Science
Mechanism of Action
This ingredient operates as a cosmetic colorant by absorbing or reflecting specific wavelengths of visible light. This optical interaction results in the perception of a red color in products, and transiently on skin, nails, or hair upon application.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
CI 45100 exhibits robust stability across a broad pH range, from 2 to 11, and demonstrates heat resistance. For optimal color retention in water-soluble formulations, the inclusion of a UV filter is advised to mitigate potential fading caused by UV light exposure.
Conflicts
- Not recommended for leave-on cream, lotion, gel, or serum formulations where the color is intended for sustained skin adherence, due to its inherent water-soluble properties.
Safety
Safety Profile
Comprehensive safety assessments have concluded CI 45100 is safe for use in cosmetics and personal care products within specified limits. It has shown no evidence of skin or eye irritation, allergic reactions, immunotoxicity, developmental toxicity, or reproductive toxicity. Regulatory bodies, including the FDA, permit its use at concentrations up to 6.00% for skin products, and it is listed under Annex IV of the EU Cosmetics Regulation as a colorant, predominantly for rinse-off applications.
Your Skin
Skin Compatibility
Our Assessment
Verdict
CI 45100 is a safe, versatile, and highly stable cosmetic colorant, ideally suited for aesthetic enhancement in various rinse-off formulations.
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References
Sources