Science
Mechanism of Action
This ingredient functions exclusively as a cosmetic colorant, imparting a vivid blue shade without engaging in any known biological mechanism of action on the skin itself. It offers no inherent therapeutic or direct cosmetic benefits beyond its coloring properties.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
CI 73015 is a colorant with no inherent therapeutic claims, thus not typically subject to 'dusting' concerns regarding efficacy.
The Formula
Formulation
Stability
CI 73015 exhibits high water solubility, facilitating its integration into aqueous systems. Optimal pH for stability is within a narrow range of 4 to 6. Outside this range, particularly at pH 3-5, 7, and 8, it experiences appreciable to complete fading within a week. Strong alkalis (e.g., 10% sodium carbonate, 10% sodium hydroxide) and 10% sugar solutions also induce complete fading. The dye demonstrates poor stability to light and oxidation, with moderate heat stability. Its color can shift significantly with pH, appearing blue at neutrality, blue-violet in acidic conditions, and green to yellow-green in basic environments.
Conflicts
- strong bases
- strong acids
- oxidizing agents
- food components
Safety
Safety Profile
CI 73015 (Indigo Carmine, FD&C Blue No. 2) is globally approved for cosmetic use by regulatory bodies such as the EU (under EC Cosmetics Regulation 1223/2009 Annex IV) and the FDA (permanently listed with certification required). While no specific CIR safety assessment was identified, regulatory frameworks define maximum concentrations and permitted applications for colorants. Due to potential for mild irritation or allergic reactions, particularly for sensitive skin types, patch testing is advised prior to widespread use.
Your Skin
Skin Compatibility
Our Assessment
Verdict
CI 73015 is an optional ingredient, primarily serving as a cosmetic colorant to achieve a blue hue, but requires careful formulation due to its poor stability across pH ranges, light, and oxidation.
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