science-softCon uv/vis+ photochemistry database;	www.photochemistry.org; (C) science-softCon 2019

Substance: methylglyoxal				Other Names: propanal, 2-oxo-

Formula: C3H4O2; CH3COCHO				CAS-No.: 78-98-8

Study: uv absorption, photolysis, quantum yields


Authors: T.A. Staffelbach, J.J. Orlando, G.S. Tyndall, J.G. Calvert

Title: The UV-visible absorption spectrum and photolysis quantum yields of methylglyoxal

Journal/Source: J. Geophys. Res., 100, 14189-14198, (1995); doi:10.1029/95JD00541 


Data: table, diagram

Energy/Wavelength range: 205 - 474 nm

Resolution: 

Temperature: 248 K, 273 K, 298 K

Temperature dependence: yes

Pressure/Concentration:

Phase:

pH:


Comments: The UV/visible absorption across sections of MGLY as a function of wavelength have been measured at 
three different temperatures, 248 K, 273 K, and 298 K.
The absorption cross sections show only small variations (<=10%) over this temperature range.
The quantum yields and products of the photolysis are reported for various wavelength bands between 240 and 480 nm.
The dominant pathway for photolysis at wavelengths relevant to the troposphere produces two radicals, CH3COCHO+hv -->CH3CO+HCO.

Author to whom correspondence should be addressed: (e-mail address):