Science
Mechanism of Action
Penetrates the hair shaft through passive diffusion to deposit color pigments without requiring chemical oxidation reactions, functioning as a direct-acting toner that works independently of oxidizing agents
Research
Clinical Evidence
High confidence2.6%
Key findings
- 01 SCCNFP/SCCP safety evaluation at 2.6% concentration in hair dyes
- 02 SCCP animal irritation testing at 6.0% concentration in propanediol
Transparency
Dusting Analysis
Primarily used in hair coloring applications with established regulatory limits rather than skincare formulations
The Formula
Formulation
Stability
Maintains stability in aqueous solutions for 25 hours at ambient temperature and in CMC bases for 20 hours, though susceptible to nitrosation due to secondary amine structure
Conflicts
- Nitrosating agents
- Strong oxidizing agents
Safety
Safety Profile
Regulatory approval limited to hair dye applications at maximum 2.6% final concentration; requires allergen warning labeling due to sensitization potential
Your Skin
Skin Compatibility
Our Assessment
Verdict
Limited to hair coloring applications with significant sensitization concerns that make it unsuitable for precision skincare formulations.
Related
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References
Sources