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[product name]: ursolic acid, loquat leaf extract
[English name]: loquat leaves extract
[extract part]: loquat leaf extract is the leaf of Ligustrum lucidum or loquat of Rosaceae.
[Specification]: 5:1,10:1,20:1 or 25%, 50%, 90%, 95%, 98% ursolic acid
[product properties]: brown powder to white fine powder
[test method]: UV HPLC
[shelf life]: two years
[package description]: double plastic bag plus cardboard barrel (25kg / barrel)

[about ursolic acid]:
The results show that α - arbutin can inhibit the activity of tyrosinase at a very low concentration, its intensity is nearly 10 times that of β - arbutin, and its inhibitory effect on tyrosinase is better than that of β - arbutin.
[physical properties]:
Ursolic acid is a kind of pentacyclic triterpenoid compound existing in natural plants, which has a high content of glossy prismatic (anhydrous ethanol) or fine hairy needle crystal (dilute ethanol) and a low content of brown yellow or yellow green powder, with a special smell.
It is soluble in dioxane, pyridine, methanol, ethanol, butanol, butanone, slightly soluble in acetone, slightly soluble in benzene, chloroform, ether, insoluble in water and petroleum ether.
[chemical properties]:
was extracted from the whole grass of Prunella vulgaris L., the leaves of Ilex rotunda Thunb.