Science
Mechanism of Action
Functions as a coupling agent that reacts with primary intermediates in oxidative environments to form large pigment molecules, though this mechanism is specifically designed for hair shaft penetration rather than skin application
Research
Clinical Evidence
Medium confidence1%
Key findings
- 01 Deemed safe for hair dye applications with maximum in-use concentration of 0.5% when combined with hydrogen peroxide
- 02 EC3 value established in LLNA testing, confirming moderate sensitization potential
Transparency
Dusting Analysis
Not applicable to skincare formulations due to specialized hair dye application and sensitization concerns
The Formula
Formulation
Stability
Exhibits optimal stability and reactivity under alkaline conditions typical of hair dye systems; susceptible to air oxidation causing color degradation
Conflicts
- Strong oxidizing agents
- Strong bases
- Iron and heavy metal salts
Safety
Safety Profile
SCCS restricts usage to 1.0% in hair dyes (0.5% post-developer mixing); classified as moderate sensitizer with potential eye corrosion risks
Your Skin
Skin Compatibility
Our Assessment
Verdict
Not suitable for precision skincare due to its specialized hair dye application, moderate sensitization risk, and lack of established skin benefits.
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References
Sources