Science
Mechanism of Action
As a fluorescent dye, Solvent Green 7 imparts a characteristic yellow-green color to formulations. Its mechanism of action involves strong fluorescence, which is optimally activated in alkaline solutions, particularly within a pH range of 9.0-10.0. This pH sensitivity is demonstrated by a shift in its maximum emission wavelength from 403 nm at pH 4.0 to 454 nm at pH 9.0, allowing it to function both as an aesthetic colorant and a subtle indicator of pH.
Research
Clinical Evidence
Insufficient-data confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Solvent Green 7 exhibits excellent water solubility, dissolving readily to form clear solutions. Its fluorescence is strongest in alkaline conditions, with optimal activity observed at pH levels not less than 9.0-10.0, aligning with its pKa of 7.3 at 22°C. The ingredient is light-sensitive, necessitating storage in tight, light-resistant containers in a cool, dry environment. Thermal decomposition occurs at temperatures exceeding 252-258.5 °C.
Safety
Safety Profile
Solvent Green 7 is certified by the FDA for external use in drugs and cosmetics, adhering to Good Manufacturing Practices (GMP). While some Safety Data Sheets (SDS) classify it as non-corrosive, non-irritating to skin, and not a skin sensitizer in human tests, other sources indicate potential irritation to eyes, respiratory system, and skin. However, no components are identified as probable, possible, or confirmed human carcinogens by IARC at concentrations of 0.1% or greater.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Solvent Green 7 is a valuable cosmetic ingredient, recognized for its vibrant yellow-green color and pH-sensitive fluorescence, offering broad skin compatibility and low irritancy as supported by independent assessments.
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