Quality Standard：
| Item | Specification |
| Appearance | White crystalline powder |
| Assay | ≥ 99.95% |
| Hydroquinone ppm | Negative |
| Melting point | 202~207 ℃ |
| Clarity of water solution | Transparent, colorless, none suspended matters |
| pH value of 1% aqueous solution | 5.0～7.0 |
| Specific rotation | 【α】20D=+174.0°~+186.0º |
| Infra-red peak value | 1514cm-1 1229cm-1 1215cm-1 1059cm-1 1034cm-1 |
| Solubility | Soluble in water,
slightly soluble in ethanol |
| Arsenic | ≤ 2 ppm |
| Heavy metal | ≤ 10 ppm |
| Loss on drying | ≤ 0.5% |
| Residue on ignition | ≤ 0.5% |
Application: Skin Whitening and Freckles Minimizing
Solubility: Soluble in cold water (151g/l at 20℃), and can be easily incorporated into cosmetic formulation either warm (<70℃) or cold. ALPHA-ARBUTIN is compatible with UV filters and ethanol at concentrations up to 50%.
