Fuels, diesel

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

Guideline:

OECD Guideline 301 F (Ready Biodegradability: Manometric Respirometry Test)

Deviations:

not specified

GLP compliance:

not specified

Test material

Test material information

Constituent 1

Reference substance name:

Fuels, diesel

EC Number:

269-822-7

EC Name:

Fuels, diesel

Cas Number:

68334-30-5

IUPAC Name:

1-(heptan-2-yl)-4-hexyl-2-(3-methylhexyl)cyclopentane; 1-butyl-2-(nonan-3-yl)-4-propylbenzene; 2,3,7-trimethyl-6-(propan-2-yl)nonane; triacontane

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