Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

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 alkyrated 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. Based on QSAR, the partition coefficient of the substance is considered to be 22.17. A partition coefficient in excess of 4.5 is considered to be of concern as potential for bioaccumulation, according to screening criteria for bioaccummulation in ECHA guidance (Chapter R.11 PBT Assessment). The likely reliability of the log Pow is, however, considered to diminish above a value of 6, as noted in Appendix R.11-1 Annex 1 of ECHA guidance on PBT Assessment. Substances with log Pow between 4.5 and 6 are considered likely to be highly accumulating; however no substantial bioconcentration is assumed for compounds having log Pow with values less than 4.5 or greater than 6. For compounds having log Pow greater than 6, a gradual decrease of the BCF is observed and it has been hypothesised within the published literature that a high log Pow is more an effect of solubility than a tendency of the substance to be lipophilic. This is further supported by the estimation based on EPIWIN that the BCF is 70.79, considerably below the threshold of concern derived by the REACH criteria of 2000 (B) and 5000 (vB). Furthermore, controls required for the use of the material are designed ensure no exposure of the substance to the aquatic environment removing any opportunity for bioaccumulation. It is therefore considered that the substance is considered to not have the potential to bioaccumulate and it is therefore not scientifically justified to undertake a study in fish.