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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 low vapour pressure (0.00063 Pa).

Key value for chemical safety assessment

Additional information

No experimental studies investigating the phototransformation in air of Fatty acids, C16-18 (even numbered) and C18-unsatd., branched and linear, di- and triesters with trimethylolpropane (former CAS 85005-23-8) are available. Results from AOPWIN v1.92 indicate that the substance is susceptible to indirect photodegradation in air. The estimated half-life for the reaction with OH-radicals is 1.5 - 6.1 h (24 h day; OH-concentration: 0.5E+06 OH/cm³) (Müller, 2013). However, this is not expected to be a relevant environmental fate process, since Fatty acids, C16-18 (even numbered) and C18-unsatd., branched and linear, di- and triesters with trimethylolpropane is not expected to enter the atmospheric compartment based on the low estimated vapour pressure under ambient conditions (< 0.00063 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 for Fatty acids, C16-18 (even numbered) and C18-unsatd., branched and linear, di- and triesters with trimethylolpropane.