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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Environmental fate & pathways

Adsorption / desorption

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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 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.  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

Koc at 20 °C:
831 977 333

Additional information

The Koc is considered to be 8.32E+9. This figure is, however, too large for IUCLID5 to support.

The alkaryl benzene sulfonates are a group of inter-related substances of similar structure typically consisting of a benzene ring with a sulphonic acid which may be present as the free acid or metal substituted salt and one or more long chain alkyl groups that may vary in length and the degree of branching. The alkaryl benzene sulfonates are produced in base oils from petroleum streams and display similar chemistry, characterised typically as relatively high melting glass like substances, in the absence of the mineral oil, extremely low water solubility and very high partition coefficient.

The presence of mineral oil, however, alters the physical appearance from solid to liquid, soit is not technically feasible to conduct a study to measure the soil adsorption of the substance. Estimations have, therefore, been undertaken using the EPIWIN Modelling Program. To allow for a weight of evidence approach estimations have been made for all suitable molecular variations in the series alkaryl benzene sulfonates. For the purpose of additional relaibility, the result given above is a mean average melting point value calculated by QSAR across the series of structurally related 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