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Environmental fate & pathways

Biodegradation in water: screening tests

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Administrative data

Endpoint:
biodegradation in water: inherent biodegradability
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2012

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 302 B (Inherent biodegradability: Zahn-Wellens/EMPA Test)
GLP compliance:
yes (incl. QA statement)

Test material

Constituent 1
Chemical structure
Reference substance name:
Piperazine-1,4-diethanol
EC Number:
204-586-0
EC Name:
Piperazine-1,4-diethanol
Cas Number:
122-96-3
Molecular formula:
C8H18N2O2
IUPAC Name:
1,4-Bis(2-hydroxyethyl)piperazine

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.:
100 mg/L
Based on:
other: Carbon
Reference substance
Reference substance:
diethylene glycol

Results and discussion

% Degradation
Key result
Parameter:
% degradation (DOC removal)
Value:
5
Sampling time:
28 d

BOD5 / COD results

Results with reference substance:
100% after 14 d

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Interpretation of results:
not inherently biodegradable

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