... %,50%,70% ,80%,98% Test Method: HPLC White Willow Bark Extract/Salicin/Salix alba L White Willow Bark ExtractProduct Name : White ... LBotanical Source: White Willow BarkPart Used: BarkAppearance: Yellow or white Powder Active Ingredient: SalicinSpecification: Salicin 15%, 25%,50%,70% ,80%,98 ... direct strong light.Shelf Life: 2 years White Willow Bark Extract/Salicin/Salix alba L