Science
Mechanism of Action
Penetrates hair fibers due to its small molecular size, either depositing color directly in semi-permanent applications or undergoing chemical reactions within the hair shaft to create larger pigment molecules in permanent dye systems.
Research
Clinical Evidence
High confidence0.5%
Key findings
- 01 SCCP safety evaluation at 0.5% concentration with margin of safety calculated at 357
- 02 Human repeat insult patch testing on 206 volunteers at 0.049% showing no adverse reactions
- 03 Guinea pig sensitization studies at 3.0% demonstrating strong sensitization potential
Transparency
Dusting Analysis
This ingredient is exclusively used in hair coloring applications and not incorporated into skincare formulations, making dusting analysis irrelevant.
The Formula
Formulation
Stability
Requires alkaline environment for stability and efficacy, sensitive to oxidation and requires protection from light and air exposure
Conflicts
- Strong oxidizing agents
- Strong acids
- Iron and copper salts
Safety
Safety Profile
Approved for hair dye use only when formulated to minimize sensitization risk. European regulations restrict to maximum 0.5% in finished products applied to scalp.
Your Skin
Skin Compatibility
Our Assessment
Verdict
This ingredient is designed exclusively for hair coloring applications and should not be used in facial or body skincare products.
Related
Similar Ingredients
Finding similar ingredients…
References
Sources