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Environmental fate & pathways

Biodegradation in water: screening tests

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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: see 'Remark'
Remarks:
The data was evaluated by experts in a report of NATIONAL INDUSTRIAL CHEMICALS NOTIFICATION AND ASSESSMENT SCHEME, which was published by Australian Commission. Also the test using OECD TGD was performed by Mitsubisi-kasei Institute of Environmental Science in Japan. Due to these the reliability of the data can be classified as reliable with restrictions.

Data source

Referenceopen allclose all

Reference Type:
review article or handbook
Title:
Unnamed
Year:
2000
Reference Type:
other company data
Title:
Unnamed
Year:
1994
Reference Type:
other: monograph provided by ECHA
Title:
Endpoint record:Biodegradation in water: screening test
Author:
ECHA
Year:
2010
Bibliographic source:
Document from ECHA

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
OECD Guideline 301 C (Ready Biodegradability: Modified MITI Test (I))
GLP compliance:
yes

Test material

Reference
Name:
Unnamed
Type:
Constituent
Type:
Constituent

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
activated sludge (adaptation not specified)
Duration of test (contact time):
>= 28 d
Reference substance
Reference substance:
aniline

Results and discussion

% Degradationopen allclose all
Parameter:
other: Biological oxygen demand (BOD) measurements
Value:
6
Sampling time:
28 d
Parameter:
other: analytical determinations
Value:
3
Sampling time:
28 d
Details on results:
Biological oxygen demand (BOD) measurements after 28 days incubation of the test substance with sewage sludge indicated a maximum of 6% degradation, while analytical determinations of the residual compound in the BOD bottles indicated a maximum of 3% degradation.

BOD5 / COD results

Results with reference substance:
The reference compound aniline, was 72% degraded over a 28-day test period.

Applicant's summary and conclusion

Validity criteria fulfilled:
not specified
Interpretation of results:
other: not readily biodegradable.
Conclusions:
The result of this test indicates that the BDP is not readily biodegradable.
Executive summary:

A test for ready biodegradability conducted according to the Modified MITI (OECD Test Guideline 301C) indicated that the chemical only very slowly degraded under the conditions of the test (Iwami S, 1994). Biological oxygen demand (BOD) measurements after 28 days incubation of the test substance with sewage sludge indicated a maximum of 6% degradation, while analytical determinations of the residual compound in the BOD bottles indicated a maximum of 3% degradation. The reference compound aniline, was 72% degraded over a 28-day test period. The result of this test indicates that the BDP is not readily biodegradable.