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Environmental fate & pathways

Phototransformation in air

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Description of key information

Phototransformation in air is not relevant due to the low vapour pressure of this substance.

Key value for chemical safety assessment

Additional information

Based on a QSAR calculation using AOPWIN v1.92, Hexanoic acid, 2-ethyl-, C16-18 alkyl esters (CAS No. 90411-68-0) is susceptible to indirect photodegradation in air. The estimated half time for the reaction with OH-radicals is 12.53 to 13.81 hours (24h day; OH-concentration: 0.5E+06 OH/cm3). However, photodegradation is not an important environmental fate process since the substance is not expected to evaporate into the atmosphere due to its very low vapor pressure of < 0.01 Pa at 20 °C. As this study is not a standard information requirement in REACH and there is no indication from the chemical safety assessment (CSA) on the need to investigate further the fate and behaviour of the substance, no further testing is considered necessary.