Skip to content

Colorant

PHENYL METHYL PYRAZOLONE

CAS 89-25-8 Updated
42

Safety score · 0–100

Moderate

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

About

A pyrazolone coupler used in oxidative hair dyes to make specific shades. Like other dye intermediates it is a known sensitiser, regulated by the EU SCCS, and not safe for skin or eye area use.

Function

HAIR DYEING

Skin benefits

  • Coupler/modifier in hair colouring
  • Enables specific oxidative dye shades
  • Effective at low concentrations
  • Used in EU-permitted hair dye formulas

Known concerns

  • Hair-dye intermediate with sensitisation potential
  • SCCS imposes use limits in oxidative hair dyes
  • Allergic contact dermatitis cases reported
  • Not for use near eyes or eyebrows/eyelashes

References

EU

EU CosIng database

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

Related colorants

42
2,6-DIHYDROXY-3,4-DIMETHYLPYRIDINE
Colorant
 42
ACID RED 195
Colorant
 42
BASIC YELLOW 87
Colorant
 42
CI 18736
Colorant
 42
CI 45100
Colorant
 42
CI 61565
Colorant
 42
CI 69800
Colorant
 42
HC RED NO. 20
Colorant

Check your shelf

Find PHENYL METHYL PYRAZOLONE in your products.

Scan any cosmetic product with LuxSense to see if it contains PHENYL METHYL PYRAZOLONE 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.