science-softCon uv/vis+ photochemistry database; www.photochemistry.org; (C) science-softCon 2019 Substance: acetic acid Other Names: methanecarboxylic acid; hydrogen acetate Formula: C2H4O2; CH3COOH CAS-No.: 64-19-7 Study: uv absorption cross sections Authors: J.J. Orlando, G.S. Tyndall Title: Gas phase UV absorption spectra for peracetic acid, and for acetic acid monomers and dimers Journal/Source: J. Photochem. Photobiol. A: Chem., 157, 161-166, (2003); http://dx.doi.org/10.1016/S1010-6030(03)00067-4 Data: table, diagram Energy/Wavelength range: 205 - 350 nm Resolution: Temperature: 298 K Temperature dependence: no Pressure/Concentration: 0.12 - 3.6 Torr Phase: gas pH: Comments: Absorption cross sections have been determined in the UV spectral region (205-350 nm) for gas phase acetic acid (CH3C(O)OH) in its monomeric and dimeric forms (270-345 K), as well as for peracetic acid (CH3C(O)OOH, 248 and 298 K). The 298 K monomer spectrum consists of a maximum near 207 nm (sigma=1.4×10-19 cm2 per molecule), with monotonically decreasing cross sections at longer wavelengths. The dimer spectrum possesses a maximum located short of 205 nm, with a peak intensity about double that of the monomer. Author to whom correspondence should be addressed: (e-mail address):