Detailed offer Description Gromwell Root P.E Source: Any of various white willow branches and leaves of suoicacae plants, having springtime catkin and deciduous arbor, originally native to middle and southern part of Europe and are mainly distributed in North Africa and Asia. White willow is as tall as 25 meters with grey bark and deep crack. Used Part: Branches and leaves Active Ingredient: Salicin CAS No.: 138-52-3 Specification: 15%, 25%, 30%, 50%, 98% (HPLC) Physical and Chemical properties: Appearance: Yellow brown power Molecular formula: C13H18O7 Function: Anti-inflammation, pain relief, fever relief, anti-rheumatism and function of constringency Usage: Medicine Shelf Life: 2 years Storage: Protect from light. Store in cool and dry places Package: 25Kg/drum