Registration Dossier
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EC number: 430-500-8 | CAS number: 204277-61-2
Hydrolysis
Administrative data
Link to relevant study record(s)
Description of key information
Abiotic degradation (hydrolysis) of FAT 41024/B.
Key value for chemical safety assessment
Additional information
Under Study 847281 RCC was supposed to perform the testing of the abiotic degradation (hydrolysis) of FAT 41024/B. Due to experimental difficulties and to the special properties of the test item, it was decided not to perform the experimental hydrolysis test.
The determination of hydrolysis behaviour is based upon the possibility of preparing an aqueous solution of the test item with a concentration above the limit of detection. In RCC study 722316 the solubility of FAT 41024/B in water has been found to be below 0.051 mg/l, which was the limit of quantification during that study. Based on the molecular structure of FAT 41024/B it is highly unlikely that any ionic species (of a higher solubility than the nonionic molecule) would occur at pH 4 or 9.
It is outlined in the EC guideline C.7 as well as in the OECD Guideline 111, that the hydrolysis test is only applicable to water soluble substances and that it is necessary to have a suitable analytical method to monitor the degradation of the test compound. Therefore it was decided not to perform the hydrolysis test with FAT 41024/B.
In accordance with REACH Annex VIII column 2, the study does not need to be conducted if the substance is readily biodegradable or highly insoluble in water.
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