BASIC RED 51 is graded A (Safe) by Expert·ING, based on COSING regulatory data.
BASIC RED 51
Safety grade: A
Basic Red 51 is a synthetic red colorant used to tint hair products. It's a chemical dye that bonds to hair fibers to add or enhance red color.
This ingredient is used in hair dyes to impart and deposit red color onto hair strands, allowing for vibrant and long-lasting hair color results.
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