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Environmental fate & pathways

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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))".