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EC number: 200-753-7
CAS number: 71-43-2
The atmospheric half life of benzene is
calculated to be 5.486 days based on a rate constant of 1.9498 x 10 -12
cm3molecule-1sec-1 and a hydroxyl radical concentration of 1.5E6 OHcm-3
based on the EPISUITE QSAR simulation (US EPA 2012).
Information on the atmospheric degradation
of benzene was taken from Perry (1977) and the EPISUITE QSAR (US EPA
2012). In Perry 1977, The absolute rate constants for the reaction of OH
radicals with a series of aromatic hydrocarbons in the gas phase over
the temperature range 296-473 K was determined using flash
photolysis-resonance fluorescence technique. Measured data from the
author were used to develop rate constants for the reaction of different
chemical with hydroxyl radicals. The rate constant has been used to
calculate the atmospheric half life of benzene.
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