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 from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Study period:
1995
Reliability:
1 (reliable without restriction)

Data source

Reference
Reference Type:
review article or handbook
Title:
ROBUST SUMMARY OF INFORMATION ON LUBRICATING OIL BASESTOCKS
Author:
American Petroleum Institute
Year:
2003
Bibliographic source:
ROBUST SUMMARY OF INFORMATION ON LUBRICATING OIL BASESTOCKS pag 10-11

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:
aerobic
Inoculum or test system:
activated sludge, domestic (adaptation not specified)
Duration of test (contact time):
ca. 28 d

Results and discussion

% Degradation
Parameter:
% degradation (O2 consumption)
Value:
ca. 31.13
Sampling time:
28 d
Details on results:
By day 28, 31% degradation of the test material was observed and indicated that the test material was inherently biodegradable. By day 5, >60% biodegradation of positive control was observed, which meets the guideline requirement. No excursions from the protocol were noted.

Biodegradation was based on net oxygen consumption and the theoretical oxygen demand of the test material as calculated using results of an elemental analysis of the test material.

Any other information on results incl. tables

 Sample % Degradation* (day 28)   Mean % Degradation (day 28)
HHP   32.93, 27.2, 33.27  31.13
 Na Benzoate 82.04; 72.88   77.46

Applicant's summary and conclusion