Registration Dossier
Registration Dossier
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EC number: 210-765-4 | CAS number: 623-03-0
Endpoint summary
Administrative data
Description of key information
4-chlorobenzonitrile was incubated with primary effluent of raw municipal sewage acclimated to non-chlorinated compounds at an initial concentration of 2mmol/L at 29 °C. The degradation of the test substance was followed by photometric measurements of anorganic chlorine that was released in connection with the decomposition of 4-chlorobenzonitrile.
2.1 - 4.2 % organic chlorine were released as inorganic chlorine after 2 days by sewage sludge acclimated to various nonchlorinated compounds.
Due to the short incubation duration an interpretation of these results is difficult. It is not possible to differentiate whether the substance is not readily biodegradable or if biodegradation might start after a certain lag phase.
Besides, the degradation of 4-chlorobenzonitrile was investigated in anaerobic sediment systems under laboratory conditions. The degradation half-life of 4-chlorobenzonitrile under the conditions of the test was determined to be approximately 19 d.
Additional information
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