science-softCon uv/vis+ photochemistry database; www.photochemistry.org; (C) science-softCon 2019 Substance: glycolaldehyde Other Names: acetaldehyde, hydroxy- Formula: C2H4O2 CAS-No.: 141-46-8 Study: uv absorption spectra, photolysis, quantum yields Authors: C. Bacher, G.S. Tyndall, J.J. Orlando Title: The atmosperic chemistry of glycolaldehyde Journal/Source: J. Atmos. Chem., 39, 171-189, (2001); doi:10.1023/A:1010689706869 Data: table, diagram Energy/Wavelength range: 205 - 335 nm Resolution: Temperature: 298 K Temperature dependence: no Pressure/Concentration: Phase: gas pH: Comments: The UV spectrum peaks at 277 nm with a maximum cross section of (5.5± 0.7) ×10-20 cm2 molecule-1. Studies of the ultraviolet photolysis of glycolaldehyde (lambda = 285 ± 25 nm) indicated that the overall quantum yield is > 0.5 in one bar of air, with the major products being CH2OH and HCO radicals. Author to whom correspondence should be addressed: (e-mail address):