【Product Name】:White Willow Bark Extract

【Botanical Name】:Salix Alba

【Part used】:Bark  

【Appearance】: Brownish Yellow or White powder

【Specification】: 4：1  10：1 /Regular Powder / Salicin 5-98%

【Storage Period】: 24 Months

【Package】: 1kg/bag 25kg/drum

【Test Method】: HPLC

【Storage Conditions】: Store in cool and dry places. Keep away from strong light and heat.

Description

White Willow is a medium-sized to a large deciduous tree growing up to 10–30 m tall, with a trunk up to 1 m diameter and an irregular, often-leaning crown. The bark is grey-brown and deeply fissured in older trees. The shoots in the typical species are grey-brown to green-brown.

The leaves are paler than most other willows, due to a covering of very fine, silky white hairs, in particular on the underside; they are 5–10 cm long and 0.5–1.5 cm wide. The flowers are produced in catkins in early spring and pollinated by insects.

It is dioecious, with male and female catkins on separate trees; the male catkins are 4–5 cm long, the female catkins 3–4 cm long at pollination, lengthening as the fruit matures. When mature in midsummer, the female catkins comprise numerous small (4 mm) capsules, each containing numerous minute seeds embedded in white down, which aids wind dispersal.

Chemical Composition

It mainly contain salicylates (primarily in the form of glycosides salicortin and salicin) and tannins.