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EC number: 829-719-5 | CAS number: 1190865-44-1
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data
Genetic toxicity: in vitro
Administrative data
- Endpoint:
- in vitro gene mutation study in bacteria
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- From 2014-04-30 to 2014-06-05
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 014
- Report date:
- 2014
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 471 (Bacterial Reverse Mutation Assay)
- Version / remarks:
- 1997
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of assay:
- bacterial reverse mutation assay
Test material
- Reference substance name:
- 1-(3,5-dichloro-4-fluorophenyl)-2,2,2-trifluoroethanone
- EC Number:
- 829-719-5
- Cas Number:
- 1190865-44-1
- Molecular formula:
- C8H2Cl2F4O
- IUPAC Name:
- 1-(3,5-dichloro-4-fluorophenyl)-2,2,2-trifluoroethanone
Constituent 1
- Specific details on test material used for the study:
- Batch No.: CPFOA1301
Purity: 98.5%
Method
- Target gene:
- histidine locus of Salmonella strains, tryptophan operon of E. coli tester strain
Species / strainopen allclose all
- Species / strain / cell type:
- E. coli WP2 uvr A
- Species / strain / cell type:
- S. typhimurium TA 1535, TA 1537, TA 98 and TA 100
- Metabolic activation:
- with and without
- Metabolic activation system:
- Metabolic activation system
Type and composition of metabolic activation system:
- source of S9: Lot No. PB/βNF S9 02 March 2014 was used in this study. The S9 Microsomal fraction was prepared in-house from male rats induced with Phenobarbitone/β-Naphthoflavone at 80/100 mg/kg/day, orally, for 3 days prior to preparation on day 4.
- method of preparation of S9 mix: The S9-mix was prepared before use using sterilized co-factors and maintained on ice for the duration of the test with following recipe:
S9: 5.0 mL
1. 65 M KCl/0.4 M MgCl2: 1.0 mL
0.1 M Glucose-6-phosphate: 2.5 mL
0.1 M NADP: 2.0 mL
0.2 M Sodium phosphate buffer (pH 7.4): 25.0 mL
Sterile distilled water: 14.5 mL
- concentration or volume of S9 mix and S9 in the final culture medium:
Experiment 1: 0.5 mL of S9-mix was added to molten trace amino-acid supplemented media (final volume 2.0 mL).
Experiment 2: 0.5 mL of S9-mix was added to the tube together with 0.1 mL of the appropriate bacterial strain culture, and 0.1 mL of the test item formulation, vehicle or 0.1 mL of appropriate positive control and incubated at 37 ℃ for 20 mins prior to addition of 2 mL of molten amino-acid supplemented media and subsequent plating onto Vogel-Bonner plates.
- quality controls of S9: S9-mix used in both experiments was shown to be sterile - Test concentrations with justification for top dose:
- Experiment 1 - Plate Incorporation Method: 1.5, 5, 15, 50, 150, 500, 1500 and 5000 μg/plate, the maximum dose level of the test item was selected as the maximum recommended dose level of 5000 μg/plate.
Experiment 2 - Pre-Incubation Method:
Salmonella strains (with and without S9-mix): 0.5, 1.5, 5, 15, 50, 150, 500 μg/plate.
E. coli strain WP2uvrA (with and without S9-mix): 1.5, 5, 15, 50, 150, 500, 1500 μg/plate.
The test item induced a visible reduction in the growth of the bacterial background lawns of the Salmonella tester strains from 500 μg/plate and Escherichia coli strain WP2uvr A from 1500 μg/plate in both the presence and absence of metabolic activation (S9-mix) in the first mutation test (plate incorporation method). Consequently, the toxic limit of the test item was selected as the maximum dose level in the second mutation test (pre-incubation method). - Vehicle / solvent:
- - Vehicle(s)/solvent(s) used: dimethyl sulphoxide (DMSO)
- Justification for choice of solvent/vehicle: The test item was immiscible in sterile distilled water at 50 mg/mL but was fully miscible in dimethyl sulphoxide in solubility checks performed in-house. Dimethyl sulphoxide was selected as the vehicle.
Controlsopen allclose all
- Untreated negative controls:
- yes
- Negative solvent / vehicle controls:
- yes
- True negative controls:
- no
- Positive controls:
- yes
- Positive control substance:
- other: 2-Aminoanthracene (2AA): For TA100, TA1535, TA1537 and WP 2uvrA with S9-mix
- Untreated negative controls:
- yes
- Negative solvent / vehicle controls:
- yes
- True negative controls:
- no
- Positive controls:
- yes
- Positive control substance:
- benzo(a)pyrene
- Untreated negative controls:
- yes
- Negative solvent / vehicle controls:
- yes
- True negative controls:
- no
- Positive controls:
- yes
- Positive control substance:
- N-ethyl-N-nitro-N-nitrosoguanidine
- Untreated negative controls:
- yes
- Negative solvent / vehicle controls:
- yes
- True negative controls:
- no
- Positive controls:
- yes
- Positive control substance:
- 9-aminoacridine
- Untreated negative controls:
- yes
- Negative solvent / vehicle controls:
- yes
- True negative controls:
- no
- Positive controls:
- yes
- Positive control substance:
- 4-nitroquinoline-N-oxide
- Details on test system and experimental conditions:
- NUMBER OF REPLICATIONS:
- Number of cultures per concentration: in triplicate
- Number of independent experiments: 2
METHOD OF TREATMENT/ EXPOSURE:
- Test substance added in agar: plate incorporation (Experiment 1); pre-incubation (Experiment 2)
TREATMENT AND HARVEST SCHEDULE:
- Pre-incubation period: Experiment 2: 20 minutes
- Exposure duration/duration of treatment: 48 h
METHODS FOR MEASUREMENT OF CYTOTOXICITY
- Method: viewed microscopically for evidence of thinning (toxicity)
METHODS FOR MEASUREMENTS OF GENOTOXICIY
- OTHER: All of the plates were scored for the presence of revertant colonies using an automated colony counting system. Occasional plates were manually counted for accuracy. - Evaluation criteria:
- Any, one, or all of the following can be used to determine the overall positive result of the study:
1. A dose-related increase in mutant frequency over the dose range tested (De Serres and Shelby, 1979).
2. A reproducible increase at one or more concentrations.
3. Biological relevance against in-house historical control ranges.
4. Statistical analysis of data as determined by UKEMS (Mahon et al., 1989).
5. Fold increase greater than two times the concurrent solvent control for any tester strain (especially if accompanied by an out-of-historical range response (Cariello and Piegorsch, 1996)).
A test item will be considered non-mutagenic (negative) in the test system if the above criteria are not met.
Although most experiments will give clear positive or negative results, in some instances the data
generated will prohibit making a definite judgment about test item activity. Results of this type will be reported as equivocal.
Results and discussion
Test resultsopen allclose all
- Species / strain:
- S. typhimurium TA 1535
- Metabolic activation:
- with and without
- Genotoxicity:
- negative
- Cytotoxicity / choice of top concentrations:
- cytotoxicity
- Vehicle controls validity:
- valid
- Untreated negative controls validity:
- valid
- True negative controls validity:
- not examined
- Positive controls validity:
- valid
- Species / strain:
- S. typhimurium TA 1537
- Metabolic activation:
- with and without
- Genotoxicity:
- negative
- Cytotoxicity / choice of top concentrations:
- cytotoxicity
- Vehicle controls validity:
- valid
- Untreated negative controls validity:
- valid
- True negative controls validity:
- not examined
- Positive controls validity:
- valid
- Species / strain:
- S. typhimurium TA 98
- Metabolic activation:
- with and without
- Genotoxicity:
- negative
- Cytotoxicity / choice of top concentrations:
- cytotoxicity
- Vehicle controls validity:
- valid
- Untreated negative controls validity:
- valid
- True negative controls validity:
- not examined
- Positive controls validity:
- valid
- Species / strain:
- S. typhimurium TA 100
- Metabolic activation:
- with and without
- Genotoxicity:
- negative
- Cytotoxicity / choice of top concentrations:
- cytotoxicity
- Vehicle controls validity:
- valid
- Untreated negative controls validity:
- valid
- True negative controls validity:
- not examined
- Positive controls validity:
- valid
- Species / strain:
- E. coli WP2 uvr A
- Metabolic activation:
- with and without
- Genotoxicity:
- negative
- Cytotoxicity / choice of top concentrations:
- cytotoxicity
- Vehicle controls validity:
- valid
- Untreated negative controls validity:
- valid
- True negative controls validity:
- not examined
- Positive controls validity:
- valid
- Additional information on results:
- Ames test:
- Signs of toxicity: The test item induced a visible reduction in the growth of the bacterial background lawns of the Salmonella tester strains from 500 μg/plate and Escherichia coli strain WP2uvrA from 1500 μg/plate in both the presence and absence of metabolic activation (S9-mix) in the first mutation test (plate incorporation method). Results from the second mutation test showed weakened lawns to all of the Salmonella strains from 150 μg/plate and to Escherichia coli strain WP2uvrA from 500 μg/plate in both the presence and absence of S9-mix.
- Genotoxicity: There were no significant increases in the frequency of revertant colonies recorded for any of the bacterial strains, with any dose of the test item, either with or without metabolic activation in Experiment 1 (plate incorporation method). Similarly, no toxicologically significant increases in the frequency of revertant colonies were recorded for any of the bacterial strains, with any dose of the test item, either with or without metabolic activation in Experiment 2 (pre-incubation method). A small, statistically significant increase in TA1537 revertant colony frequency was observed in the presence of S9-mix at 50μg/plate in the second mutation test. This increase was considered to be of no biological relevance because there was no evidence of a dose-response relationship or reproducibility. Furthermore, the individual revertant colony counts at 50μg/plate were within the in-house historical untreated/vehicle control range for the tester strain and the maximum fold increase was only 1.8 times the concurrent vehicle control.
- Precipitate: No test item precipitate was observed on the plates at any of the doses tested in either the presence or absence of S9-mix.
- Positive/negative control results:
Results for the negative controls (spontaneous mutation rates) were considered to be acceptable.
All of the positive control chemicals used in the test induced marked increases in the frequency of revertant colonies thus confirming the activity of the S9-mix and the sensitivity of the bacterial strains.
Applicant's summary and conclusion
- Conclusions:
- The test item was considered to be non-mutagenic under the conditions of this test.
- Executive summary:
The purpose of the study was to evaluate test item for the ability to induce reverse mutations, either directly or after metabolic activation, at the histidine or tryptophan locus in the genome of five strains of bacteria based on OECD 471.
Salmonella typhimurium strains TA1535, TA1537, TA98 and TA100 and Escherichia coli strain WP2uvrA were treated with the test item using both the Ames plate incorporation and pre-incubation methods at up to eight dose levels, in triplicate, both with and without the addition of a rat liver homogenate metabolizing system (10% liver S9 in standard co-factors).
The maximum dose level of the test item in the first experiment was selected as the maximum recommended dose level of 5000 μg/plate. The test item induced a visible reduction in the growth of the bacterial background lawns of the Salmonella tester strains from 500 μg/plate and Escherichia coli strain WP2uvrA from 1500 μg/plate in both the presence and absence of metabolic activation (S9-mix) in the first mutation test (plate incorporation method). Consequently, the toxic limit of the test item was selected as the maximum dose level in the second mutation test (pre-incubation method). Results from the second mutation test showed weakened lawns to all of the Salmonella strains from 150 μg/plate and to Escherichia coli strain WP2uvrA from 500 μg/plate in both the presence and absence of S9-mix. No test item precipitate was observed on the plates at any of the doses tested in either the presence or absence of S9-mix.
There were no significant increases in the frequency of revertant colonies recorded for any of the bacterial strains, with any dose of the test item, either with or without metabolic activation in Experiment 1 (plate incorporation method). Similarly, no toxicologically significant increases in the frequency of revertant colonies were recorded for any of the bacterial strains, with any dose of the test item, either with or without metabolic activation in Experiment 2 (pre-incubation method). A small, statistically significant increase in TA1537 revertant colony frequency was observed in the presence of S9-mix at 50μg/plate in the second mutation test. This increase was considered to be of no biological relevance because there was no evidence of a dose-response relationship or reproducibility. Furthermore, the individual revertant colony counts at 50μg/plate were within the in-house historical untreated/vehicle control range for the tester strain and the maximum fold increase was only 1.8 times the concurrent vehicle control.
The test item was considered to be non-mutagenic under the conditions of this test.
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