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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
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2017
Report date:
2017

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
OECD Guideline 301 F (Ready Biodegradability: Manometric Respirometry Test)
Qualifier:
according to guideline
Guideline:
EU Method C.4-D (Determination of the "Ready" Biodegradability - Manometric Respirometry Test)
GLP compliance:
yes (incl. QA statement)

Test material

Constituent 1
Chemical structure
Reference substance name:
2-propylvaleronitrile
EC Number:
236-338-2
EC Name:
2-propylvaleronitrile
Cas Number:
13310-75-3
Molecular formula:
C8H15N
IUPAC Name:
2-propylpentanenitrile

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
activated sludge, domestic (adaptation not specified)
Duration of test (contact time):
<= 28 d
Initial test substance concentration
Initial conc.:
<= 101.6 mg/L
Based on:
test mat.
Parameter followed for biodegradation estimation
Parameter followed for biodegradation estimation:
O2 consumption
Details on study design:
Test conditions: climatised chamber, 22°C +/- 1°C, darkness, pH of 7.5 (start of test) to 8.2 (end of test)
Reference substance
Reference substance:
benzoic acid, sodium salt

Results and discussion

% Degradation
Key result
Parameter:
% degradation (O2 consumption)
Value:
<= 0
Sampling time:
28 d
Details on results:
The degradation rate of 2-propylvaleronitrile was 0% after 28 days (ThOD(NH4), ThOD(NO3)). Therefore, the substance is considered to be not readily biodegradable.

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Interpretation of results:
not readily biodegradable
Conclusions:
Based on the experimental results, 2-propylvaleronitrile is considered to be not readily biodegradable.

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