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Environmental fate & pathways

Phototransformation in air

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Description of key information

Phototransformation in air is not relevant.

Key value for chemical safety assessment

Additional information

Based on QSAR calculations for the main components of 2-Butenedioic acid (E)-, di-C12-18-alkyl esters (CAS 68921-51-7) using AOPWIN v1.92, the substance is susceptible to indirect photodegradation in air. The estimated half time for the reaction with OH-radicals is in the range of 6.81 - 9.96 hours (24h day; OH-concentration: 0.5E+06 OH/cm3). However, photodegradation is not expected to be an important environmental fate process since the main components of the substance are not evaporate into the atmosphere due to their low vapour pressures of < 0.001 Pa at 20 °C.