Registration Dossier

Environmental fate & pathways

Biodegradation in water: screening tests

Administrative data

Endpoint:
biodegradation in water: ready biodegradability
Type of information:
migrated information: read-across based on grouping of substances (category approach)
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Results of standard method testing w ere reported in a reliable review dossier.

Data source

Reference
Reference Type:
review article or handbook
Title:
ROBUST SUMMARY OF INFORMATION ON Distillate Fuels
Author:
American Petroleum Institute
Year:
2003
Bibliographic source:
ROBUST SUMMARY OF INFORMATION ON Distillate Fuels pag 7

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
OECD Guideline 301 F (Ready Biodegradability: Manometric Respirometry Test)
Deviations:
not specified
GLP compliance:
not specified

Test material

Reference
Name:
Unnamed
Type:
Constituent

Study design

Oxygen conditions:
not specified
Inoculum or test system:
activated sludge (adaptation not specified)
Duration of test (contact time):
ca. 28 d
Initial test substance concentration
Initial conc.:
ca. 102 mg/L
Based on:
ThOD/L

Results and discussion

% Degradation
Remarks on result:
other: the classification of readily biodegradable cannot be given
Details on results:
The report states that biodegradation of the test sample achieved 60% by the end of the test, but the classification of readily biodegradable cannot be
given to the test sample because it did not achieve the pass level within the 10 day period following 10% biodegradation. However, recent guidance
from OECD states that when testing mixtures of structurally related materials such as oils, the 10-day window should not be applied (OECD 2003). Based on the current OECD recommendations, ultra low sulfur diesel is capable of passing a ready biodegradability test.
Although the test substance was not chemically characterized, the report states that ultra low sulfur diesel of the type tested in this study contains 26- 30% aromatic compounds.

Any other information on results incl. tables

Average biodegradation for duplicate test flasks:

   28 Days  End of 10-d Window
 Ultra low sulfur diesel  60 45 
 Sodium Benzoate (reference)  97  not applicable

Applicant's summary and conclusion