Registration Dossier

Environmental fate & pathways

Biodegradation in water: screening tests

Currently viewing:

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
Cross-reference
Reason / purpose:
read-across: supporting information

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2002
Report Date:
2002

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
OECD Guideline 301 C (Ready Biodegradability: Modified MITI Test (I))
Version / remarks:
July 17, 1992
GLP compliance:
yes (incl. certificate)

Test material

Reference
Name:
Unnamed
Type:
Constituent

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
activated sludge, adapted
Duration of test (contact time):
28 d
Initial test substance concentration
Initial conc.:
ca. 100 mg/L
Based on:
test mat.
Parameter followed for biodegradation estimation
Parameter followed for biodegradation estimation:
O2 consumption
Details on study design:
Measurement and analysis
(1) Measurement of biochemical oxygen Demand (BOD) by a closed-system oxygen consumption measurement system
(2) Analysis of test substance by Gaschromatography (GC)

Results and discussion

% Degradation
Key result
Parameter:
% degradation (O2 consumption)
Remarks:
according BOD resp. GC
Value:
ca. 93 - ca. 94
Sampling time:
28 d

BOD5 / COD results

BOD5 / COD
Key result
Parameter:
BOD5
Value:
>= 105 - <= 121 mg O2/g test mat.

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Interpretation of results:
readily biodegradable
Conclusions:
Test item (2-methylpentane) is readily biodegradable within 28d.