Latin Name: Polygonum Cuspidatum Appearance:Offwhite yellowish Powder Test Method:HPLC Part of the Plant Used: Root & Rhizome of Polygonum cuspidatum Sieb. et Zucc. Extract Method:Alcohol Applicable field:Medicine Assay:10%--99% Active material: Resveratrol Molecular Formula :C14H12O3 Molecular Weight:228.24 Melting point: 253^oC-255^oC Solubility: soluble in diethyl ether, Chloroform, Etheyl alcohol, Acetone Packing: Double-deck plastic bag, pack with aluminium foil paper outside Particle size:100 mesh Shelf Life : 2 years under well Storage situation and stored away from direct sun light.