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Environmental fate & pathways

Phototransformation in air

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Description of key information

After evaporation or exposure to the air, the substance will be rapidly degraded by photochemical processes.

Key value for chemical safety assessment

Half-life in air:
10.6 h
Degradation rate constant with OH radicals:
0 cm³ molecule-1 s-1

Additional information

The half-life for the reaction of OH radicals with the test substance methacrylic anhydride is calculated as 10.6 hours assuming a 24h-day (0.5E6 OH/cm³). Thus, after evaporation or exposure to the air, the substance will be rapidly degraded by photochemical processes.