* Product name: Quercetin
* Plant Source: Dried bud of Sophora Flavescens Ait.
* CAS#: 117-39-5
* Molecular Formula: C15H10O7
* Assay: 98% (by HPLC); 99% (by UV)
* Test Method: HPLC or UV
* Characteristic: yellow powder
* Shelf life: 24 Months