4-NITROPHENYL AMINOETHYLUREA is graded C (Moderate) by Expert·ING, based on COSING regulatory data. It is restricted under EU COSING — AnnexIII-SAFETY-.
4-NITROPHENYL AMINOETHYLUREA
Safety grade: C
This is a synthetic chemical compound used in hair coloring products to help create color on the hair. It works by reacting with other dye components to produce specific shades in hair dye formulations.
This ingredient is used in hair dye products as a color-forming agent, helping to deposit and develop permanent or semi-permanent color onto the hair strand.
Graded using: COSING.
- EU COSING — Restricted
Last verified: May 26, 2026
Safer alternatives to 4-NITROPHENYL AMINOETHYLUREA
- 2-METHOXYMETHYL-P-PHENYLENEDIAMINE — Grade A. Oxidative hair dye precursor that forms color through similar chemical coupling reactions.
- 5-AMINO-6-CHLORO-O-CRESOL — Grade A. Oxidative hair dye intermediate that develops permanent color on hair fibers.
- BASIC RED 51 — Grade A. Direct dye that deposits color onto hair without requiring oxidative development.
- LAWSONIA INERMIS EXTRACT — Grade A. Natural plant extract used as a semi-permanent hair colorant, historically established dye source.
Other Hair Dyeing ingredients
- RESORCINOL — Grade E**
- THYMOL — Grade A
- M-AMINOPHENOL — Grade C**
- P-AMINOPHENOL — Grade C**
- 2-METHYLRESORCINOL — Grade C
- 4-AMINO-2-HYDROXYTOLUENE — Grade C
- P-PHENYLENEDIAMINE — Grade D**
- 2-METHYL-5-HYDROXYETHYLAMINOPHENOL — Grade C