1-Oxo Ibuprofen, is a degradation product of Ibuprofen arising from oxidative and thermal treatments. 1-Oxo Ibuprofen is the Ibuprofen impurity J.Melting Point:85-87°CSolubility:Chloroform, MethanolMethod for Determining Identity: Proton NMR (CDCl3) and MSTLC Conditions: SiO2; Dichloromethane : Methanol : Acetic Acid (9 : 1 : 0.1). Visualized with UV and AMCS (single spot; Rf = 0.50).Storage and Stability:Store at -20°C. For maximum recovery of product, centrifuge the original vial prior to removing the cap.