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Environmental fate & pathways

Bioaccumulation: aquatic / sediment

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Description of key information

BCF: 113.1 - 484.3 L/kg (BCFBAF v3.01)

Key value for chemical safety assessment

Additional information

No experimental studies investigating the bioaccumulation potential of isononyl isononanoate are available. Therefore, the bioaccumulation factor (BCF) of all components of the UVCB substance was estimated using a reliable QSAR model (BCFBAF v3.01; Müller, 2011). All components were in the applicability domain of the model indicating that the results are reliable and can be used to assess the bioaccumulation potential of isononyl isononanoate. The BCF was calculated to be in the range of 113.1 - 484.3 L/kg (upper trophic) using the model of Arnot-Gobas which includes biotransformation. Exclusion of biotransformation resulted in clearly higher BCF values of 3937 - 13060 L/kg. Thus, it can be concluded that the substance will be extensively metabolized (half-life of 1.26 - 2.39 d) which reduces the bioaccumulation potential significantly. In conclusion, due to the estimated BCF values including biotransfomation, isononyl isononanoate has a low potential for bioaccumulation, asthe highest calculated BCF of 484.3 L/kg is clearly below the trigger value of 2000 L/kg to be classified as bioaccumulative (B-criterion; ECHA Guidance R.11, 2012).