2,3-DIAMINODIHYDROPYRAZOLO PYRAZOLONE DIMETHOSULFONATE is graded A (Safe) by Expert·ING, based on COSING regulatory data.
2,3-DIAMINODIHYDROPYRAZOLO PYRAZOLONE DIMETHOSULFONATE
Safety grade: A
This is a synthetic chemical compound used in hair coloring products to help create and develop color in the hair. It works by reacting with other dye components during the coloring process to produce the desired hair color.
This ingredient is used in hair dye formulations as a color-forming agent, helping to produce permanent or long-lasting hair color by undergoing chemical reactions that deposit pigment into 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