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Environmental fate & pathways

Hydrolysis

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Description of key information

DMBPC is not amenable to abiotic degradation via hydrolysis (i.e., is stable in water).

Key value for chemical safety assessment

Additional information

The potential of the test material to undergo hydrolysis was investigated in accordance with the standardised guideline OECD 111 under GLP conditions. The study was awarded a reliability score of 1 in accordance with the criteria set forth by Klimisch et al. (1997).

The analytical method for determination of trace amounts of DMBPC in water was an HPLC gradient method which used a standard C18 reverse phase column, a water/acetonitrile gradient, and UV detection at 230 nm.

The hydrolysis in water was evaluated in a five day study at pH 4, 7 and 9 at 50 °C. The initial concentration of DMBPC was 345 µg/L. There was no loss of the test substance after 5 d. Therefore, no value could be determined for half-life.

DMBPC as a saturated solution in aqueous buffers at pH 4.0, 7.0 and 9.0 was found to be hydrolytically stable after 5.0 d at 50 °C. At pH 4, 7 and 9, the percent recovery values were 104.1, 103.5 and 100.2, respectively. Therefore, DMBPC is not amenable to abiotic degradation via hydrolysis (i.e., is stable in water).