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Environmental fate & pathways

Hydrolysis

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Description of key information

Hydrolysis: The substance was highly unstable with a half-life in the order of minutes under test conditions. Instability increased as temperature and pH increased.

Key value for chemical safety assessment

Half-life for hydrolysis:
7 min
at the temperature of:
20 °C

Additional information

Applying the Arrhenius equation, rate constant and half-life of the substance were calculated at 20 °C and pH 4, pH 7 and pH 9. The ln-transformed data of rate constants at the three temperatures of the hydrolysis test were plotted against 1/T (T= t+273.15 °C). The lines were fitted on the data and the rate constants at 20 °C were calculated from the constants and slopes (x coefficient) of regression lines.

The final results are the following:

pH value    t1/2, min

4              18

7               7

9               0.32

The substance was highly unstable with a half-life in the order of minutes under test conditions. Instability increased as temperature and pH increased.