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Environmental fate & pathways

Hydrolysis

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Description of key information

Abiotic Degradation - Hydrolysis as a Function of pH: Assessment of hydrolytic stability was not carried out using Method C7 of Commission Directive 92/69/EEC due to low solubility in aqueous media.  

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Additional information

Testing was not carried out according to Method C7 of Commission Directive 92/69/EEC for the following reasons:

·         The test material was essentially insoluble in water, having a solubility of =8.18 x 10-6g/l as determined by the water solubility study. The hydrolysis study would need to be carried out at no more than half this level.

·         The test material has multiple components. Materials of this nature are generally not suited to testing under Method C7 as monitoring of individual components may prove difficult.

·         Even though the analysis of the test material by Gas chromatography (GC) was a sensitive method, it would not provide adequate sensitivity at the concentration required to detect down to 10% of test material remaining.

·         The method of analysis involved recovery/extraction of the test material out of aqueous media. Although this is not reason for not conducting the hydrolysis test itself, the recovery method contained interfering peaks which would interfere with any test material peaks at the concentrations required. Solid phase extraction (SPE) provided poor recoveries.

The test material is a long chain alkene and contains no functional groups that would be expected to hydrolyse, therefore it can be considered to be stable under environmentally relevant conditions.