Skip to content

Hair Dye

BASIC RED 51

CAS 77061-58-6 Updated
42

Safety score · 0–100

Moderate

Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.

About

A semi-permanent hair dye — gives vivid red/pink colour but flagged by the SCCS for cytotoxicity and potential degradation by-products. EU-restricted to a maximum 1% in non-oxidative dyes.

Skin benefits

  • Vivid red/pink semi-permanent hair colour
  • Effective at low concentration
  • EU permits up to 1% in non-oxidative hair dyes

Known concerns

  • SCCS flagged toxicity to skin and ocular cells in vitro
  • Possible release of toxic by-products on degradation
  • Skin sensitiser concerns in patch testing
  • Not suitable for leave-on skin contact

References

EU

EU CosIng database

European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.

Related hair dyes

42
DIHYDROXYINDOLE
Hair Dye
 42
HC RED NO. 8
Hair Dye
 42
HYDROXYETHYL METHYLTOLYLAMINE
Hair Dye
 42
M-AMINOPHENOL
Hair Dye
 42
N,N'-BIS(2-HYDROXYETHYL)-2-NITRO-P-PHENYLENEDIAMINE
Hair Dye
 45
4-AMINO-2-HYDROXYTOLUENE SULFATE
Hair Dye
 45
DIHYDROXYINDOLINE
Hair Dye
 38
HC BLUE NO. 15
Hair Dye

Check your shelf

Find BASIC RED 51 in your products.

Scan any cosmetic product with LuxSense to see if it contains BASIC RED 51 and get a full ingredient breakdown with safety scores.

This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve — always read the physical product label and consult a healthcare professional for personal concerns.