By comparing the fluorescence intensity of XeCl(B-X), (C-A) and Xe2Cl as a function of the total gas pressures, the formation and quenching kinectics of discharge pumped Xe2Cl* have been quantitatively studied and the HCl deexcitation rate constant for Xe2Cl have been determined to be KHCl0=9.2×10-10cm3/sec.