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Arbutin 4-hydroxyphenyl-beta-d-glucopyranosid 497-76-7
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1.Production information
Appearance | white crystal or powder |
Assay | 99.5%min |
M.P. | 199-201+/-0.5℃ |
PH value (1% water solution) | 5.0-7.0 |
Clarity of water solution | Transparent and colorless |
Specific rotatory power | -66+/2° |
Arsenic content | <2ppm |
Loss on drying | ≤0.5% |
Ignition residue | ≤0.5% |
Paradioxybenzene limitation | ≤10ppm |
Heavy metal | ≤10ppm |
Pathogen |
Bacteria count<300cpu/g Fungus<100cpu/g |
Storage condition | sealed,kept in a shady & dry place |
Packing | 25kg/carboard drum |
* The name "bearberry" for the plant derives from the edible fruit which is a favorite food of
bears. The leaves of the plant are used in herbal medicine.
* It's distributed in the mountains of Sichuan, southwestern China north and east to eastern
Siberia, Alaska and northern Canada east to northern Quebec.
* The plant contains arbutin, ursolic acid, tannic acid, gallic acid, some essential oil and
resin, hydroquinones (mainly arbutin, up to 17%), tannins (up to 15%), phenolic glycosides
and flavonoids.
* Arbutin is extracted from the bearberry plant in the genus Arctostaphylos.
* It inhibits tyrosinase and thus prevents the formation of melanin. Arbutin is therefore used as a
skin-lightening agent.
* There are 2 types of arbutin, they are alpha-arbutin and beta-arbutin. The Inhibition of tyrosinase activity of alpha-arbutin is 10 times stronger than beta-arbutin.
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