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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:
2016-03-19 till 2016-04-15
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study
Remarks:
without GLP
Qualifier:
according to guideline
Guideline:
OECD Guideline 301 F (Ready Biodegradability: Manometric Respirometry Test)
Version / remarks:
adopted July 17, 1992
GLP compliance:
no
Remarks:
The substance is known to be not readily biodegradable. Therefore a non-GLP study was adequate to prove the poor biodegradability.
Oxygen conditions:
aerobic
Inoculum or test system:
activated sludge, domestic, non-adapted
Duration of test (contact time):
28 d
Initial conc.:
41 mg/L
Based on:
test mat.
Preliminary study:
Result of the preliminary study:
The biodegradation of the test item (2 replicates) does not reach the 10 % level (beginning of biodegradation) until test end. The mean biodegradation on day 28 was 6 %.
Key result
Parameter:
other: BOD
Value:
ca. 6
Sampling time:
28 d
Remarks on result:
other: not readily biodegradable
Details on results:
not readily biodegradable
Results with reference substance:
no reference substance used for limit test
Validity criteria fulfilled:
yes
Interpretation of results:
not readily biodegradable
Conclusions:
The test item is classified as not readily biodegradable within 28 days.

Description of key information

not readily biodegradable

Key value for chemical safety assessment

Biodegradation in water:
under test conditions no biodegradation observed
Type of water:
freshwater

Additional information