DISPERSE BLUE 377 is graded A (Safe) by Expert·ING, based on COSING regulatory data.
DISPERSE BLUE 377
Safety grade: A
Disperse Blue 377 is a synthetic blue dye commonly used in hair coloring products. It's a chemical colorant that bonds to hair strands to create blue tones and shades.
This ingredient is used in hair dyes to impart blue color to hair by penetrating and coating 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