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Resveratrol is a polyphenolic compound with strong activity. Resveratrol is a non-flavonoid polyphenolic compound containing astragalus structure.It is an important plant antitoxin.Polygonum cuspidatum is rich in resveratrol and polydatin , which is an antitoxin produced by many plants under biological or abiotic stress (such as fungal infection, ultraviolet radiation, etc.).
Resveratrol ’s chemically named 3, 5, 4 '-trihydroxystilbene , molecular formula is C14H12O3, molecular weight is 228.25 kD, it is colorless acicular crystal, insoluble in water, easily soluble in polar solvents such as ethanol, ethyl acetate, and acetone .The form of the resveratrol in nature there are four main: cis and trans resveratrol, cis and trans glycosides, resveratrol glucoside trans-isomer under uv irradiation can be converted into cis isomer, the trans isomer of physiological activity is greater than the cis isomers, monomer reactivity is greater than the glycoside, resveratrol in plants are usually in the form of stable trans indican .Resveratrol is unstable under light. Trans-resveratrol can be stable in ethanol for several months when it is completely out of light, but is less stable only under high pH(≥10).Trans-Resveratrol was stable only at neutral pH under dark conditions.
The main steps of our company's resveratrol extraction are as follows: firstly, pretreated the polythene, then extracted with ethyl acetate, then concentrated flow extract, then impurities are removed with ethanol, then carried out centrifugation, and the dry extract is obtained by pressure compression.It was then dissolved in ethanol, decolorized with aluminum and carbon, crystallized with 95% ethanol, and centrifuged to obtain the separated dry extract.
If you need wholesale polygonum cuspidatum resveratrol certified Kosher and Halal or for any inquiry or further information, welcome contact [email protected]. Natural Field Ltd. would always provide you an all-in-one solution.