4-AMINO-2-NITRODIPHENYLAMINE-2'-CARBOXYLIC ACID is graded F (Banned) by Expert·ING, based on COSING regulatory data. It is restricted under EU COSING — AnnexII.
4-AMINO-2-NITRODIPHENYLAMINE-2'-CARBOXYLIC ACID
Safety grade: F
This is a synthetic red-orange dye molecule used specifically for coloring hair. It works by depositing color onto the hair strand to create vibrant, lasting hues.
This ingredient is used in hair dye products to impart red and orange tones to the hair, providing color that can range from subtle tints to bold shades.
Graded using: COSING.
- EU COSING — Prohibited
Last verified: June 7, 2026
Safer alternatives to 4-AMINO-2-NITRODIPHENYLAMINE-2'-CARBOXYLIC ACID
- P-PHENYLENEDIAMINE — Grade D**. Oxidative hair dye coupler; produces red/orange tones like the source ingredient
- 1-NAPHTHOL — Grade C. Oxidative hair dye coupler; generates red and orange shades in permanent color formulas
- 2-AMINO-3-HYDROXYPYRIDINE — Grade C**. Oxidative hair dye intermediate; produces red tones in permanent hair coloring systems
Other Prohibited Chemical ingredients
- BUTYLPHENYL METHYLPROPIONAL — Grade F**
- ZINC PYRITHIONE — Grade F**
- HYDROXYISOHEXYL 3-CYCLOHEXENE CARBOXALDEHYDE — Grade F
- CI 73360 — Grade F
- PENTASODIUM PENTETATE — Grade F**
- 4-METHYLBENZYLIDENE CAMPHOR — Grade F
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
- 2-METHYL-5-HYDROXYETHYLAMINOPHENOL — Grade C