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.
| Item | Specification | Result | Test Methods |
| Appearance | Brown powder | Conforms | Organoleptic |
| Odor & taste | Characteristic | Conforms | Organoleptic |
| Mesh size | Through 80 mesh | Conforms | 80 mesh screen |
| Assay | ≥98.0% | 99.23%（HPLC） | HPLC |
| Loss on Drying | ≤5.00% | 3.85% | Drying Method |
| Ash | ≤5.00% | 3.29% | Ashing Method |
| Heavy metals | |||
| Total Heavy Metals | ≤10ppm | Conforms | |
| Arsenic | ≤1ppm | Conforms | GF AAS |
| Lead | ≤2ppm | Conforms | AFS |
| Cadmium | ≤1ppm | Conforms | AFS |
| Hygrargyrum | ≤0.1ppm | Conforms | AFS |
| Residual Solvent | Meet the requirements | Conforms | SOP/SA/SOP/SUM/304 |
| Pesticide Residue | Meet the requirements | Not detected | SOP/SA/SOP/SUM/304 |
| Microbiological Tests | |||
| Total Plate Count | ≤5000cfu/g | Conforms | Bacterial culture |
| Total Yeast & Mold | ≤100cfu/g | Conforms | Bacterial culture |
| E.Coli | Negative | Conforms | Bacterial culture |
| Salmonella | Negative | Conforms | Bacterial culture |
| Staphylococcus | Negative | Conforms | Bacterial culture |