2-AMINO-3-HYDROXYPYRIDINE is graded C** (Moderate) by Expert·ING, based on COSING regulatory data. It is restricted under EU COSING — AnnexIII-SAFETY-.
2-AMINO-3-HYDROXYPYRIDINE
Safety grade: C**
This is a synthetic chemical compound used in hair coloring products. It works as a color-forming ingredient that helps create the final shade when combined with other dye components.
It is used in hair dye formulations as a coupler, reacting with oxidizing agents to develop and fix color molecules that permanently tint the hair.
Graded using: COSING.
- EU COSING — Restricted
Last verified: May 26, 2026
Safer alternatives to 2-AMINO-3-HYDROXYPYRIDINE
- 2-METHOXYMETHYL-P-PHENYLENEDIAMINE — Grade A. Oxidative hair dye precursor that couples with oxidizing agents to develop permanent color.
- 5-AMINO-6-CHLORO-O-CRESOL — Grade A. Oxidative coupler in permanent hair dye formulations for color development and fixation.
- LAWSONIA INERMIS EXTRACT — Grade A. Natural plant-based colorant used in permanent and semi-permanent hair dye formulations.
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