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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

This substance is not readily biodegradable. But the substance is easily hydrolyzed in water and transformed into N-phenylmaleamic acid (CAS No.555-59-9).  
QSAR modelling indicates that the hydrysed product of this substance is readily biodegradable.
The transformed substance may decomposed into maleic acid (CASNo.108-31-6) and aniline (CAS No.62-53-3) depened on pH value whose substances are known to be good biodegradable.
Although itself not readily biodegradable, the substance has been shown to rapidly hydrolyse to N-phenylmaleamic acid (CAS NO.555-59-9) which its itself predictd to be readily biodegradable (EPISUITE QSAR modelling), it is indicated that this subsequent biodegradadation proceeds via breakdown into maleic acid (CAS NO.108-31-6) and aniline (CAS NO.62-53-3) which are known to be biodegradable.

Key value for chemical safety assessment

Biodegradation in water:
inherently biodegradable, not fulfilling specific criteria

Additional information

This substance is not readily biodegradabale because of the data BOD = 6% on 28 d and DOC = 11% on 28 d.

But this substance is easily hydrolyzed in water and transformed into N-phenylmaleamic acid (CAS No.555-59-9). The transformed substance may decomposed into maleic acid (CASNo.108-31-6) and aniline (CAS No.62-53-3) depened on pH value, these substances are known to be biodegradable, as measured BOD5:77%, BOD14:85% respectively.

Although itself not readily biodegradable, the substance has been shown to rapidly hydrolyse to N-phenylmaleamic acid (CAS No. 555 -59 -9) which itself predicted to be readily biodegradable (EPISUITE QSAR modelling), it is indicated that this subsequent biodegradadation proceeds via breakdown into maleic acid (CAS No. 108 -31 -6) and aniline (CAS No. 62 -53 -3) which are known to be biodegradable.