| Item | Specifications |
| Appearance | White crystalline powder |
| Assay | 99% min |
| Melting point | 110.0–115.0 ℃ |
| pH (3% water solution) | 3.5–5.5 |
| Free of VC | 10 ppm max |
| Heavy metal | 10 ppm max |
| Loss on drying | 0.5% max |
| Ignition residue | 0.2% max |
The ethyl modification at the C3 hydroxyl group completely solves the issues of oxidation, yellowing, and inactivation common in pure Vitamin C. It offers strong formulation compatibility and a long shelf life.
Its amphiphilic structure adapts well to the skin barrier, providing superior penetration compared to most Vitamin C derivatives and allowing it to reach the dermis to take effect.
Free from the acidic irritation of pure Vitamin C, it is suitable for sensitive skin and does not stain the stratum corneum.
Delivers multiple benefits, including whitening, anti-aging, antioxidant, anti-inflammatory, and collagen-boosting effects.