Perfluoropropionic acid (CF₃CF₂C(O)OH) will be investigated with a focus on its com-plex structural properties. As a formal derivative of propanoic acid, the incorporation of fluorine atoms imparts unique structural features, including three distinct mono-meric conformations and a dimeric structure. This study presents experimental find-ings, supported by computational modeling, to explore these characteristics. The anal-ysis includes an FTIR study of the isolated species in an Ar-cryogenic matrix and the low-temperature determination of its crystalline structure using single-crystal X-ray diffraction.