Science
Mechanism of Action
Functions through oxidative coupling reactions in alkaline environments, forming large pigment molecules when combined with hydrogen peroxide and other intermediates. Does not provide direct skincare benefits like moisturization or anti-aging effects, as its mechanism targets hair cortex penetration rather than skin improvement.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 SCCS safety evaluation established 1.0% maximum safe concentration for scalp contact
- 02 Rabbit irritation testing at 6% aqueous solution showed non-irritating properties over 72 hours
Transparency
Dusting Analysis
Not appropriate for skincare dusting as it's a hair dye intermediate with no established cosmetic benefits and regulatory restrictions above 1.0%
The Formula
Formulation
Stability
Exceptional water solubility at 164 g/L but requires careful handling due to oxidation sensitivity. Solutions degrade rapidly and need daily preparation. Powder form remains stable when stored in darkness at ambient temperature.
Conflicts
- Strong oxidizing agents
- Light exposure
- Metal ions
Safety
Safety Profile
EU-regulated under Annex III/248 with strict concentration limits. Classified as skin sensitizer requiring caution in formulation.
Our Assessment
Verdict
Hair dye ingredient with no skincare benefits and sensitization risks that make it inappropriate for precision skincare formulations.
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References
Sources