Science
Mechanism of Action
This xanthene dye functions by absorbing specific light wavelengths to produce color. On skin, it creates a staining effect through protein binding, with color expression influenced by pH and moisture levels.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Highly stable in alkaline conditions, but precipitation may occur below pH 4.0. It exhibits greenish-yellow fluorescence under UV light (365nm).
Conflicts
- Strong oxidizing agents
- Strong reducing agents
- Strong acids
- Heavy metal ions (e.g., iron, copper)
Safety
Safety Profile
Regulated as D&C Red No. 22 in the US (FDA-approved for cosmetics/drugs, excluding eye area) and permitted in the EU (Annex IV, not for eye products). It is categorized as a moderate sensitizer.
Your Skin
Skin Compatibility
Our Assessment
Verdict
As a cosmetic colorant with regulatory restrictions and moderate sensitization potential, its inclusion should be carefully considered for specific formulation needs, particularly avoiding eye products.
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References
Sources