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EC number: 201-204-4
CAS number: 79-41-4
In water methacrylic acid will be rapidly biodegraded, abiotic
degradation is not expected. Because MAA is almost completely
dissociated at neutral pH, it is not expected to evaporate into the air
to any significant degree. After exposure to or emission into air MAA
will be rapidly degraded by photochemical processes. Based on a log Pow
of 0.92, bioaccumulation of MAA is not expected. Due to the low logKoc
for different soil types adsorption to the solid soil phase of MAA is
unlikely. Furthermore, based on
a Mackay Level 1 calculation the substance will mainly distribute into
air (ca. 91.5 %).
Regarding atmospheric fate the
EU ESR on MAA concluded: "Due to the fast atmospheric photooxidation and
the low resulting concentrations in air, adverse effects on organisms
and abiotic effects upon the atmosphere, like global warming and ozone
depletion are not expected from methacrylic acid (conclusion (ii))".
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