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:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: According to OECD Guideline No. 301 F

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1989
Report date:
1989

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 301 F (Ready Biodegradability: Manometric Respirometry Test)
GLP compliance:
not specified

Test material

Constituent 1
Chemical structure
Reference substance name:
Sodium N-(2,3-dihydro-2-oxo-1H-benzimidazol-5-yl)-3-hydroxynaphthalene-2-carboxamidate
EC Number:
278-575-4
EC Name:
Sodium N-(2,3-dihydro-2-oxo-1H-benzimidazol-5-yl)-3-hydroxynaphthalene-2-carboxamidate
Cas Number:
76918-62-2
Molecular formula:
C18H13N3O3.Na

Study design

Inoculum or test system:
sewage, domestic, non-adapted
Details on inoculum:
- Origin: Municipal sewage treatment plant of Sindlingen (Frankfurt)
- non-adapted sewage, receives predominatly municipal sewage and hardly industrial chemical waste
Duration of test (contact time):
28 d
Initial test substance concentration
Initial conc.:
>= 207 - <= 218 mg/L
Based on:
test mat.
Parameter followed for biodegradation estimation
Parameter followed for biodegradation estimation:
DOC removal

Results and discussion

% Degradationopen allclose all
Parameter:
% degradation (DOC removal)
Value:
0
Sampling time:
7 d
Parameter:
% degradation (DOC removal)
Value:
0
Sampling time:
14 d
Parameter:
% degradation (DOC removal)
Value:
0
Sampling time:
21 d
Parameter:
% degradation (DOC removal)
Value:
0
Sampling time:
28 d

Applicant's summary and conclusion

Interpretation of results:
under test conditions no biodegradation observed
Conclusions:
Not readily biodegradable