10.22376/ijpbs.2019.10.1.p1-12 Volume 3 Issue 1 2012 (January - March) lessThan i greaterThan Acacia catechu willd lessThan /i greaterThan (Family: lessThan i greaterThan Fabaceae lessThan /i greaterThan and subfamily: lessThan i greaterThan Mimosoideae lessThan /i greaterThan ) known as Black cutch has a diverse pharmacological and phytochemical importance. It is a potent medicinal plant in the traditional Indian medicinal systems. The leaves, bark, heartwood had many nutritional and medicinal uses .The aim of our present study is to investigate the Estimation of Bioflavonoid Quercetin in lessThan i greaterThan Acacia catechu lessThan /i greaterThan Ethanolic Leaf extract by HPLC method. Lakshmi T. And Rajendran R. Acacia catechu leaf, pharmacological and phytochemical, Quercetin, HPLC. 171-178