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Toxicological information

Genetic toxicity: in vitro

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Administrative data

Endpoint:
in vitro gene mutation study in bacteria
Remarks:
Type of genotoxicity: gene mutation
Adequacy of study:
other information

Data source

Reference
Reference Type:
other: Body responsible for the test
Title:
Unnamed

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
other: Directive 2000/32/EC, B.13/14 OECD 471 (1997)
GLP compliance:
yes
Type of assay:
bacterial reverse mutation assay

Method

Metabolic activation system:
Rat liver S9-mix induced by a combination of phenobarbital and ß-naphthoflavone.
Test concentrations with justification for top dose:
Concentration range in the main test (with metabolic activation): 10 ... 1000 µg/plate
Concentration range in the main test (without metabolic activation): 10 ... 1000 µg/plate
Vehicle / solvent:
Solvent: Dimethyl sulfoxide
Details on test system and experimental conditions:
Type of bacteria/strain: Salmonella typhimurium reverse mutation assay with four
histidine-requiring strains of Salmonella typhimurium
(TA1535, TA1537, TA100 and TA98) and in the Escherichia coli
reverse mutation assay with a tryptophan-requiring strain
of Escherichia coli WP2uvrA.

Concentration of the test substance resulting in precipitation: 1000 µg/plate

Results and discussion

Test resultsopen allclose all
Species / strain:
other: as specified above
Metabolic activation:
with
Cytotoxicity / choice of top concentrations:
cytotoxicity
Remarks:
(> 5000 µg/plate)
Species / strain:
other: as specified above
Metabolic activation:
without
Cytotoxicity / choice of top concentrations:
cytotoxicity
Remarks:
(> 5000 µg/plate)
Species / strain:
other: as specified above
Metabolic activation:
with
Cytotoxicity / choice of top concentrations:
cytotoxicity
Remarks:
(> 1000 µg/plate)
Species / strain:
other: as specified above
Metabolic activation:
without
Cytotoxicity / choice of top concentrations:
cytotoxicity
Remarks:
(> 1000 µg/plate)
Additional information on results:
Observations:
The test substance did not induce a dose-related, two-fold
increase in the number of revertant (His+) colonies in each
of the four tester strains (TA1535, TA1537, TA98 and TA100)
and in the number of revertant (Trp+) colonies in tester
strain WP2uvrA both in the absence and presence of S9-
metabolic activation. These results were confirmed in an
independently repeated experiment.


In this study, the negative and strain-specific positive
control values were within our laboratory historical control
data ranges indicating that the test conditions were
adequate and that the metabolic activation system functioned
properly.
Remarks on result:
other: other: preliminary test
Remarks:
Migrated from field 'Test system'.

Applicant's summary and conclusion

Conclusions:
Interpretation of results (migrated information):
negative with metabolic activation
negative without metabolic activation