A sensitive search for organics (CH4, CH3OH, H2CO, C2H6, C2H2, C2H4), hydroperoxyl (HO2), nitrogen compounds (N2O, NH3, HCN) and chlorine species (HCl, CH3Cl) on Mars using ground-based high-resolution infrared spectroscopy

► A comprehensive search for organics and trace species on Mars. ► For most of the targeted species we derived the most stringent upper limits ever obtained. ► We sampled the same regions where plumes of methane have been recently observed.