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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:
2019.03.12~2019.05.17
Reliability:
1 (reliable without restriction)

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2019
Report date:
2019

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 301 C (Ready Biodegradability: Modified MITI Test (I))
Version / remarks:
Adopted : 1992-07-17
GLP compliance:
yes

Test material

Constituent 1
Chemical structure
Reference substance name:
Trimethyloctylammonium methyl sulphate
EC Number:
265-332-2
EC Name:
Trimethyloctylammonium methyl sulphate
Cas Number:
65059-42-9
Molecular formula:
C11H26N.CH3O4S
IUPAC Name:
trimethyl(octyl)azanium methyl sulfate
Test material form:
solid: bulk

Study design

Inoculum or test system:
sewage, domestic, adapted
Details on inoculum:
Cultured inoculum (more than 1 month), cell number 107 cells/mL or more
Duration of test (contact time):
ca. 28 d

Results and discussion

% Degradationopen allclose all
Parameter:
% degradation (O2 consumption)
Value:
ca. 83
Sampling time:
7 d
Parameter:
% degradation (O2 consumption)
Value:
ca. 76.1
Sampling time:
14 d
Parameter:
% degradation (O2 consumption)
Value:
ca. 84.5
Sampling time:
28 d

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Interpretation of results:
readily biodegradable
Conclusions:
The test could be concluded to be readily degradable by microorganism in the aquatic environment based on the OECD pass level of biodegradability (60 %).

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