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EC number: 202-597-5
CAS number: 97-63-2
EMA does not possess UV-absorbing structures. Therefore, direct photolysis is not expected to occur to any significant degree.Photodegradation, with its short half-lifes is estimated to be the major sink for any methacrylic acid and all esters in the category released to the environment.
data does not exist on EMA. Experiments with model atmospheres with MMA
indicate a half-life of 2.7 hours in urban air and > 3 hours in rural
areas (determined in the presence of 0.2 ppm or 2 ppm of nitrogen oxides
with an initial concentration of 4 ppm of MMA (Joshi et al., 1982).
Therefore, by analogy to MMA, EMA is expected to degrade in the presence
of nitrogen oxides.
expected to photodegrade in the atmosphere either by reaction with
photo-chemically produced hydroxyl radicals or by reaction with ozone.
The reaction half-life for the atmospheric oxidation of EMA by hydroxyl
radicals range has been estimated to be 19.5 h. This is consistent with
a slight trend of shorter half-lifes with increasing molecular weight
within the category of lower methacrylate esters. For the reaction with
ozone an atmospheric half-life of approximately one day has been
calculated for all lower methacrylate esters, including EMA. A combined
reaction half-life is calculated to be 10.8 h.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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