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Environmental fate & pathways

Biodegradation in water and sediment: simulation tests

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Description of key information

This substance is not readily biodegradable, but this substance did not remain. The remaining product is estimated as the hydrolysis product. 
1st study: BOD 6% at 28 day.
2nd study(OECD TG 301C,GLP): BOD = 19%, TOC = 32%, HPLC = 100% at 28 day
3rd study (OECD TG 302C, GLP); BOD = 0%, TOC = 21%, HPLC = 100% at 28 day
The hydfrolysis product is 4-oxo-4-(phenylamino)isocrotonic acid (cas no: 555-59-9).
This hydrolysis product is estimated to be further hydrolysed in activated sludge into maleic acid and aniline depened by pH value which products are readily biodegradable.

Key value for chemical safety assessment

Half-life in freshwater:
3.01 h
at the temperature of:
25 °C
Half-life in freshwater sediment:
3 240 h

Additional information

This substance is not readily biodegradable, but this substance did not remain. The remaining product is estimated as the hydrolysis product.

1st study: BOD 6% at 28 day.

2nd study (OECD TG 301C,GLP): BOD = 19%, TOC = 32%, HPLC = 100% at 28 day

3rd study (OECD TG 302C, GLP); BOD = 0%, TOC = 21%, HPLC = 100% at 28 day

The hydrolysis product is 4-oxo-4-(phenylamino)isocrotonic acid (cas no: 555-59-9).

This hydrolysis product is estimated to be further hydrolysed in activated sludge into maleic acid and aniline depened by pH value which products are readily biodegradable.