... : 15% salicin, 25% salicin, 50% salicin HPLC Common names White Willow Bark Extract Specification 15% salicin, 25% salicin, 50% salicin ... HPLCCharacteristics Light brown-yellow powder Plant Origin Salix albaGeneral White willow bark has a long history of use for reducing ... 100 years ago, its active ingredient salicin was identified. White willow bark is a source of salicin and other salicylates ...