ACID YELLOW 23 is graded C (Moderate) by Expert·ING, based on COSING regulatory data. It is restricted under EU COSING — AnnexIII-SAFETY-.
ACID YELLOW 23
Safety grade: C
Acid Yellow 23 is a synthetic yellow dye used to color hair. It belongs to a class of colorants specifically formulated to bond with hair fibers and provide long-lasting color.
This ingredient is used in hair dyes to impart yellow pigmentation and color to hair strands.
Graded using: COSING.
- EU COSING — Restricted
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