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Environmental fate & pathways

Biodegradation in water: screening tests

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Reference
Endpoint:
biodegradation in water: ready biodegradability
Type of information:
experimental study
Adequacy of study:
key study
Study period:
1990
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method C.4-E (Determination of the "Ready" Biodegradability - Closed Bottle Test)
Version / remarks:
Cited as Directive 84/449/EEC, C.6
GLP compliance:
yes
Oxygen conditions:
aerobic
Inoculum or test system:
sewage, domestic, non-adapted
Duration of test (contact time):
28 d
Initial conc.:
2 mg/L
Based on:
test mat.
Reference substance:
other:
Key result
Parameter:
other: BOD/COD %
Value:
ca. 4
Sampling time:
28 d
Details on results:
Kinetic of control substance (in %):
> 60 after 5 day(s)
Degradation products: no
Validity criteria fulfilled:
yes
Interpretation of results:
not readily biodegradable
Conclusions:
The test can be considered valid. The results indicate that Piperonyl Butoxide is not readily biodegradable under aerobic conditions according to the criteria defined by OECD guideline 301 D

Description of key information

Piperonyl  Butoxide is not readily biodegradable under aerobic conditions according  to the criteria defined by OECD guideline 301 D.

Key value for chemical safety assessment

Biodegradation in water:
under test conditions no biodegradation observed

Additional information

Both the biodegradability tests performed show that the substance is not readily biodegradable.