2,6-DIHYDROXY-3,4-DIMETHYLPYRIDINE is graded C (Moderate) by Expert·ING, based on COSING regulatory data. It is restricted under EU COSING — AnnexIII-SAFETY-.
2,6-DIHYDROXY-3,4-DIMETHYLPYRIDINE
Safety grade: C
This is a lab-created chemical compound used in hair coloring products. It works as a color-developing ingredient that helps create specific shades when applied to hair.
It is used in hair dye formulations as a color coupler, reacting with oxidizing agents to produce specific pigment tones that color the hair.
Graded using: COSING.
- EU COSING — Restricted
Last verified: May 26, 2026
Safer alternatives to 2,6-DIHYDROXY-3,4-DIMETHYLPYRIDINE
- 2-METHOXYMETHYL-P-PHENYLENEDIAMINE — Grade A. Aromatic amine oxidative hair dye precursor producing similar color tones.
- LAWSONIA INERMIS EXTRACT — Grade A. Plant-based natural colorant alternative for hair dyeing applications.
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