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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

Experimental results on phototransformation of 2-ethyl-2-[[(1-oxoheptyl)oxy]methyl]propane-1,3-diyl bisheptanoate (CAS 78-16-0) are not available. A calculation using AOPWIN v1.92 indicates that the substance will be rapidly photodegraded by reaction with hydroxyl radicals with an estimated half-life of 15.68 hours (24 h day; OH-concentration: 0.5E+06 OH/cm³; Blum, 2011). However, due to the low vapour pressure (<0.0001 Pa, SPARC v 4.5 calculation) dispersal of the substance to the atmosphere is unlikely. Therefore indirect photodegradation is expected to be not relevant for the substance. 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 the substance.