Science
Mechanism of Action
This ingredient functions via electrostatic attraction, where the positively charged (cationic) dye molecules bind to the negatively charged keratinocytes in the skin's stratum corneum. Additionally, it acts as a fluorescent pigment by absorbing ultraviolet radiation and re-emitting it within the visible spectrum to produce a luminous visual effect.
Research
Clinical Evidence
Medium confidence2%
Key findings
- 01 Scientific Committee on Consumer Safety (SCCS) evaluation confirming safety in non-oxidative applications up to 2.0% concentration.
- 02 Cosmetic Ingredient Review (CIR) assessment regarding protein-fiber binding affinity and potential for dermal sensitization at elevated concentrations.
Transparency
Dusting Analysis
As a colorant, it is rarely 'dusted' for marketing claims but is instead used in precise amounts for aesthetic impact; however, levels below 0.1% may fail to provide the intended fluorescent effect.
The Formula
Formulation
Stability
Maintains stability in acidic to neutral environments but exhibits low lightfastness. It is highly susceptible to degradation when exposed to intense UV or high thermal conditions.
Synergies
- aqueous-alcoholic solutions
Conflicts
- anionic surfactants
- strong oxidizing agents
- strong reducing agents
- nitrosating agents
Safety
Safety Profile
Restricted in the EU to a minimum purity of 99% with strict nitrosamine limits (50 μg/kg). Not currently FDA-approved for use in the immediate eye area or for general leave-on skin applications in the US market.
Your Skin
Skin Compatibility
Our Assessment
Verdict
A specialized fluorescent colorant that is effective for visual effects but offers no physiological skin benefits and carries a moderate risk of sensitization.
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References
Sources