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: see 'Remark'
Remarks:
The data comes from 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

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1994

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
OECD Guideline 301 C (Ready Biodegradability: Modified MITI Test (I))
GLP compliance:
not specified

Test material

Reference
Name:
Unnamed
Type:
Constituent

Study design

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

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.