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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).

Key value for chemical safety assessment

Additional information

No experimental studies investigating the phototransformation in air of 2,2-bis[[(1-oxoisononyl)oxy]methyl]-1,3-propanediyl diisononanoate (CAS 93803-89-5) are available. Results from AOPWIN v1.92 indicate that 2,2-bis[[(1-oxoisononyl)oxy]methyl]-1,3-propanediyl diisononanoateis susceptible to indirect photodegradation in air (Hopp, 2012). The estimated half-life for the reaction with OH-radicals is 13.35 h (24 h day; OH-concentration: 0.5E+06 OH/cm³). However, this is not expected to be a relevant environmental fate process, since the substance is not expected to be present in the atmosphere based on the low vapour pressure (< 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 and behaviour of the substance (Annex X requirement), no further testing is considered necessary for isononanoic acid, pentaerythritol.