The flash-photolysis of OCS in the presence of CO2,Ar or an inorganic fluoride (especially SF6, NF3, XeF2) has permitted, in absorption, detection of S2(f1Δu-a1Δg). In the presence of oxygen and at a low total pressure, some previously unreported bands involving vibrationally-excited levels of the lower state have been detected. In addition, when XeF2 or NF3 was present, a further transient spectrum (λλ3200-3900Å) was observed under isothermal conditions, the carrier being most probably SF. No spectrum assignable to XeF or NF was detected.