Add to ORKGInternational audienceEver since the Viking era, hydrogen peroxide has been suggested as a possible oxidizer of the Mars surface [1]. H2O2 was first detected in the submillimeter range [2], then regularly monitored, simultaneously with HDO, using high-resolution imaging spectroscopy at 8 μm with TEXES at IRTF [3]. Comparison with the Global Climate Models (GCM) shows that the observations favor the simulations taking into account heterogeneous chemistry [4]. New observations have been performed on H2O2 and HDO with TEXES at IRTF in February 2014, and on H2O and HDO with EXES on SOFIA in April 2014. The latter dataset, obtained near summer solstice, will be used to build a map of D/H on Mars