Registration Dossier

Administrative data

Endpoint:
in vitro gene mutation study in bacteria
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2017
Reliability:
1 (reliable without restriction)

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2017
Report date:
2017

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
OECD Guideline 471 (Bacterial Reverse Mutation Assay)
Qualifier:
according to guideline
Guideline:
EU Method B.13/14 (Mutagenicity - Reverse Mutation Test Using Bacteria)
GLP compliance:
yes
Type of assay:
bacterial reverse mutation assay

Test material

Constituent 1
Chemical structure
Reference substance name:
Thuj-4(10)-ene
EC Number:
222-212-4
EC Name:
Thuj-4(10)-ene
Cas Number:
3387-41-5
Molecular formula:
C10H16
IUPAC Name:
4-methylidene-1-(propan-2-yl)bicyclo[3.1.0]hexane

Method

Species / strain
Species / strain / cell type:
other: Salmonella typhimurium (TA97a, TA98, TA100, TA102 and TA1535)
Metabolic activation:
with and without
Controls
Untreated negative controls:
no
Negative solvent / vehicle controls:
yes
True negative controls:
no
Positive controls:
yes
Positive control substance:
sodium azide
benzo(a)pyrene
other: 4-Nitro-1.2-phenylene Diamine,2-Amino-Anthracene

Results and discussion

Test resultsopen allclose all
Key result
Species / strain:
other: TA97a
Metabolic activation:
with and without
Genotoxicity:
positive
Cytotoxicity / choice of top concentrations:
cytotoxicity
Vehicle controls validity:
not valid
Untreated negative controls validity:
not valid
Positive controls validity:
valid
Key result
Species / strain:
S. typhimurium TA 100
Metabolic activation:
with and without
Genotoxicity:
positive
Cytotoxicity / choice of top concentrations:
cytotoxicity
Vehicle controls validity:
not valid
Untreated negative controls validity:
not valid
Positive controls validity:
valid

Applicant's summary and conclusion

Conclusions:
Based on the results of this study it is concluded that Thuj-4(10)-ene is mutagenic in the Salmonella typhimurium strain TA1535 in the absence and presence of metabolic activation under the experimental conditions in this study.