4-HYDROXYPROPYLAMINO-3-NITROPHENOL is graded C (Moderate) by Expert·ING, based on COSING regulatory data. It is restricted under EU COSING — AnnexIII-SAFETY-.
4-HYDROXYPROPYLAMINO-3-NITROPHENOL
Safety grade: C
This is a synthetic orange-red dye used in hair coloring products. It works by depositing color onto the hair shaft to create vibrant tones, particularly warm copper and auburn shades.
It is used in hair dye formulations as a direct dye to impart orange and red color tones to the hair without requiring a chemical developer.
Graded using: COSING.
- EU COSING — Restricted
Last verified: May 26, 2026
Safer alternatives to 4-HYDROXYPROPYLAMINO-3-NITROPHENOL
- BASIC RED 51 — Grade A. Basic Red 51 is a direct hair dye providing red color without developer.
- BASIC RED 76 — Grade A. Basic Red 76 is a direct hair dye providing red color tones without developer.
- 2-METHOXYMETHYL-P-PHENYLENEDIAMINE — Grade A. Oxidative hair dye intermediate that develops orange and red tones in hair.
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