Registration Dossier

Diss Factsheets

Physical & Chemical properties

Stability in organic solvents and identity of relevant degradation products

Administrative data

stability in organic solvents and identity of relevant degradation products
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:

Data source

Materials and methods

Results and discussion

Applicant's summary and conclusion

Study is considered scientifically unjustified. Based on the properties of the substance and experience of producing and handling the substance, it is considered the substance is stable in organic solvents.
Executive summary:

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. Nevertheless, the substance is produced and supplied in a hydrocarbon based (C/H) diluent oil, which is necessary to control viscosity during execution of the desired chemical reactions. This reality is furthermore confirmed by long term handling experience in addition to observations made during subsequent downstream formulating and blending operations where this substance is also observed to be very stabile. It should be noted that this substance is not completely soluble in some very polar low molecular weight organic solvents (egs. alcohols, esters, ketones, and ethers). However, this is not the result of substance instability, and no reactions between these solvents and the functional groups present in this substance would be expected.

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