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Environmental fate & pathways

Biodegradation in water: screening tests

Administrative data

Endpoint:
biodegradation in water: ready biodegradability
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Feb 2015
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Study done to guideline, in compliance with GLP

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2015
Report date:
2015

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 301 F (Ready Biodegradability: Manometric Respirometry Test)
Deviations:
no
GLP compliance:
yes (incl. QA statement)

Test material

Constituent 1
Chemical structure
Reference substance name:
2,6,6-trimethylcyclohex-1-enecarbonitrile
EC Number:
921-141-2
Cas Number:
57524-14-8
Molecular formula:
C10H15N
IUPAC Name:
2,6,6-trimethylcyclohex-1-enecarbonitrile
Test material form:
gas under pressure: refrigerated liquefied gas

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
activated sludge, domestic, non-adapted
Duration of test (contact time):
48 d
Initial test substance concentration
Initial conc.:
30 mg/L
Based on:
test mat.

Results and discussion

% Degradation
Parameter:
% degradation (O2 consumption)
Value:
0
Sampling time:
48 d

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Interpretation of results:
under test conditions no biodegradation observed
Executive summary:

Cyclogeranitrile Beta undergoes no biodegradation after 28 days (no biodegradation after 48 days) in the test conditions.

Cyclogeranitrile Beta did not significantly inhibit the intrinsic respiration of the inoculum at the test concentratrion and was therefore considered to be non-toxic to the inoculum at the test concentration.

Thus, Cyclogeranitrile Beta should be regarded as not readily biodegradable according to this study.

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