Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Abiotic degradation

No test data on abiotic degradation is available. It is not possible to experimentally evaluate the hydrolysis potential of the substance from the compositional description and the structural formula given, it can be concluded that this substance 272-238-5 (EINECS) may be susceptible to hydrolysis in the presence of extremely acidic or extremely basic aqueous media. The dithiophosphate moiety is the functional group that would be attacked under such extreme conditions. However, at environmentally relevant pHs, hydrolysis is estimated to be very minimal largely because the water solubility of this zinc dithiophsphate is severely limited and the diluents oil present, which is necessary to control viscosity during execution of the desired chemical reactions, will have a retarding effect upon the rate of the hydrolysis reaction in general.

No experimental data are available on half lives in water, sediment, soil or photochemical degradation in the atmosphere. No information on Phototransformation of the substance is available. It should be noted that this substance is not expected to be significantly found in air due to its low vapour pressure.

Biotic degradation

The substance was not readily biodegradable under the conditions of the experimental studies. No experimental testing was possible using Method C7, Abiotic Degradation, Hydrolysis as a Function of pH because Method C7 is not suitable for complex mixtures because: a) monitoring of individual components and degradation products would be extremely difficult; and b) the material has been determined to be poorly soluble in water, and hydrolysis testing would be required at half the saturation concentration value of the component with the lowest water solubility. The NMR profile shows material complexity that makes hydrolysis experiments using standard methods technically not feasible. Data for degradation due to photolysis in soils and sediments are not available.