Alpha-arbutin is a chemical substance. Alpha-arbutin is similar to arbutin, which can inhibit the production and deposition ofmelanin and remove stains and freckles. Studies have shown that Ursin Chemicalbook can inhibit the activity of tyrosinase at arelatively low concentration, and its inhibitory effect on tyrosinase is better than that of arbutin. Alpha-arbutin can be used incosmetics as a whitening agent.
| Items | Specification | Results |
| Assay | ≥99% | 99.80% |
| Appearance | White fine powder or crystals | Complies |
| Melting point | 202-206(±0.5)°C | 203-205°C |
| Solubility | Soluble in water,alcohol | Complies |
| Ash | ≤0.5% | 0.18% |
| Loss on drying | ≤0.5% | 0.11% |
| Pesticides | Negative | Complies |
| Heavy metals | ≤10ppm | Complies |
| Pb | ≤2.0ppm | Complies |
| As | ≤2.0ppm | Complies |
| Odor | Characteristic | Complies |
| Particle size | 100%through 80 mesh | Complies |
| Microbioiogical: | ||
| Total of bacteria | ≤300cfu/g | 22cfu/g |
| Fungi | ≤100cfu/g | 9cfu/g |
| Salmgosella | Negative | Complies |
| Coli | Negative | Complies |