Registration Dossier
Registration Dossier
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EC number: 254-384-1 | CAS number: 39255-32-8
Phototransformation in air
Administrative data
Link to relevant study record(s)
Description of key information
Key value for chemical safety assessment
- Half-life in air:
- 2.019 d
Additional information
The decomposition rate constant of Ethyl 2-Methylvalerate (EMV) in air occurring through reaction with hydroxyl radicals was estimated according to the method of Atkinson using the Atmospheric Oxidation Program (AOPWIN version 1.92, US EPA). This method estimates the rate constant for the atmospheric gas-phase reaction between photochemically produced hydroxyl radicals and organic chemicals and between ozone and olefinic/acetylenic compounds (Aimee Collett 2013).
The decomposition rate constant of EMV in air following reaction with hydroxyl radicals was calculated to be 5.2978 x 10-12cm3molecule-1sec-1. Assuming that the 12 hour daytime hydroxyl radical concentration is 1.5 x 106molecules. cm-3, the half-life was calculated to be 2.019 days (12 hour day).
The calculation of the decomposition rate constant of EMV in air following reaction with ozone was not carried out as this calculation is only applicable to olefins and acetylenes.
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