The photochemistry of deuterated biacetyl adsorbed onto alkali halide films was the focus of this research. Biacetyl was deuterated and adsorbed onto films of KCl, NaBr, NaCl, and KBr at low pressures and temperatures. The adsorbed deuterated biacetyl was then irradiated for one-hour increments at temperatures of 13 K, 50 K, and 100 K. Fourier Transform Infrared spectra were taken after every photolysis, and in between photolyzing the sample at increasing temperatures of 5 K at a time. This was done to demonstrate the effect that increasing temperature has on the deuterated biacetyl and its photoproducts. Analysis of the spectra indicate the formation of carbon monoxide, ketene, and deuterated methane, although all of these photoproducts were not observed for every salt film. The number of photoproducts produced on a salt film is much lower than studies done in a matrix, in a gas phase, and on silver/quartz surfaces.