Science
Mechanism of Action
Functions as a cosmetic colorant, imparting a green, fluorescent color to cosmetic products, skin, nails, and/or hair through absorption or reflection of physical light.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
As a cosmetic colorant, this ingredient is not typically associated with dusting behavior relevant to active ingredient efficacy.
The Formula
Formulation
Stability
This ingredient's vibrant green fluorescence is highly pH-sensitive, exhibiting a significant 40% change between pH 6.6 and 8.5 (pKa approximately 7.3). For consistent product color, formulations are ideally kept outside this transition range. It remains stable under ambient conditions but requires protection from direct light and UV radiation. Decomposition occurs at temperatures exceeding 252-258.5 °C.
Conflicts
- strong oxidizers
- direct light irradiation
- UV-radiation/sunlight
Safety
Safety Profile
CI 59040 is permanently listed by the FDA as a color additive for externally applied drugs and cosmetics, strictly limited to a maximum concentration of 0.01% by weight of the finished product. The EU Cosmetics Regulation (EC) No. 1223/2009 permits its use in Annex IV as a colorant, subject to toxicological safety examination. It is specifically disallowed in products for mucous membranes (e.g., lip and eye areas). GHS classifications indicate it is not corrosive, irritant (skin/eyes), sensitizing, mutagenic, carcinogenic, or reproductive toxicant.
Your Skin
Skin Compatibility
Our Assessment
Verdict
CI 59040 is an optional cosmetic colorant providing a distinctive green fluorescence, suitable for most skin types at low concentrations but requiring careful pH and light management for color stability.
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References
Sources