... Color:white to off-white powder 4)CAS No.: 528-43-8 5)Type:Powder Herbal Extract of Echinacea Powder Function:1. Inhibit secretion ... echinacoside and caffeic acid derivatives.2.Antiviral properties: Echinacea extract inhibits influenza, herpes and resicular stomatitis virues; antiviral activity ... , cold, urogenital infection, arthritis, snake bites and cancer. Herbal Extract of Echinacea Powder