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%.