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:
4 (not assignable)

Data source

Reference
Reference Type:
other: extracted from ECHA database
Title:
Unnamed
Year:
1991

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
EU Method C.4-E (Determination of the "Ready" Biodegradability - Closed Bottle Test)
GLP compliance:
yes

Test material

Reference
Name:
Unnamed
Type:
Constituent

Study design

Oxygen conditions:
not specified
Inoculum or test system:
not specified
Duration of test (contact time):
28 d
Reference substance
Reference substance:
benzoic acid, sodium salt

Results and discussion

% Degradationopen allclose all
Parameter:
not specified
Value:
43
Sampling time:
28 d
Parameter:
not specified
Value:
13
Sampling time:
15 d
Parameter:
not specified
Value:
12
Sampling time:
5 d

BOD5 / COD results

Results with reference substance:
96% after 5 d
99% after 15 d
100 % after 28 d

Applicant's summary and conclusion

Interpretation of results:
not inherently biodegradable
Conclusions:
As 43% biodegradation was observed at 28 days, the substance is not considered to be readily biodegradable and it cannot be considered as unduly toxic to activated sludge micro-organism.