Korean: 4-나이트로페닐아미노에틸우레아 · CAS 27080-42-8 · Functions: hair dyeing
Restricted MFDS restricted ingredients
Conditions (official MFDS text, Korean):
다만, 4-니트로페닐 아미노에칠우레아는 산화형염모제에서 용법·용량에 따른 혼합물의 염모성분으로서 0.25 % 이하, 비산화형염모제에서 용법·용량에 따른 혼합물의 염모성분으로서 0.5 % 이하는 제외
Source: MFDS — cosmetic ingredient use restrictions · checked Oct 16, 2026
Restricted Annex III/249
Maximum: (b) 0.5%
Conditions: Product type: (a) Hair dye substance in oxidative hair dye products (b) Hair dye substance in non-oxidative hair dye products (a) After mixing under oxidative conditions the maximum concentratio applied to hair must not exceed 0.25% For (a) and (b): - Do not use with notrosating agents - Maximum nitrosamine content: 50 microgram/Kg -
Required label warning: For (a) and (b): Hair colourants can cause severe allergic reactions Read and follow instructions
Source: EU CosIng — Annex III · checked Oct 16, 2026
No specific rule on file. The FDA regulates few cosmetic ingredients by name; no rule does not mean approval.
How 4-Nitrophenyl Aminoethylurea 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): * 【Restrictions】 Field of application and/or use : (a) Hair dye substance in oxidative hair dye products (b) Hair dye substance in non-oxidative hair dye products Use for dyeing eyelashes and eyebrows is not permitted. * 제한 【사용 범위】 : (a) 산화형 염모제에 염색 성분으로 (b) 비산화형 염모제에 염색 성분으로 눈썹이나 속눈썹의... |
| 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 16, 2026
4-NITROPHENYL AMINOETHYLUREA 4-나이트로페닐아미노에틸우레아
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 (b) 0.5%. 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 4-나이트로페닐아미노에틸우레아.
CAS 27080-42-8 (from official records).