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The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Administrative data

Endpoint:
activated sludge respiration inhibition testing
Type of information:
experimental study
Adequacy of study:
key study
Study period:
March - August 2001
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Study performed according to international guidelines and GLPs using the commercial product as test article.

Data source

Referenceopen allclose all

Reference Type:
study report
Title:
Unnamed
Year:
2001
Reference Type:
publication
Title:
Unnamed
Year:
2002

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
OECD Guideline 209 (Activated Sludge, Respiration Inhibition Test
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method C.11 (Biodegradation: Activated Sludge Respiration Inhibition Test)
Deviations:
no
GLP compliance:
yes

Test material

Constituent 1
Chemical structure
Reference substance name:
Bis(pentabromophenyl) ether
EC Number:
214-604-9
EC Name:
Bis(pentabromophenyl) ether
Cas Number:
1163-19-5
Molecular formula:
C12Br10O
IUPAC Name:
bis(pentabromophenyl) ether
Details on test material:
Test material was a composite of equal porportions of the commercial DecaBDE products of Albemarle Corp, Dead Sea Bromine Group, and Chemtura Corp.

Sampling and analysis

Analytical monitoring:
no

Test solutions

Vehicle:
no

Test organisms

Test organisms (species):
activated sludge of a predominantly domestic sewage

Study design

Test type:
static
Water media type:
freshwater
Limit test:
yes
Total exposure duration:
3 h

Test conditions

Test temperature:
20 +-2 degrees C

Results and discussion

Effect concentrations
Duration:
3 h
Dose descriptor:
EC50
Effect conc.:
> 15 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
inhibition of total respiration
Remarks:
respiration rate

Any other information on results incl. tables

Treatment

Concentration (mg/L)

Respiration Rate (mg O2/L/hr)

Percent

Inhibition

Control 1

NA

41.6

NA

Control 2

NA

41.6

NA

3,5-dichlorophenol

3

39.0

6.3

3,5-dichlorophenol

15

12.8

69.2

3,5-dichlorophenol

50

4.9

88.2

DecaBDE

15

40.0

3.9

DecaBDE

15

43.4

-4.3

DecaBDE

15

40.0

3.9

NA: Not applicable.

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Remarks:
Difference in respiration between the 2 controls < 15% differece established for the test.
Conclusions:
DecaBDE did not inhibit the respiration of activiated sewage sludge.
Executive summary:

DecaBDE did not inhibit the respiration of activiated sewage sludge when tested at a concentration of 15 mg/L. The negative and positve controls performed as expected.