Science
Mechanism of Action
CI 73900 functions by physically depositing synthetic pigment particles onto the skin's surface, reflecting light to produce a reddish-purple visual effect. Its action is purely aesthetic, providing coloration without interacting biochemically with the skin.
Research
Clinical Evidence
Insufficient-data confidenceN/A
Transparency
Dusting Analysis
As a pigment, CI 73900 is incorporated into formulations for its colorant properties rather than being 'dusted' as a pure active ingredient.
The Formula
Formulation
Stability
CI 73900 demonstrates exceptional stability across a broad range of conditions, exhibiting high resistance to heat, light exposure, various chemicals, organic solvents, acids, and alkalis, ensuring color integrity in diverse formulations.
Conflicts
- Hair coloring products
Safety
Safety Profile
Generally recognized as safe for cosmetic use within regulated quantities, CI 73900 is subject to restrictions. Under European Cosmetics Regulation 1223/2009, it is listed as a restricted ingredient (IV/102), permitted only in rinse-off cosmetic products and explicitly prohibited in hair coloring formulations. While minimal evidence suggests allergic reactions, individuals with sensitive skin or known allergies to synthetic pigments should exercise caution. Regulatory bodies, including the FDA, have evaluated its safety for cosmetic applications when purity standards are met.
Your Skin
Skin Compatibility
Our Assessment
Verdict
CI 73900 is a stable, generally safe cosmetic colorant that provides a reddish-purple hue to rinse-off products, deemed optional for formulations seeking aesthetic coloration.
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References
Sources