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2-aminooxazole (2AO), a N-heterocyclic molecule, has been proposed as anintermediate in prebiotic syntheses. It has been demonstrated that it can besynthesized from small molecules such as cyanamide and glycoaldehyde, which arepresent in interstellar space. The aim of this work is to provide infraredspectra, in the solid phase for conditions typical of astrophysicalenvironments and to estimate its stability toward UV photons and cosmic rays.Infrared (4000-600 cm$^{-1}$) absorption spectra at 20 K, 180 K, and 300 K, IRband strengths, and room temperature UV (120-250 nm) absorption spectra aregiven for the first time for this species. Destruction cross-sections of 9.510$^{-18}$ cm$^2$ and 2 10$^{-16}$ cm$^2$ were found in the irradiation at 20 Kof pure 2AO and 2AO:H$_2$O ices with UV (6.3-10.9 eV) photons or 5 keVelectrons, respectively. These data were used for the estimate of half-lifetimes for the molecule in different environments. It is estimated that 2AOcould survive UV radiation and cosmic rays in the ice mantles of dense cloudsbeyond cloud collapse. In contrast, it would be very unstable at the surface ofcold Solar System bodies like Kuiper belt objects, but the molecule could stillsurvive within dust grain agglomerates or cometesimals.

2-aminooxazole in astrophysical environments: IR spectra and destruction cross sections for energetic processing