We are the only plant of ESCIN commercial process in China. Assay: 20% 95%-103% Source: Horse Chestnut seed Appearance: off-white to white powder Molecular Formula: C54H84O23 Molecular Weight: 1101.23 CAS Number: 6805-41-0 Fuction: Escin has antiexudative, antiinflammatory, venotonic effects. It can be used in skin care products.