... Betula platyphylla 3.Specification:Betulin(CAS:473-98-3) 50%,70%,90%,98% 4, GMO Main Function1. Adaptogenic and immunomodulating ... platyphyllaPart usedBarkCountry of originChina ANALYSISSPECIFICATIONAppearanceWhite PowderOdorCharacteristicTastedCharacteristicExtract SolventsEthanol Assay(HPLC)Betulin≥70%Sieve AnalysisNLT 100% pass 80 meshLoss on Drying<5 ... . Birch Bark Extract Betulin(CAS:473-98-3) 70%