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Environmental fate & pathways

Biodegradation in water and sediment: simulation tests

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Description of key information

3-acetamido-5-amino-4-hydroxybenzenesulphonic acid is 50% biodegradable in water in 38 days (half-life) indicating that it is not persistent (readily biodegradable) in water while in sediment in it is 50% biodegradable in 340 days(8160 hrs) (half-life) indicating that it is persistent(not readily biodegradable) in sediment.

Key value for chemical safety assessment

Half-life in freshwater:
912 h
at the temperature of:
25 °C
Half-life in freshwater sediment:
8 160 h
at the temperature of:
25 °C

Additional information

Based on level III fugacity model the half life period of 3-acetamido-5-amino-4-hydroxybenzenesulphonic acid was estimated. Half life period of 3-acetamido-5-amino-4-hydroxybenzenesulphonic acid in water was observed to be 38 days while in sediment it is 340 days. From these half life values it is concluded that 3-acetamido-5-amino-4-hydroxybenzenesulphonic acid is readily biodegradable (non persistent) in water where as it is non biodegradable (persistent) in sediment.

However it has been observed that 3-acetamido-5-amino-4-hydroxybenzenesulphonic acid does not diffuse in the sediment medium since its percentage in the sediment medium is reported to be 0% and hence persistence in the sediment medium is not likely to be critical

Media

Half-Life 
(days)

Percent in
Each Medium

Water

38

  35%

Sediment

340

  0%