Molar absorptivities of SbCl3(g), SbCl5(g), and SbBr3(g) are reported at 10 nm intervals in the wavelength range 200-400 nm. Absorbances of SbBr3 + Br-2 vapor mixtures, with a Br-2 concentration of 6.16 mM . L(-1), give no indication of contributions from SbBr5. Absorbances of SbCl3 + Br-2 vapor mixtures are discussed. Equilibrium vapor pressures of antimony(III) bromide are derived from absorbance data and are compared with the results of previous researchers : liquid phase, ln(P/bar) = 7617(+/-1.5%)/(T/K) + 13.96(+/-2.1%), range 370-417 K; solid phase, ln(P/bar)= 8290(+/-2.9%)/(T/K) + 15.83(+/-4.3%), range 330-370 K.