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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:
supporting study
Reliability:
3 (not reliable)

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2008

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)
Version / remarks:
CO2 Evolution Test (modified Sturm
Test) according to the guidelines OECD 301 B and ISO 9439
which determines the ultimate biodegradability of organic
compounds by aerobic microorganisms in water, using
a static aqueous test system as described by Strotmann et al.
(2004).
GLP compliance:
not specified

Test material

Constituent 1
Reference substance name:
Poly(oxy-1,2-ethanediyl), α-methyl-ω-methoxy-
Molecular formula:
N.A.
IUPAC Name:
Poly(oxy-1,2-ethanediyl), α-methyl-ω-methoxy-
Specific details on test material used for the study:
PEG 400 was obtained from BASF (Ludwigshafen, Germany).

Results and discussion

% Degradation
Key result
Parameter:
% degradation (DOC removal)
Value:
> 99
St. dev.:
0
Sampling time:
37 d

BOD5 / COD results

BOD5 / COD
Key result
Parameter:
COD
Value:
ca. 10 other: Doc Remuval per day

Applicant's summary and conclusion

Conclusions:
All of the selected PEGs in a range fromMW250 up to 58,000 Da
are completely biodegradable regardless of the MW in freshwater
media under aerobic conditions using microorganisms
obtained from WWTP sludge