HC BLUE NO. 17 is graded A (Safe) by Expert·ING, based on COSING regulatory data.
HC BLUE NO. 17
Safety grade: A
HC Blue No. 17 is a synthetic colorant specifically designed for coloring hair. It's a type of hair dye molecule that penetrates the hair shaft to deposit blue color.
This ingredient is used in hair dyes to provide blue coloration and is classified as an oxidative hair dye component that develops color when mixed with a developer.
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