Registration Dossier

Environmental fate & pathways

Biodegradation in water: screening tests

Administrative data

Endpoint:
biodegradation in water: inherent biodegradability
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Basic data given.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1986
Report Date:
1986

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
OECD Guideline 302 B (Inherent biodegradability: Zahn-Wellens/EMPA Test)
GLP compliance:
no

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
- Name of test material (as cited in study report): Dichlororthanilsaeure

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
activated sludge, industrial (adaptation not specified)
Details on inoculum:
- Source of inoculum/activated sludge (e.g. location, sampling depth, contamination history, procedure): activated sludge taken from the waste water treatment plant of BASF- Concentration of sludge: 5 g/l
Duration of test (contact time):
28 d
Initial test substance concentration
Initial conc.:
400 mg/L
Based on:
DOC
Parameter followed for biodegradation estimation
Parameter followed for biodegradation estimation:
DOC removal
Reference substance
Reference substance:
other: no

Results and discussion

% Degradation
Parameter:
% degradation (DOC removal)
Value:
< 20
Sampling time:
28 d
Details on results:
Kinetic of test substance (in %): = 5 after 3 hour(s)< 0 after 7 day(s)= 3 after 21 day(s)= 0 after 28 day(s)

Applicant's summary and conclusion

Interpretation of results:
other: DOC-elimination, poorly eliminable from water