Product Name: Resveratrol Resyeratrol(trans-3, 4, 5-Trihydroxystilbene) Polygonum cuspidatum Sieb. Et CAS: 501-36-0 Assay(HPLC): 20%, 50%, 80%, 98% Appearance: White powder Loss on drying: 1.0%max Ash: 0.5%max Particle size: 100% pass 80 mesh We supply Resveratrol with competitive price in world market. If you need any inquire of our products, please do not hesitate to ask us.