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Environmental fate & pathways

Biodegradation in water: screening tests

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Administrative data

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Reference
Endpoint:
biodegradation in water: ready biodegradability
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 301 F (Ready Biodegradability: Manometric Respirometry Test)
GLP compliance:
not specified
Remarks:
not specified in the report
Oxygen conditions:
aerobic
Inoculum or test system:
activated sludge, domestic (adaptation not specified)
Details on inoculum:
Activated sludge from the Montpellier wastewater treatment plant (France) treating mainly domestic wastewater.
Duration of test (contact time):
28 d
Initial conc.:
55.5 mg/L
Based on:
test mat.
Parameter followed for biodegradation estimation:
DOC removal
Details on study design:
Preparation of test mixtures:
The amount of product is added directly to the test vials containing the mineral medium. After the addition of approximately 340 mL of mineral medium, the pH is measured in the test batch vials of sample and then adjusted to 7,4 ± 0,2 if necessary with HCl (1N) or NaOH (1N). If necessary, the pH of the vial "product toxicity control" vial is also adjusted. The inoculum is then added to the vials and the volume adjusted to 365 mL.
Reference substance:
acetic acid, sodium salt
Key result
Parameter:
% degradation (DOC removal)
Value:
91
Sampling time:
28 d
Details on results:
The test product "Diethyl Sebacate Batch 17227003" is considered to be readily biodegradable with a rate of biodegradability higher than 60% after 28 days and within the 10-d window.
Results with reference substance:
The biodegradation rate of the reference substance (Sodium Acetate) was greater than 70% on the eighth day.
Validity criteria fulfilled:
yes
Interpretation of results:
readily biodegradable
Conclusions:
Under the experimental conditions, the sample "DIETHYL SEBACATE Batch 1727003" is considered to be readily biodegradable. This substance is 91% biodegradable within 28 days and exhibits a biodegradation rate higher than 60% within the 10-d window.
Executive summary:

For that endpoint, one reliable study performed on the registered substance and according to the OECD 301F guideline was available.

Under the experimental conditions, the sample "DIETHYL SEBACATE Batch 1727003" is considered to be readily biodegradable. This substance is 91% biodegradable within 28 days and exhibits a biodegradation rate higher than 60% within the 10-d window.

The validity criteria were successful and the study was therefore regarded as acceptable for that endpoint.

Description of key information

For that endpoint, one reliable study performed on the registered substance and according to the OECD 301F guideline was available.

Under the experimental conditions, the sample "DIETHYL SEBACATE Batch 1727003" is considered to be readily biodegradable. This substance is 91% biodegradable within 28 days and exhibits a biodegradation rate higher than 60% within the 10-d window.

The validity criteria were successful and the study was therefore regarded as acceptable for that endpoint.

Key value for chemical safety assessment

Biodegradation in water:
readily biodegradable
Type of water:
other:

Additional information