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Environmental fate & pathways


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Description of key information

In contact with water at neutral pH no hydrolysis of hydroxypropyl acrylate will be observed. In alkaline water, the substance will hydrolyse rapidly.

Key value for chemical safety assessment

Additional information

The hydrolysis rate of hydroxypropyl acrylate is pH dependent with little hydrolysis at acid and neutral pH and rapid hydrolysis under alkaline conditions. The hydrolysis half-lives determined at pH 3, 7, and 11 were > 490 days, >230 days, and 0.056 days, respectively (Dow Chemical Company, 1997). Based on the hydrolysis rate constant determined for HPA, half-lives of 35 to 40 days would be expected at pH 8.

Hydrolysis is not the predominant degradation process since the test substance is readily biodegradable. Therefore, hydrolysis will not contribute significantly to the degradation of HPA under environmental conditions.