ACID BLUE 9 ALUMINUM LAKE is graded C (Moderate) by Expert·ING, based on COSING regulatory data. It is restricted under EU COSING — AnnexIII-SAFETY-.
ACID BLUE 9 ALUMINUM LAKE
Safety grade: C
This is a synthetic blue colorant that has been bonded to aluminum to make it more stable and longer-lasting in hair products. It's used to create blue tones and shades in hair dyes.
This ingredient provides blue pigmentation to hair dyes, allowing the product to color hair and create various blue-toned shades that resist fading.
Graded using: COSING.
- EU COSING — Restricted
Last verified: May 26, 2026
Safer alternatives to ACID BLUE 9 ALUMINUM LAKE
- ULTRAMARINES — Grade A. Ultramarine Blue provides the same blue hair color as Acid Blue 9.
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