1-HYDROXYETHYL 4,5-DIAMINO PYRAZOLE SULFATE is graded A (Safe) by Expert·ING, based on COSING regulatory data.
1-HYDROXYETHYL 4,5-DIAMINO PYRAZOLE SULFATE
Safety grade: A
This is a synthetic chemical compound used in permanent and semi-permanent hair color products. It works as a color-forming agent that helps create the actual dye pigment when it reacts with other chemicals during the hair coloring process.
It is used in hair dye formulations as a color coupler or developer that reacts with oxidizing agents to produce and deposit color pigments 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