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Environmental fate & pathways

Bioaccumulation: aquatic / sediment

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Description of key information

Due to the complex UVCB-compositions, an appropriate study including analytical monitoring is technically not feasible.
However, considering individual constituents, it can be assumed that the substance will bioaccumulate to a minor or moderate extent.

Key value for chemical safety assessment

Additional information

As the substance is a complex UVCB of long-chain (C-chain-length >=18) organic components, such as fatty alcohols, diols and wax ester, neither an appropriate analytical method is available, nor could it be developed for conducting a bioconcentration study, e.g. according to OECD guideline 305. Considering the main constituent octadecan-1-ol, a BCF of 1501 L/kg wet weight has been calculated using the BCFBAF-module (version 3.0) of EpiSuite4.0, while the module calculates lower BCF for molecules with longer C-chains, e.g. tetracosanol (CAS 506-51-4: BCF = 54.03 L/kg wet weight) or Lanolin wax (CAS 68200-49-0: BCF = 7.48 L/kg wet weight). This module is expected to give more realistic predictions of the bioaccumulation properties than predicting the BCF solely on the logPow, as the BCFBAF-module takes into account biotransformation and excretion via metabolisation.