Registration Dossier

Administrative data

Endpoint:
in vitro gene mutation study in bacteria
Remarks:
Type of genotoxicity: gene mutation
Type of information:
experimental study
Adequacy of study:
other information
Reliability:
1 (reliable without restriction)

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1988
Report Date:
1988

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
OECD Guideline 471 (Bacterial Reverse Mutation Assay)
GLP compliance:
yes
Type of assay:
bacterial reverse mutation assay

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
99.0 %

Method

Target gene:
In the Salmonella typhimurium strains (TA 1535, TA 100, TA 1537, TA 1538, TA 98) the amino acid histidine locus is the target gene.
In the Escherichia coli strain (WP2 uvrA) the amino acid tryptophan locus is the target gene.
Species / strainopen allclose all
Species / strain:
S. typhimurium TA 1535, TA 1537, TA 98 and TA 100
Metabolic activation:
with and without
Metabolic activation system:
Rat liver S-9 mix from Aroclor 1254 induced rats
Species / strain:
E. coli WP2 uvr A
Metabolic activation:
with and without
Metabolic activation system:
Rat liver S-9 mix from Aroclor 1254 induced rats
Test concentrations with justification for top dose:
0, 4, 20, 100, 500, 2500, 10000 µg/plate
Controls
Negative controls:
yes
Positive controls:
yes

Results and discussion

Test resultsopen allclose all
Species / strain:
S. typhimurium TA 1535, TA 1537, TA 98 and TA 100
Metabolic activation:
with and without
Genotoxicity:
negative
Species / strain:
E. coli WP2 uvr A
Metabolic activation:
with and without
Genotoxicity:
negative

Applicant's summary and conclusion

Conclusions:
2,6-Dichlorobenzal chloride is not mutagenic in these bacterial test systems either with or without exogenous metabolic activation at the dose levels investigated.