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Environmental fate & pathways

Bioaccumulation: aquatic / sediment

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Description of key information

The registered substance is produced, supplied and marketed in the presence of a liquid mineral oil solvent. Removal of this solvent is expected to cause a change in the equilibrium of the chemical structure of the alkaryl benzene sulfonates resulting in a degradation of the chemical structure to a structure that is not representative of the substance being placed on the market in the EU. It is, in consequence, not possible to undertake any study of the registered substance in the absence of the solvent. This is further compounded by the fact that the presence of the mineral oil solvent changes the physical state of the registered substance from solid to liquid and will therefore have a considerable effect on the result of any test conducted on the substance in solvent. It is therefore considered justifiable to omit any study, but the results from QSAR are included to allow for a weight of evidence approach.

Key value for chemical safety assessment

BCF (aquatic species):
70.8 L/kg ww

Additional information

The registered substance is produced, supplied and marketed in the presence of a liquid mineral oil solvent. Removal of this solvent is expected to cause a change in the equilibrium of the chemical structure of the alkaryl benzene sulfonates resulting in a degradation of the chemical structure to a structure that is not representative of the substance being placed on the market in the EU. It is, in consequence, not possible to undertake any study of the registered substance in the absence of the solvent. This is further compounded by the fact that the presence of the mineral oil solvent changes the physical state of the registered substance from solid to liquid and will therefore have a considerable effect on the result of any test conducted on the substance in solvent. It is therefore considered justifiable to omit any study, but the results from QSAR are included to allow for a weight of evidence approach.

The QSAR assessment has been conducted on 50 possible structures with n=10 and n=16 in various ring locations e.g. c2(CCCCCCCCCC)ccc(cc2)S(=O)(O[Mg]OS(=O)(=O)c(ccc1CCCCCCCCCC)cc1)=O. The data presented is a mean of the 50 separate assessments of differing possible structures to provide for increased reliability using both the EPI Suite and CAESAR models.

In addition, further assessment has been conducted of partition coefficient data based on the testing of products and assessment by QSAR. All data available are supportive of the assessment that the substance is not bioaccumulative.

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