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Environmental fate & pathways

Hydrolysis

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Description of key information

The half-lives of oleic-acid IQAC were at pH 4: > 1 year at 25 °C, at pH7 2.9 days at 20°C, 2.5 days at 25°C, 27 hours at 50 °C and 16 hours at 60 °C, respectively. At pH 9 the half life was 1.2 days at 20 °C. 

Key value for chemical safety assessment

Half-life for hydrolysis:
2.9 d
at the temperature of:
20 °C

Additional information

Hydrolysis of the test item was studied in the dark at 20 ºC, 50 ºC and 60 ºC in sterile aqueous buffered solutions at pH 4 (acetate buffer), pH 7 (phosphate buffer) and pH 9 (borate buffer) for 5 days according to EC C.7 (OECD 111). The half-lives of the test item were at pH 4: > 1 year at 25 °C, at pH 7 2.9 days at 20 °C, 2.5 days at 25 °C, 27 hours at 50 °C and 16 hours at 60 °C, respectively. At pH 9 the half life was 1.2 days at 20 °C.