Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Partition coefficient

Currently viewing:

Administrative data

Link to relevant study record(s)

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

Log Kow (Log Pow):
at the temperature of:
25 °C

Additional information

The alkaryl benzene sulfonates are a group of inter-related substances of similar structure and chemical properties. Furthermore, the alkaryl benzene sulfonates have previously been assessed as a category approach under the Right to Know Initiative for HPV chemicals reviewed by the US EPA. It is therefore considered justifiable to undertake a similar approach to meet the requirements for REACH by reading across data between structurally related compounds.

As discussed above, it is not technically feasible to conduct a study to measure the partition coefficient of the substance and so estimations have been undertaken using the EPIWIN Modeling Program. To allow for a weight of evidence approach estimations have been made for all suitable molecular variations in the series alkaryl benzene sulfonates. The result given above is an average partition coefficient value calculated by QSAR across the series of substances.

To further support this approach a QSAR Prediction Reporting Format (QPRF) is attached to justify the QSAR system as adequate for estimating the value for the purposes of REACH registration