2,2'-METHYLENEBIS-4-AMINOPHENOL HCL is graded A** (Safe) by Expert·ING, based on COSING regulatory data.
2,2'-METHYLENEBIS-4-AMINOPHENOL HCL
Safety grade: A**
This is a synthetic chemical compound used in hair coloring products. It works as a dye coupler, helping to create and stabilize color molecules within the hair shaft.
This ingredient is used in hair dye formulations to help develop and fix permanent or semi-permanent color, ensuring longer-lasting and more even hair color results.
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