Hi dear friend, Nice day to you. We are a factory of Black Peper Extract Powder Piperine , glad to know you. Kindly see which purity meet your market and for how many quantity? So that we can back you best offer with COA at once. Product Name: Piperine Powder Botanical Name: Piper Nigrum L. CAS No.: 94-62-2 Specfication: 10%, 95%, 98% Appearance: Light-Yellow to off white fine powder Test Method: HPLC Any other product you need, please feel free to ask. Waiting for your prompt respond. Thanks & Best Regards Alice Lee (Sales Director) (USFDA & KFDA Approved) E-mail / Skype: sales@yherbal.com Mobile: +86-18092591328 QQ: 3471986192 Add.: No. 34 South Fenghui Road, Xi'an City 710075, Shaanxi Province, China.