Arbutin can be extracted from the leaves of bearberry and is a naturally occurring hydroquinone derivative.
It is a bioactive hydrophilic polyphenol, including different types according to its chemical structure: alpha arbutin powder, β-arbutin and deoxyarbutin.
In comparison, α-arbutin has the advantages of good stability and excellent whitening ability. Therefore, it is more widely used.
| Analytical Item | Quality standard | Inspection Data | Result |
| Assay | 98% Min | 98.95% | complies |
| Hydroquinone | Negative | Negative | complies |
| Description | White crystalline powder | White crystalline powder | complies |
| Melting point | 203-206±1oC | 203.2-205.8 oC | complies |
| Specific rotation | (a)20D=+174.0 º ~+186.0 º | +180.0º | complies |
| Solubility | Soluble in water slightly soluble in ethanol | complies | complies |
| Clarity | Solution should be clarify, none suspended matters | complies | complies |
| pH ( 1% aqueous) | 5.0～7.0 | 5.4 | complies |
| Loss on drying | ≤0.5% | 0.01% | complies |
| Residue on Ignition | ≤0.5% | 0.03% | complies |
| Heavy metal | ≤10 ppm | <10 ppm | complies |
| Lead | ≤10 ppm | <1.5 ppm | complies |
| Arsenic | ≤2 ppm | 0.048ppm | complies |
| Mercury | ≤1 ppm | 0.007ppm | complies |
| Total plate count | ≤100cfu/g | 100cfu/g | complies |
| Molds and Yeast | ≤50cfu/g | <10cfu/g | complies |
| E.Coli | Negative | Negative | complies |
| Staphylococcus aureus | Negative | Negative | complies |
| Salmonella | Negative | Negative | complies |
| P.aeruginosa | Negative | Negative | complies |
| Conclusion | According to in house standard (H-TSD-QC(CP-A)-001-01), result:PASS | ||
Arbutin generally appears in skin care product formulas as a composite whitening ingredient. Common ingredients that are paired with arbutin include niacinamide, vitamin C, and kojic acid.
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