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Environmental fate & pathways

Biodegradation in water: screening tests

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Reference
Endpoint:
biodegradation in water: screening tests
Type of information:
experimental study
Adequacy of study:
weight of evidence
Study period:
1977
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
comparable to guideline study with acceptable restrictions
Principles of method if other than guideline:
The 5 day Biological Oxygen Demand (BOD5) was measured at 0.1, 1.0 and 10 g/L (with each time 5 or 25 mL/500 mL).
The Chemical Oxygen Demand (COD) was measured by titration.
GLP compliance:
no
Specific details on test material used for the study:
Test material: FAT 36034/W
Oxygen conditions:
not specified
Inoculum or test system:
not specified
Duration of test (contact time):
5 d
Preliminary study:
No data
Test performance:
No data
Remarks on result:
not measured/tested
Details on results:
No data
Key result
Parameter:
BOD5
Value:
54 mg O2/g test mat.
Key result
Parameter:
COD
Value:
1 317 mg O2/g test mat.
Key result
Parameter:
BOD5*100/COD
Value:
4
Results with reference substance:
No data

BOD/COD = 0.04

Interpretation of results:
not readily biodegradable
Conclusions:
BOD5: 54 mg 02/g ;
COD: 1317 mg 02/g;
Executive summary:

A study was conducted to evaluate the biodegradation potential of the test substance (of ca. 40 % purity) via BOD5 and COD determination. The BOD5 and COD for FAT 36034/A were determined to be 54 mg O2/g and 1317 mg O2/g, respectively. The ratio of these values was equivalent to 0.04, indicating that the substance showed low biodegradation potential under the test conditions.

Description of key information

A study was conducted to evaluate the biodegradation potential of the test substance (of ca. 40 % purity) via BOD5 and COD determination. The BOD5 and COD for FAT 36034/A were determined to be 54 mg O2/g and 1317 mg O2/g, respectively. The ratio of these values was equivalent to 0.04, indicating that the substance showed low biodegradation potential under the test conditions.


The COD of FAT 36034/E was determined to 1685 mg O2/g when assessed according to EU Method C.6.

Key value for chemical safety assessment

Biodegradation in water:
under test conditions no biodegradation observed
Type of water:
freshwater

Additional information