Science
Mechanism of Action
Functions as an oxidative dye precursor that reacts with hydrogen peroxide and coupling agents to generate complex color molecules that penetrate and remain fixed within hair fibers through oxidative polymerization reactions.
Research
Clinical Evidence
High confidence1.5%
Key findings
- 01 Guinea pig ocular tolerance study at 1.5% showed minimal irritation (1/5 subjects)
- 02 Dermal sensitization testing up to 3% concentration demonstrated no allergic responses
- 03 Five-day repeated application study at 3% revealed no significant skin irritation per Draize evaluation
Transparency
Dusting Analysis
This ingredient is specifically regulated for hair dye applications with established maximum concentrations, making dusting practices unlikely in legitimate formulations.
The Formula
Formulation
Stability
Exhibits significant instability in aqueous solutions with 30% degradation within 48 hours at room temperature. Enhanced stability achieved through DMSO solubilization or hemisulfate salt formation.
Synergies
- Hydrogen peroxide (oxidizing agent)
- Dye couplers
- DMSO (stability enhancer)
Conflicts
- Strong oxidizing agents
- Strong acids
- Iron salts
Safety
Safety Profile
Approved by CIR Expert Panel for hair dye applications. EU SCCS restricts to maximum 1.5% in finished oxidative hair products. Classified as potential sensitizer requiring appropriate usage precautions.
Your Skin
Skin Compatibility
Our Assessment
Verdict
A specialized hair dye component with established safety parameters but limited skincare applications due to its specific colorant function and moderate sensitization potential.
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References
Sources