1,2,4-TRIHYDROXYBENZENE is graded A (Safe) by Expert·ING, based on COSING regulatory data.
1,2,4-TRIHYDROXYBENZENE
Safety grade: A
This is a synthetic chemical compound made up of a benzene ring with three hydroxyl (oxygen-hydrogen) groups attached to it. It belongs to a family of chemicals called polyphenols and is used in hair coloring products.
It is used in hair dye formulations as a color-developing agent, helping to create and fix hair color by participating in oxidative chemical reactions that deposit pigment onto the hair shaft.
Graded using: COSING.
Last verified: May 26, 2026
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