Registration Dossier
Registration Dossier
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EC number: 204-337-6 | CAS number: 119-61-9
Endpoint summary
Administrative data
Description of key information
Additional information
In a study conducted according to OECD Guideline 301F, benzophenone proved to be readily biodegradable according to OECD criteria (66 -84% degradation after 28 days). The enrichment culture of the microbial strain MU-1 (black yeast Rhinocladiella aquaspersa) isolated from activated sludge was able to degraded benzophenone: Low benzophenone concentrations were degraded by more than 95% within several days (degradation: 100 mg/L within 3 d; 1000 mg/L within 7 d). Based on GC/MS analysis, benzophenone was degraded into hydrophilic compounds with very low molecular mass via conversion to phenol. Furthermore, low concentrations of benzophenone were found to be biodegraded by microbes occurring in unpolluted natural water samples. The rates of microbial degradation, however, were different due to the different composition and amounts of microbes (East Lake water: ca. 50% degradation after 12 d; Changjiang River water: ca. 25% degradation after 12 d).
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