Science
Mechanism of Action
Functions as a direct-dyeing colorant by penetrating hair fibers and binding to keratin proteins within the cortex. The compound's aromatic amine structure allows it to interact with protein components, creating stable color deposits that produce characteristic golden-blonde shades.
Research
Clinical Evidence
High confidence1%
Key findings
- 01 Percutaneous absorption study at 0.77-1.54% showing minimal skin penetration (0.21-1.67% of dose)
- 02 Non-irritating at 0.5% concentration in propylene glycol at pH 6.0 in rabbit studies
Transparency
Dusting Analysis
Regulatory bodies set maximum concentrations at 1.5-2.0% for hair applications, making higher percentages unnecessary and potentially problematic
The Formula
Formulation
Stability
Exhibits pH-dependent color changes from yellow (acidic) to orange-brown (alkaline). Stable under oxidative conditions with hydrogen peroxide.
Synergies
- oleic acid
- isopropanol
Conflicts
- strong oxidizing agents
- strong acids
- acid chlorides
- acid anhydrides
- chloroformates
- iron
Safety
Safety Profile
Recognized as potential skin sensitizer but deemed safe for hair dye applications by CIR and SCCS/SCCP. Maximum on-head concentration after mixing should not exceed 2.0%.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Effective hair colorant with established safety profile for its intended use, though limited to hair applications due to sensitization potential.
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References
Sources