Registration Dossier
Registration Dossier
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EC number: 210-438-6 | CAS number: 615-60-1
Endpoint summary
Administrative data
Description of key information
Additional information
Hydrolysis
Based on the hydrolytic stability of the read across substance 3-chloro-o-xylene and the Hammett structure-activity relationship regarding the electron donating effect of meta- and para-methyl groups on an aromatic ring, it was concluded that 4-chloro-o-xylene would be hydrolytically stable (half-life > 1 year at 25 °C).
Biodegradation
The results of the key study (conducted using the closed bottle test) support the conclusion that the test material does not meet the criteria as being readily biodegradable. The average biodegradation for duplicate test flasks at 28 days for the test material was 1 %. The test material therefore did not satisfy the test criteria for ready biodegradability (60 % degradability within 28 days).
Adsorption
In the key study, the test material adsorption coefficient (Koc) for soil was estimated to be 16 ± 1 at 23 °C by batch equilibrium analysis, indicating that the test material is not strongly adsorbed. This is equivalent to log Koc = 1.20 ± 0.03 at 23 °C.
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