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Environmental fate & pathways

Bioaccumulation: aquatic / sediment

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Description of key information

Significant bioaccumulation of the submission item in organisms is not expected.

Key value for chemical safety assessment

BCF (aquatic species):
14.09 dimensionless

Additional information

No experimental data on the bioaccumulation behavior of the submission item are currently available. This multiconstituent substance consists of components with log Pow values > 3. Log Pow values in that magnitude signalize that an accumulation in organisms cannot be excluded. Hence, the bioaccumulation potential of the test compound was investigated using three scientifically acceptable calculation models:

A calculation using CATALOGIC v.5.11.2, BCF base-line model v2.05 was conducted with a representative molecule structure in order to estimate the bioaccumulation potential of the test substance. This model calculates the BCF implicating the measured log Kow value and the water solubility of the test substance. Furthermore, the influence of mitigating factors like ionization of the molecule, water solubility, size and metabolism are also considered by the model. Taking into account these mitigating factors the BCF is reduced to approx. 6.6, mainly due to metabolism, size and water solubility.

In a second calculation the calculation model T.E.S.T., provided by the US EPA, was applied (v4.1). This model predicts a bioaccumulation factor of 7.33 (log BAF of 0.86) for the test compound.

For the third calculation the BCFBAF v.3.01 of EPISuite v4.10 was used. The calculation revealed a BCF value of 35.

Based on these data, the registration item is not considered to significantly accumulate in organisms.