Registration Dossier
Registration Dossier
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EC number: 201-983-0 | CAS number: 90-30-2
Endpoint summary
Administrative data
Description of key information
Additional information
Several studies investigating the biodegradation of N-phenyl-1-naphthylamine are available. Two studies tested the ready biodegradability of the substance according to OECD guideline 301C. As a result, 0% degradation was observed in both studies after 14 and 28 days, respectively. Hence the test substance is not considered to be readily biodegradable according to OECD criteria.
However, a third study following recommendations of the US-EPA and measuring CO2 evolution, yielded 50% degradation of N-phenyl-1-naphtylamine within 5 days in sewage effluent and >75% and 100% degradation within 2 and 10 d, respectively, in supplemented sewage sludge (Sikka et al. 1981). For lake water, 50% degradation after 5 d and > 90% degradation after 18 d were observed. This study indicates that the substance is inherently biodegradable in water under environmental conditions. This abbility to be degraded and mineralized could also be shown in soil, where around 35% of the substance were mineralized after 11 days.
Together, as the reported half-life value is below the persistence criteria of 40 d (water) set in Annex XIII of REACH regulation (EC) No 1907/2006, the substance is considered to be biodegradable under environmental conditions and thus not persistent in the environment.
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