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Environmental fate & pathways

Hydrolysis

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Description of key information

Hydrolysis as a function of pH was assessed according to OECD 111 at 50 ºC, 27 ºC and 40 ºC. At 27ºC, the half life times are around 100 to 140 hours. The decay rates are not strongly dependent on pH value and are approximately doubled by the temperature increase from 27 ºC to 40 ºC.  The substance is not expected to persist in the environment.

Key value for chemical safety assessment

Half-life for hydrolysis:
140 h
at the temperature of:
27 °C

Additional information

Hydrolysis as a function of pH was assessed according to OECD 111 (EC C.7) and in compliance with GLP (IBR Forschungs GmbH for RWE-DEA Ag.). The substance was subjected to a preliminary test of hydrolytic degradation at 50ºC, which was followed by a more detailed examination at 27ºC and 40ºC. In each case pH values of 4.0, 7.0 and 9.0 were employed. Concentration half life times were calculated from the hydrolysis reaction rate constants. At 27ºC, the half life times were 103 hours, 135 hours and 140 hours at pH 4.0, 7.0 and 9.0, respectively, and at 40ºC, the half life times were 69.9 hours, 54.1 hours and 57.3 hours at pH 4.0, 7.0 and 9.0, respectively.