Usage: Direct Antioxidant Activity, Estrogenic and Anti-estrogenic Activities. Effects on Biotransformation Enzymes and Cancer Prevent. Preservation of Normal Cell Cycle. Regulation, Proliferation and Induction of Apoptosis.Mol. Formula: C14H12O3Mol. Weight: 228.25CAS: 501-36-0Appearance: Brown PowderOdor CharacteristicAsh:max5%Pesticides Negative Heavy metals:max10PPMArsenic(As): max1PPMParticle size:100%through 80 meshMoisture :max%MicrobioiogicalTotal plate count :max1000cfu/gMold: max100cfu/gSalmgosellaNegativeE.Coli NegativeStorage: Keep in cool & dry place, Do not freeze. Away from strong light and heat.Shelf life: 2 years when properly stored.Contents supply:5%, 10%, 20%, 50%, 90%, 98%, 99%.Botanical Source: Polygonum cuspidatum Sieb. et Zucc