A labeled metabolite of 17B-Estradiol.Melting Point:250-253°CSolubility:Sparingly Soluble in Chloroform and MethanolMethod for Determining Identity: Proton NMR (CDCl3) and MSTLC Conditions: SiO2; Dichloromethane : Methanol (9 : 1). Visualized with UV(faint) and AMCS (single spot; Rf=0.6).Storage and Stability:Store at -20°C. For maximum recovery of product, centrifuge the original vial prior to removing the cap.