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
Study period:
2012
Reliability:
1 (reliable without restriction)

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2012
Report Date:
2012

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
Test material form:
liquid
Details on test material:
Test substance name: MI RAMER M1086
Appearance : Clear liquid
Manufacturing date: 2012-03-29
Supplier:Miwon Specialty Chemical Co., Ltd.
Receipt day: 2012-05-23
Deli very amount: 399.223 g(Gross)
Cas No.:117646-83-0
Lot No.:120329JY1
Purit y: 95.55 %
Expiration date: 2013-03-28 (Manufactured after 1 year)
Storage condition: Room temperature [(15 ~ 25)°C

Study design

Inoculum or test system:
activated sludge, domestic (adaptation not specified)
Details on inoculum:
Inoculum used in the biodegradation test was collected from 15 sites in Korea including 7 rivers, 5 domestic sewage treatmeant plants and 3 industrial wastewater treatment plants. Fresh samples collected from these sites were incubated for one month and used in biodegration test.
Duration of test (contact time):
28 d
Initial test substance concentration
Initial conc.:
100 other: 100 ppm (w/v)
Parameter followed for biodegradation estimationopen allclose all
Parameter followed for biodegradation estimation:
O2 consumption
Parameter followed for biodegradation estimation:
test mat. analysis
Reference substance
Reference substance:
aniline

Results and discussion

% Degradationopen allclose all
Key result
Parameter:
% degradation (O2 consumption)
Value:
10.2
Sampling time:
7 d
Key result
Parameter:
% degradation (O2 consumption)
Value:
18.7
Sampling time:
14 d
Key result
Parameter:
% degradation (O2 consumption)
Value:
36.5
Sampling time:
28 d

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Interpretation of results:
not readily biodegradable
Conclusions:
Microbial degradation of MIRAMER M1086 was performed for 28 day following the OECD TG 301C.
The percentage biodegradtions of MIRAMER M1086 observed by BOD meter was 36.5% after 28 days. Therefore the test substance could not be concluded to be readily degradable by microorganisms in the aquatic environment.
Executive summary:

Microbial degradation of MIRAMER M1086 was performed for 28 day following the OECD TG 301C.

The percentage biodegradtions of MIRAMER M1086 observed by BOD meter was 36.5% after 28 days. Therefore the test substance could not be concluded to be readily degradable by microorganisms in the aquatic environment.