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Environmental fate & pathways

Phototransformation in air

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Description of key information

Not relevant due to low vapour pressure

Key value for chemical safety assessment

Additional information

No experimental data evaluating the potential for photodegradation of Glycerides, C16-18 mono-, di- and tri- (CAS No. 91052-54-9) in air are available. Since the substance is an UVCB substance, QSAR calculations using the AOPWIN v1.92 program have been performed on representative fatty acid components (C16 and 18 mono-, di- and tri-), resulting in estimated half-lives (DT50 values) ranging from 5.3to 10.9 hours (reaction with OH-radicals, 24h-day)(López Parrón, 2011). These values indicate that the substance is susceptible to undergo rapid indirect photodegradation in air. Nevertheless, this is not expected to be a relevant environmental fate process, since Glycerides, C16-18 mono-, di- and tri- is not likely to be present in the atmosphere in relevant amounts based on its estimated vapour pressure (< 0.0001 Pa at 20 °C).