science-softCon uv/vis+ photochemistry database; www.photochemistry.org; (C) science-softCon 2019 Substance: n-butyraldehyde Other Names: butanal Formula: C4H8O CAS-No.: 123-72-8 Study: near-UV molar absorptivities Authors: H. Xu, P.J. Wentworth, N.W. Howell, J.A. Joens Title: Temperature dependent near-UV molar absorptivities of aliphatic aldehydes and ketones in aqueous solution Journal/Source: Spectrochim. Acta Part A: Molecular Spectroscopy, 49, 1171-1178, (1993); doi:10.1016/0584-8539(93)80076-M Data: Energy/Wavelength range: > 200 nm Resolution: 2 nm Temperature: 6.5 – 69.5 °C (8 temperatures) Temperature dependence: yes Pressure/Concentration: Phase: aqueous solution pH: Comments: Temperature dependent molar absorptivities are reported for acetone, 2-butanone, 2-pentanone, 3-pentanone, acetaldehyde, propionaldehyde, and n-butyraldehyde in aqueous solution. Molar absorptivities are given at eight temperatures in the range 6.5–69.5°C for wavelengths greater than 200 nm, a spectral resolution of 2.0 nm, and a spacing of 2.5 nm. Author to whom correspondence should be addressed: (e-mail address):