water soluble resveratrol 5%, 20%, 50%, 98%, 99% by HPLC
ethanol and water
100% pass 80 mesh
Packaging & Delivery
25kg/drum (double plastic bag inside and paper drum outside)
within 5 days after your payment (500kg in stock)
Giant knotweed extract
Used part: root/rhizome
Spec: water soluble resveratrol 5%, 20%, 50%, 98%, 99% by HPLC
Sinoway Industrial Co., Ltd.
state owned company which specialized in herbal extract industry since 1987.
Giant knotweed extract
Source: polygonum cuspidatum
Used part: root/rhizome CAS: 501-36-0 Spec: water soluble resveratrol 5%, 20%, 50%, 98%, 99% by HPLC
** Typical specification of giant knotweed extract ---- resveratrol 98% by HPLC
white fine powder
Corresponds to reference powder
≥95% through 80 Mesh
Loss on Drying
Complies with USP standard
Mold and Yeast
Absence in 10 g
Absence in 10 g
Resveratrol is naturally occurring phytoalexin produced by some higher plants in response to injury or fungal infection. Phytoalexins are chemical substances produced by plants as a defense against in faction by pathogenic microorganisms, such as fungi. Alexin is from the Greek, meaning to ward off or to protect, Resveratrol may also have alexin-like activity for humans, Epidemiological, in vitro and animal studies suggest that a high resveratrol intake is associated with a reduced incidence of cardiovascular disease, and a reduced risk for cancer.
(1)1kg/bag (1kg net weight, 1.2kg gross weight, packed in an aluminum foil bag; Outer: paper carton; Inner: double-layer PE)
(2)5kg/bag (5kg net weight, 5.2kg gross weight, packed in an aluminum foil bag; Outer: paper carton; Inner: double-layer PE)
(3)10kg/drum (10kg net weight, 12kg gross weight; Packed in a cardboard-drum with two plastic-bags inside; Drum Size: 310mm high, 400mm diameter)
(4)25kg/drum (25kg net weight, 28kg gross weight; Packed in a cardboard-drum with two plastic-bags inside; Drum Size: 510mm high, 350mm diameter)
(5)Customized package is available.
(1)Stored in a cool and dry well-closed container and in ventilated area,
(2)kept away from moisture and strong light or high temperature. (3)Two years under well storage situation and stored away from direct sun light.
4. How to Cooperate with Sinoway?
Main Buying Procedures:
(1)Enquiry: contact us by email, phone call, fax, Instant tools (Trademanager, MSN, Skype). (2)Discussion: specify the items you desire, confirm specification. (3)Quotation: Prices offered and accepted. (4)Place order as per contract or discussion. (4)Proforma invoice offered to double confirm the order for both-side records. (4)Payment settled. (5)Order completed under our arrangement. (6)Goods shipped as per contracted term. (7)Goods arrive at local port or warehouse, depending on contracted term. (8)Support & re-ordering.
(1)Payment: T/T, L/C, Western Union, ESCROW, Paypal. (2)Production lead time: within 2 weeks after your final confirmation. (3)Shipping methods: by air, by sea, by courie(FEDEX/DHL/EMS) (4)FOB dhipping port: Bejing, Tianjin, Shanghai, Hangzhou, Xiamen, Guangzhou
(4)CIP/CIF distination port: all over the world's main airport/seaport.
5. How Sinoway control the quality?
Because herbal extract products are enterprise standard, always we will send typical samples (usually 20g) for your testing by FEDEX/DHL/EMS.
** If the quality is confirmed by you, we insist on batch sample confirmation after your commercial order.
** If your testing result is different from us. We hope to exchange and unify the testing mothod, until the quality is confirmed by you. We also insist on batch sample confirmation after your commercial order.
Please kindly check the packages after you receive the goods, if you got wrong products/ quality problem/ short quantity, please get back to us as priority. Please note that you need to send us pictures of the defective items concerning this, and we will consider to replace or refund accordingly.
(1)No manufacturers had Chinse GMP for most herbal extract products, except milk thistle extract, ginkgo biloba extract, licorice extract, etc.
(2)Our manufacturer had nsf-GMP, ISO, HACCP, Kosher and HALAL for most of the herbal extract products.
(3)For some products, such as aloe vera extract, stevia extract, etc. Our manufacturer had organic certificate.
6. Sinoway's Service and Advantage
(1)Your inquiry related to our product & price will be replied within 24hours. (2)Well-trained & experienced staff are to answer all your inquiries in English of course. (3)Working time: 8:00am - 24:00pm, Monday to Sunday (UTC+8). (4)OEM & ODM projects are highly welcomed. We have strong R&D team here to help. (5)Your business relationship with us will be confidential to any third party. (6)Good after-sale service offered, please get back if you got question.
(1)6 years membership of ALIBABA. ----- Onsite check and Supplier assessment
(2)Certified by ISO9001:2008, SGS and Bureau Veritas.
(3)27 years and professional experience in herbal extract products.
(4)China office of Fischer Chemicals AG (Switzerland).