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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

In a 28-day biodegradability study, microorganism in activated sludge were exposed to tetra-n-propylammonium bromide (TPAB) at nominal concentrations of 0 (Blank control and positive control), 10 and 20 mg/L (nominal concentrations).
The criterion for ready biodegradability (at least 60% biodegradation within a 10-day window) was not met since only 6 and 5 % of the test substance was biodegraded at test day 29. Therefore, tetra-n-propylammonium bromide (TPAB) is classified as not readily biodegradable. The present toxicity study is classified as reliable without restrictions since it satisfies all the requirements of OECD Guideline No. 301 B.

Key value for chemical safety assessment

Biodegradation in water:
under test conditions no biodegradation observed

Additional information