Radix Isatidis Extract Details Product Name: Radix Isatidis Extract Herb Source: Isatis tinctoria L.; Isatis indigotica Fort; Baphicacanthus cusia (Nees) Brem. Part Used: Root, Stem Appearance: Yellow-brown Powder Specification: 5:1, 10:1 Test Method: TLC What Is Radix Isatidis Extract ? Radix Isatidis (Banlangen in Chinese), as the Traditional Chinese Medicine (TCM), is a kind of dried root of the plant …