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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
Study period:
NA
Reliability:
1 (reliable without restriction)
Cross-referenceopen allclose all
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to other study

Data source

Reference
Reference Type:
publication
Title:
Unnamed
Year:
1988

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 301 E (Ready biodegradability: Modified OECD Screening Test)
Deviations:
no
Principles of method if other than guideline:
NA
GLP compliance:
not specified

Test material

Constituent 1
Chemical structure
Reference substance name:
2-phosphonobutane-1,2,4-tricarboxylic acid
EC Number:
253-733-5
EC Name:
2-phosphonobutane-1,2,4-tricarboxylic acid
Cas Number:
37971-36-1
Molecular formula:
C7H11O9P
IUPAC Name:
2-phosphonobutane-1,2,4-tricarboxylic acid
Details on test material:
Purity, water content etc. are not indicated in the publication.
Specific details on test material used for the study:
Details on properties of test surrogate or analogue material (migrated information):
NA

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
other: effluent from a sewage treatment plant
Details on inoculum:
Culture medium was inoculated by the effluent from a sewage treatment plant (5 mL/2000 mL).
Duration of test (contact time):
ca. 28 d
Initial test substance concentration
Initial conc.:
32 mg/L
Based on:
test mat.
Parameter followed for biodegradation estimation
Parameter followed for biodegradation estimation:
DOC removal
Details on study design:
The ony carbon source was 2-phosphonobutane-1,2,4-tricarboxylic acid (10 mg C/L).
Reference substance
Reference substance:
aniline

Results and discussion

Preliminary study:
NA
Test performance:
NA
Details on results:
Under test conditions no biodegradation was observed. Percentage degradation is not indicated.

BOD5 / COD results

Results with reference substance:
Nearly complete biodegradation after 7 days.

Any other information on results incl. tables

No remarks.

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Interpretation of results:
under test conditions no biodegradation observed
Conclusions:
2-phosphonobutane-1,2,4-tricarboxylic acid was found not biodegradable in the "Modified OECD-Screening-Test".
Executive summary:

2-phosphonobutane-1,2,4-tricarboxylic acid was examined for biodegradability according to the "Modified OECD-Screening-Test".

Under test conditions no biodegradation was observed.