서 2.0 % 이하는 제외
Source: MFDS — cosmetic ingredient use restrictions · checked Oct 17, 2026
Restricted Annex III/204
Maximum: 2.0%
Conditions: Product type: Hair dye substance in non-oxidative hair dye products
Required label warning: - Can cause allergic reaction - You have ever experienced any reaction afther colouring your hair - You have experienced a reaction to a temporary 'black henna' tattoo in the past
Source: EU CosIng — Annex III · checked Oct 17, 2026
No specific rule on file. The FDA regulates few cosmetic ingredients by name; no rule does not mean approval.
How Dihydroxyindoline 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.
| Market | Status | Conditions |
|---|---|---|
| AS ASEAN (10 countries) | Restricted | MFDS summary (Korean): (15) The free base and salts of this hair colouring ingredient, unless prohibited under Annex II, are permitted for use. * 단서조항(주석) : (15) The free base and salts of this hair colouring ingredient, unless prohibited under Annex II, are permitted for use. Annex II의 금지된 염모제의 염이나 자유 염기가 아니라면,... |
| TW Taiwan | Restricted | MFDS summary (Korean): ※ 染髮、脫色、脫染及燙髮產品之應刊載之注意事項，應依衛生福利部公告刊載之。 ※ 染髮產品之限量標準：係指該成分依產品使用說明書混合後之最高允許使用量。 ※ 化粧品之外包裝或容器，應明顯標示本表所列成分之注意事項。因外包裝或容器表面積過小或其他特殊情形致不能標示者，應於標籤、仿單或以其他方式刊載之。 ※ 本表所稱之口腔製劑，包含非藥用牙膏、漱口水類及美白牙齒類等化粧品。 ※ 化粧品宣稱效能者，須符合化粧品標示宣傳廣告涉及虛偽誇大或醫療效能認定準則規定。 * 단서조항 : ※ 染髮、脫色、脫染及燙髮產品之應刊載之注意事項，應依衛生福利部公告刊載之。 ※... |
Source: MFDS cosmetic ingredient use restrictions — overseas regulations · checked Oct 17, 2026
DIHYDROXYINDOLINE 다이하이드록시인돌린
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.
In the EU's CosIng records it is listed as “Restricted” (EU CosIng — Annex III). The maximum allowed is 2.0%. A restricted ingredient is allowed within the stated conditions.
In Korea's MFDS records it is listed as “Restricted” (MFDS — cosmetic ingredient use restrictions). A restricted ingredient is allowed within the stated conditions.
We found no specific rule for it in the FDA's records. That is not an approval or a safety statement.
The EU's CosIng inventory lists its functions as: hair dyeing.
Korea's MFDS standard Korean name is 다이하이드록시인돌린.
CAS 29539-03-5 (from official records).