ACID RED 18 is graded C (Moderate) by Expert·ING, based on COSING regulatory data. It is restricted under EU COSING — AnnexIII-SAFETY-.
ACID RED 18
Safety grade: C
Acid Red 18 is a synthetic red dye commonly used in hair coloring products. It's a man-made colorant that bonds to hair to create vibrant red tones.
This ingredient is used in hair dyes to impart and deposit red color onto hair strands, creating long-lasting color results.
Graded using: COSING.
- EU COSING — Restricted
Last verified: May 26, 2026
Safer alternatives to ACID RED 18
- BASIC RED 51 — Grade A. Basic Red 51 provides red hair color, direct substitute for red dye.
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