Registration Dossier
Registration Dossier
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EC number: 700-618-7 | CAS number: 39202-17-0
Hydrolysis
Administrative data
Link to relevant study record(s)
Description of key information
The hydrolysis as a function of pH of the test item9-dodecenoic acid, methyl ester has been read-across from the substance 9-decenoic acid, methyl ester. The half-life of 9-decenoic acid, methyl ester at 25 ºC was determined to be > 1 year at pH 4 and pH 7. The rate constant at 25 ºC and pH 9 was determined to be 1.24 x 10-5 s-1 and the half-life at 25 ºC and pH 9 was determined to be 15.5 hours.
Key value for chemical safety assessment
Additional information
The hydrolysis as a function of pH of the test item 9-dodecenoic acid, methyl ester (9DDAME) has been read-across from the substance 9-decenoic acid, methyl ester (9DAME) from the following study.
Method
The determination was carried out using a procedure designed to be compatible with Method C7 Abiotic Degradation, Hydrolysis as a Function of pH of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 111 of OECD Guidelines for Testing of Chemicals, 13 April 2004.
Conclusion
The rate constant and estimated half-life at 25 °C of the test item are shown in the following table:
pH |
Rate constant (s-1) |
Estimated half-life at 25 °C |
4 |
- |
> 1 year |
7 |
- |
> 1 year |
9 |
1.24 x 10-5 |
15.5 hours |
Read-across justification: A comparison of target substance (9DDAME) and the read-across substance (9DAME) shows that the two substances share structural similarities, increasing from a chain length of C10 to C12 with similar functional groups and also have ‘mechanistic action’ similarities.
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