Fourier transform infrared measurements of bromine nitrate have been performed in the spectral region 675–1400cm−1 at 0.014cm−1 spectral resolution. Absorption cross sections were derived from 38 spectra covering the temperature range from 203 to 296K and air pressure range from 0 to 190mbar. For line-by-line analysis, further spectra were recorded at 0.00094cm−1 spectral resolution at 223 and 293K. The sample was synthesized from ClONO2 and Br2. Band strengths of the bands ν3 around 803cm−1 and ν2 around 1286cm−1 were determined from three pure BrONO2 measurements at different temperatures and pressures. Number densities in the absorption cell were derived from pressure measurements of the purified sample taking into account small amounts of impurities determined spectroscopically. Resulting band strengths are Sν3=2.872(52)×10−17cm2molec−1cm−1 and Sν2=3.63(15)×10−17cm2molec−1cm−1. Absorption cross sections of all measurements were scaled to these band strengths. Further data reduction was achieved with an interpolation scheme based on two-dimensional polynomials in ln(pressure) and temperature. The database is well-suited for remote-sensing application and should reduce the atmospheric bromine nitrate error budget substantially.