Product Details : A flavonol widely distributed in plants. It is an antioxidant, like many other phenolic heterocyclic compounds. Glycosylated forms include RUTIN and quercetrin. Synonyms: Quertine, 3,3',4,5,7-Pentahydroxyflavone, Quercetine Molecular Formula: C15H10O7 Molecular Weight: 302.24 CAS No.: 117-39-5 Specifications: Botanical Origin: Sophora japonica L. - Bud Identification: Positive by TLC Appearance: Yellow powder Melting point: 305 - 315 degree Celsius Assay: Quercetin 98% Min. (HPLC) Moisture: 9.0% - 12.0% Ash: 0.2% Max. Heavy Metals: 20ppm Max. Total Aerobic Count: 1,000cfu/g Max. Yeast & Mold: 100cfu/g Max. E. coli: Negative Salmonella: Negative Packing: 25kgs/Fibre drum, two plastic-bags inside Storage: Stored in a well-closed container away from moisture and light Shelf Life: Two years