Atorvastatin impurity. An oxidative degradation product of Atorvastatin.Melting Point:179-182°CSolubility:ChloroformMethod for Determining Identity: Proton NMR (CDCl3), 19F NMR (CDCl3), and MSTLC Conditions: SiO2; Hexane: Ethyl Acetate (3:2); Visualized with UV and AMCS. Single spot (Rf= 0.7). Storage and Stability: May be stored at RT for short-term only. Long-term storage is recommended at 4°C. For maximum recovery of product, centrifuge the original vial prior to removing the cap.