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Physical & Chemical properties

Water solubility

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Description of key information

The determination was carried out by the flask method, using a procedure designed to be compatible with Method A.6 Water Solubility of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 105 of the OECD Guidelines for Testing of Chemicals, 27 July 1995.

The water solubility of the test item has been determined to be 2.46 x 10-2 g/L of solution at 20.0 ± 0.5 °C.

Key value for chemical safety assessment

Water solubility:
0.025 g/L
at the temperature of:
20 °C

Additional information

On completion of the equilibration period, the samples were clear and colorless with excess test item present at the bottom of the test vessels. The solutions were decanted, avoiding excess test item prior to centrifugation. After centrifugation, the supernatant was taken for analysis. The supernatant was visually observed to be clear/colorless and free from undissolved test item.

During method development it was indicated that the test item underwent hydrolysis. Of the two isomers, the later eluting isomer hydrolysed very rapidly, while the first isomer also hydrolysed but more slowly. Therefore, for the analysis, the results were calculated on the basis of the first isomer to represent the test item.

Due to the hydrolysis, shorter shaking periods were used in addition to the standard shaking times of 24, 48 and 72 hours. It was evident from the results that longer shaking periods (24 to 72 hours) reduced the analyzed result. The observed solubility increased across the samples shaken for shorter duration. Therefore the water solubility has been quoted as the concentration of the sample with the highest result (shaken for 3 hours).