Registration Dossier

Environmental fate & pathways

Biodegradation in water: screening tests

Administrative data

Endpoint:
biodegradation in water: ready biodegradability
Type of information:
experimental study
Adequacy of study:
other information
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1993

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
EU Method C.4-D (Determination of the "Ready" Biodegradability - Manometric Respirometry Test)
Version / remarks:
July 1990
GLP compliance:
yes

Test material

Constituent 1
Chemical structure
Reference substance name:
2-methylcyclohexanol, mixed isomers
EC Number:
209-512-0
EC Name:
2-methylcyclohexanol, mixed isomers
Cas Number:
583-59-5
Molecular formula:
C7H14O
IUPAC Name:
Reaction mass of trans-2-methylcyclohexanol and cis-2-methylcyclohexanol

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:
test mat.
Parameter followed for biodegradation estimation
Parameter followed for biodegradation estimation:
O2 consumption

Results and discussion

% Degradationopen allclose all
Parameter:
% degradation (O2 consumption)
Value:
9
Sampling time:
8 d
Parameter:
% degradation (O2 consumption)
Value:
26
Sampling time:
18 d
Parameter:
% degradation (O2 consumption)
Value:
36
Sampling time:
20 d
Parameter:
% degradation (O2 consumption)
Value:
66
Sampling time:
26 d
Parameter:
% degradation (O2 consumption)
Value:
74
Sampling time:
28 d

Applicant's summary and conclusion

Interpretation of results:
readily biodegradable