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Registration Dossier
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EC number: 946-212-5 | CAS number: -
Hydrolysis
Administrative data
Link to relevant study record(s)
Description of key information
Hydrolysis_OECD 111/EU Method C.7_ Half life > 1 year for pH 4, 7, 9 at 25°C
Key value for chemical safety assessment
- Half-life for hydrolysis:
- 1 yr
- at the temperature of:
- 25 °C
Additional information
The hydrolysis of the Benzenesulfonic acid, mono-C20-24 (even)-sec-alkyl derivs., para-, sodium salts (generic name: C20-24 sodium sulfonate) has been determined according to a procedure compatible with OECD Guideline 111 and EU Method C.7 in compliance with GLP (Fox, 2015a). Based on the Critical Micelle Concentration of the substance (10 mg/L; please refer to Fox, 2015c), a test concentration of 2 mg/L was chosen (less than half the approximate water solubility of the test item). This was also significantly below 0.01M.
The hydrolysis of the substance was investigated for pH 4, 7 and 9 at 50 °C for a total test duration of 145.75 h. HPLC-MS has been used as analytical method. Test concentrations were determined after 0, 24, 120 and 145.75 h based on absolute standard concentrations. Overall the results demonstrated that the test item was hydrolytically stable for greater than a year at 25 °C at pH 4, pH 7 and pH 9. Less than 10 % hydrolysis occurred after 5 days at the indicated pH values, respectively.
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