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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 in air of 1,2,3-Propanetriol, homopolymer, diisooctadecanoate (CAS 63705-03-3) are available. Results from AOPWIN v1.92 for representative components of 1,2,3-Propanetriol, homopolymer, diisooctadecanoate indicate that the substance is susceptible to indirect photodegradation in air (Hopp 2011 and Marwitz 2012). The estimated half-lives for the reaction with OH-radicals are 3.96 - 10.17 h (24 h day; OH-concentration: 0.5E+06 OH/cm³). However, this is not expected to be a relevant environmental fate process, since 1,2,3-Propanetriol, homopolymer, diisooctadecanoate is not expected to be present in the atmosphere 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 according to Regulation (EC) No. 1907/2006 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 1,2,3-Propanetriol, homopolymer, diisooctadecanoate.