Registration Dossier
Registration Dossier
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EC number: 221-259-8 | CAS number: 3048-64-4
Phototransformation in air
Administrative data
Link to relevant study record(s)
Description of key information
In the vapor phase, an atmospheric half-life of 87 min is predicted for VNB due to oxidation by photochemically produced hydroxy radicals. Half-life in the atmosphere due to reaction with ozone is predicted to be 78 min.
Key value for chemical safety assessment
- Half-life in air:
- 87 min
Additional information
AOPWIN software v1.92 calculates the hydroxyl radical rate constant for VNB to be 88.5E-12 cm³/(molecule*sec). This corresponds to a half-life of 0.121 days based on a 12 -hr day and a hydroxyl radical concentration of 1.5E6 OH/cm3 (ie 0.9 hrs). The dominant reaction is hydroxy radical addition to the olefinic bonds. The predicted rate constant for reaction with ozone is 21.200001 E-17 cm3/molecule-sec leading to a half life of 0.054 Days or 1.297 hours (based on an ozone concentration of 7E11 mol/cm3).
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