... : Salix alba L. 3.Specification:Salicin(CAS:138-52-3)15%,50%,90% 4.GMO FREE Main Function1. It has the ... originChina ANALYSISSPECIFICATIONAppearanceBrown Powder OdorCharacteristicTastedCharacteristicExtract SolventsWater and Ethanol Assay(HPLC)Salicin≥15%Sieve AnalysisNLT 100% pass 80 meshLoss on Drying<5%Ash ... stored. White Willow Bark Extract Salicin(CAS:138-52-3)15%