Science
Mechanism of Action
Functions as a direct-acting hair dye or oxidative dye precursor by diffusing into hair structures to deposit color pigments, rather than providing skincare benefits through typical mechanisms like antioxidant or exfoliant activity.
Research
Clinical Evidence
High confidence0.049%
Key findings
- 01 Human patch testing at 0.049% showed no sensitization reactions in 206 volunteers
- 02 Dermal absorption study at 0.15% demonstrated only 1.8% skin penetration with most material rinsed off within 20 minutes
- 03 Guinea pig studies at 3.0% revealed significant sensitization potential in 90% of test subjects
Transparency
Dusting Analysis
This ingredient is not typically used for marketing appeal in skincare and has strict regulatory limits due to sensitization concerns.
The Formula
Formulation
Stability
Requires dark storage conditions due to light sensitivity; hydrochloride salt form enhances water solubility compared to free base
Conflicts
- strong oxidizing agents
- strong reducing agents
- strong acids
- acid chlorides
- acid anhydrides
Safety
Safety Profile
Approved for hair dye applications only; not recommended for prolonged skin contact or use near eyes due to sensitization potential
Your Skin
Skin Compatibility
Our Assessment
Verdict
This hair dye ingredient offers no skincare benefits and poses unnecessary sensitization risks when used in facial or body care products.
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References
Sources