The potential of isocyanic acid as a fuel for a short-wavelength chemical laser has been investigated. The experiments were performed by carrying out reactions of F atoms with HNCO to obtain NCO radicals and with coreagents of the type RHn.to obtain R atoms. The NCO + R reactions occurred subsequently. The resulting chemiluminescence was observed to detect electronically excited NR* and other significantly emitting species. Eight coreagents, namely CH4, H20, PH3, NH3, HC1, HBr, SiH4 and B2H6, have been studied in this manner. The results indicate that the NCO radicals react with C, 0 and P atoms to generate the corresponding NR* species. Photon yields from these species have been determined. The CN(B X) photon yield was found to be the highest of all of these, however, the absolute value of the CN(B X) photon yield is low which may be due to the inefficiency of the C-atom production from the F + CH4 reaction. Research is being carried out to develop an efficient C-atom source.