Product Description: Our Reference Specification, for more details, pls contact us for COA, MSDS and certification: Email & Skype: Item Standard Test Results Identification A.H-NMR:Comply with the structure Complies B.LC-MS:Comply with the structure Complies C.The IR spectrum of sample should be identical with that of reference standard. Complies D.HPLC-ESI-MS The retention time of the major peak in the chromatogram of the Assay preparation corresponds to that in the chromatogram of the Standard preparation, as obtained in the Assay. Complies Loss on drying 2.0% 0.19% Heavy metals 10 ppm