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Environmental fate & pathways

Phototransformation in air

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Description of key information

After evaporation or exposure to air, methyl methacrylate will be rapidly degraded by photochemical processes.

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Additional information

The phototransformation of methyl methacrylate was investigated in several studies. The results of Saunders et al. (1992) and Howard (1991) showed a atmospheric halftime clearly below one day. Another calculation using EpiWin v4.00 AOP v1.92 showed a rate constant for the reaction of methyl methacrylate with hydroxyl radicals in the atmosphere of 18.34E-12 cm³/molecule*s. From this rate constant half-life for the reaction of OH radicals with the test substance is calculated as 6.997h assuming a 24h-day.

In conclusion, after evaporation or exposure to air, methyl methacrylate will be rapidly degraded by photochemical processes.