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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 (< 0.0001 Pa at 20 °C).

Key value for chemical safety assessment

Additional information

No experimental studies investigating the phototransformation of fatty acids, vegetable-oil, esters with dipropylene glycol (CAS 95009-41-9) in air 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 7.21 - 8.06 h (24 h day; OH-concentration: 0.5E+06 OH/cm³) (Müller, 2014). However, this is not expected to be a relevant environmental fate process, since the substance is not expected to enter the atmospheric compartment based on the low estimated vapour pressure under ambient conditions (< 0.0001 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 andbehaviourof the substance, no further testing is considered necessary for fatty acids, vegetable-oil, esters with dipropylene glycol.