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EC number: 203-727-3 | CAS number: 110-00-9
Phototransformation in air
Administrative data
Link to relevant study record(s)
Description of key information
Key value for chemical safety assessment
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An experimental rate constant for gas-phase reaction of furan with OH radicals in the atmosphere is 40.5E-12 cm3 molecule-1 s-1 (Atkinson, R. 1989, as cited in EPI AOPWIN v1.92),
which is equivalent to a half life of 9.5 hours (based on concentration of hydroxyl radicals in air of 5 x 105OH molecules/ cm3). An experimental rate constant for gas-phase reaction of furan with ozone in the atmosphere is 2.5X10-18 cm3 molecule-1 s-1 at 22 °C (Atkinson and Carter,1984, as cited in Pompe and Veber, 2001), which is equivalent to a half-life of 4.6 days (based on ozone concentration in air of 7 x 1011O3 molecules/ cm3). A rate constant for gas-phase reaction of furan with nitrate radicals in the atmosphere, determined using relative-rate technique, is 1.4X10-12 cm3 molecule-1 s-1 at 22 °C (Atkinson and Carter et al., 1985), equivalent to a half life of 0.3 hours (based on nitrate concentration in air of 5 x108NO3 molecules/ cm3).
References:
Atkinson, R., Carter, W.P.L., (1984). Kinetics and mechanisms of the gas-phase reactions of ozone with organic compounds under atmospheric conditions. Chemical Reviews 84, 437 - 470 (as cited in Pompe and Veber 2001)
Atkinson R, Carter WPL et al; (1985) Rate Constants for the Gas-Phase Reactions of NO3 Radicals with Furan, Thiphene, and Pyrrole at 295 ± 1K and Atmospheric Pressure; Environ Sci Technol 19: 87-9
Atkinson, R. (1989) Kinetics and mechanisms of the gas-phase reactions of the hydroxyl radical with organic compounds., J.Phys. Chem. Ref. Data, Monograph No. 1. NY: Amer. Inst. Physics & Amer. Chem Soc.(as cited in AOPWIN v1.92 2010)
AOPWIN v1.92a (September 2010) US Environmental Protection Agency
Pompe, M and Veber, M (2001)
Prediction of rate constants for the reaction of O₃ with different
organic compounds. Faculty of Chemistry and chemical Technology,
University of Ljubljana, Askerceva 5, 1000 Ljubljana, Slovenia.
Atmospheric Environment 35 (2001) 3781 - 3788.
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