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Environmental fate & pathways

Hydrolysis

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Description of key information

The results of pH 7.0 and pH 9.0 showed no significant degradation of the substance at 50 °C. Even at pH 4.0 and 50 °C, the degradation of the substance was less than 10 % after 5 days. Therefore, the substance was considered to be hydrolytically stable.

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Additional information

The hydrolysis determination of the substance at different pH values was based on the OECD Guideline No. 111, "Hydrolysis as a Function of pH"; adopted May 12, 1981 and on the EEC Directive 92/69, Section C.7, "Abiotic Degradation: Hydrolysis as a Function of pH", L383 A, December 1992. As recommended in the guidelines, a preliminary test (Tier 1) was conducted at a temperature of 50 °C and pH 4.0, 7.0, and 9.0.

The results of pH 7.0 and pH 9.0 showed no significant degradation of the substance at 50 °C. Even at pH 4.0 and 50 °C, the degradation of the substance was less than 10 % after 5 days. According to the EEC Directive 92/69, Section C.7, it can be concluded that the estimated half-life time is higher than one year under representative environmental conditions (25°C). Therefore, the substance was considered to be hydrolytically stable, and no further testing was necessary.