4-FORMYL-1-METHYLQUINOLINIUM-P-TOLUENESULFONATE is graded A (Safe) by Expert·ING, based on COSING regulatory data.
4-FORMYL-1-METHYLQUINOLINIUM-P-TOLUENESULFONATE
Safety grade: A
This is a synthetic chemical compound used in hair coloring products. It works as a dye intermediate, helping to create color when it reacts with other ingredients during the hair dyeing process.
This ingredient is used in hair dye formulations to help produce and develop color in the hair shaft, contributing to long-lasting 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