Time-resolved UV–vis absorption spectroscopy (TRUVVAS) has been coupled with 248nm laser flash photolysis (LFP) of Cl 2 CO in the presence of CS 2 (and in some cases O 2 , NO or NO 2 ) to generate the CS 2 Cl radical adduct in the gas phase and study the spectroscopy and kinetics of this species. CS 2 Cl is found to possess a strong absorption band at λ max ≈365nm with σ max =(2.3±0.7)×10 −17 cm 2 molecule −1 (base e) and a weaker band at λ max ≈480nm; the gas-phase spectrum of CS 2 Cl is very similar to the previously reported liquid-phase spectrum in CCl 4 solvent. Reaction of CS 2 Cl with O 2 is found to be very slow; our data suggest that the rate coefficient for this reaction at 240K is less than 5.0×10 −18 cm 3 molecule −1 s −1 . Rate coefficients for CS 2 Cl reactions with CS 2 Cl (k 3 ), NO (k 5 ), and NO 2 (k 6 ) were measured at 240K and, in units of 10 −11 cm 3 molecule −1 s −1 , were found to be 2k 3 =15±6, k 5 =2.2±0.5, and k 6 =1.3±0.4, where the uncertainties are estimates of accuracy at the 95% confidence level.