Products Catalog
OnlineOrderLinks
Quality standard of Arbutin
Item |
Index |
| Appearance | White needle crystal or powder |
| Purity (%) min | 99.5 |
| Melting point(°C) | 199 ~ 201(±0.5) |
| pH value | 5.0~7.0(1%aqueous solution) |
| Heavy metal max | 10ppm |
| Clarity of water solution | Transparency, colorless, none suspended matters |
| Specific optical rotation | -63~-67 |
| Infrared signature peak | 1515cm-1 1220cm-1 1050±(5~8)cm-1 |
| Arsenic max | 2 ppm |
| Loss on drying (%) max | 0.5 |
| Hydroquinone max | 20ppm |
| Pathogen | Bacteria count<300CPU Fungus<100CPU |
