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EC number: 614-070-0 | CAS number: 674773-12-7
- 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
- Remarks:
- Type of genotoxicity: gene mutation
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2010
- Reliability:
- 1 (reliable without restriction)
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 010
- Report date:
- 2011
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 471 (Bacterial Reverse Mutation Assay)
- Version / remarks:
- and EU Method B.13/14 (Mutagenicity - Reverse Mutation Test Using Bacteria)
- GLP compliance:
- yes (incl. QA statement)
- Type of assay:
- bacterial reverse mutation assay
Test material
- Reference substance name:
- methyl 5-amino-4-cyano-3-(2-methoxy-2-oxoethyl)thiophene-2-carboxylate
- Cas Number:
- 674773-12-7
- Molecular formula:
- C10H10N2O4S
- IUPAC Name:
- methyl 5-amino-4-cyano-3-(2-methoxy-2-oxoethyl)thiophene-2-carboxylate
- Details on test material:
- - Name of test material (as cited in study report):
- Molecular formula (if other than submission substance):
- Molecular weight (if other than submission substance):
- Smiles notation (if other than submission substance):
- InChl (if other than submission substance):
- Structural formula attached as image file (if other than submission substance): see Fig.
- Substance type: organic
- Physical state: solid
- Analytical purity:
- Impurities (identity and concentrations):
- Composition of test material, percentage of components:
- Isomers composition:
- Purity test date:
- Lot/batch No.: 7029-238
- Expiration date of the lot/batch:
- Radiochemical purity (if radiolabelling):
- Specific activity (if radiolabelling):
- Locations of the label (if radiolabelling):
- Expiration date of radiochemical substance (if radiolabelling):
- Stability under test conditions:
- Storage condition of test material:
- Other:
Constituent 1
Method
- Target gene:
- histidine
Species / strainopen allclose all
- Species / strain / cell type:
- S. typhimurium TA 1535, TA 1537, TA 98 and TA 100
- Species / strain / cell type:
- E. coli, other: WP2 pKM101 and WP2 uvrA pKM101
- Metabolic activation:
- with and without
- Metabolic activation system:
- Arochlor induced rat liver S9
- Test concentrations with justification for top dose:
- 1.6, 8, 40, 200, 1000 and 5000 microgramm/plate
- Vehicle / solvent:
- Dimethyl sulphoxide (DMSO)
Controls
- Untreated negative controls:
- no
- Negative solvent / vehicle controls:
- yes
- Remarks:
- DMSO
- True negative controls:
- no
- Positive controls:
- yes
- Positive control substance:
- 4-nitroquinoline-N-oxide
- 9-aminoacridine
- 2-nitrofluorene
- sodium azide
- benzo(a)pyrene
- Remarks:
- Migrated to IUCLID6: and 2-anthramine
- Details on test system and experimental conditions:
- -direct plating preincubation
-independent experiments-triplicates/concentrations - Evaluation criteria:
- -genotoxicity (bacterial lawn and number of revertants)
-genotoxictity (number of revertants) - Statistics:
- Statistical analysis using automated decision tree.
For positive control, Student t test versus vehicle control on square root data.
Results and discussion
Test results
- Species / strain:
- S. typhimurium TA 1535, TA 1537, TA 98 and TA 100
- Metabolic activation:
- with and without
- Genotoxicity:
- negative
- Cytotoxicity / choice of top concentrations:
- no cytotoxicity
- Vehicle controls validity:
- valid
- Untreated negative controls validity:
- valid
- Positive controls validity:
- valid
- Additional information on results:
- An initial toxicity Range-Finder experiment was carried out in the absence and in the presence of S-9 in strain TA100 only, using final concentrations of test substance at 1.6, 8, 40, 200, 1000 and 5000 microgram/plate, plus negative (vehicle) and positive controls. Following these treatments, no evidence of toxicity was observed. These data were considered to be acceptable for mutation assessment and are presented as TA 100 mutagenicity data for Experiment 1.
Experiment 1 treatments of the remaining tester strains were performed in the absence and in the presence of S9 and retained the concentrations employed for the Range-finder Experiment. Following these treatments evidence of toxicity was observed in strcin TA1537 in the absence and presence of S-9 at 5000 mikrogram/plate, with some evidence of toxicity also apparent in strain TA98 in the absence of S-9 at 5000 microgram/plate.
Experiment 2 treatments of all tester strains were performed in the absence and in the presence of S-9. the maximum test concentration of 5000 mikrogram/plate was retained for all strains. Narrowed concentration intervals were employed covering the ranges 78.13-5000 microgramm/plate for strain TA 1537 or 156.3-5000 microgramm/plate for all remaining strains in order to examine more closely those concentrations of the test substance approaching the maximum test concentration and concidered therefore most likely providence of mutagenic activity. In addition, all treatments in the presence of S-9 were further modified by the inclusion of a pre-incubation step. In this way, it was hoped to increase the range of mutagenic chemicals that could be detected using this assay system. Following these treatments possible evidence of toxicity was observed in strain TA 1537 in the absence of S-9 only at 2500 and 5000 microgramm/plate.
No precipitation was observed on the test plates following incubation.
Negative vehicle and positive control treatments were included for all strains in both experiments. The mean numbers of revertant colonies on negative control plates all fell within acceptable ranges and were sigificantly elevated by positive control treatments.
Although a statistically significant increase in revertant numbers was observed following test substance treatments of strain WP2 uvrA pKM101 in the absence of S-9 at 1250 microgramm/plate in Experiment 2 (Dunnett's test 1 % level), this was not concentration related or reproducible and was of sufficient magnitude to be considered as clear evidence of mutagenic activity in this assay system. - Remarks on result:
- other: all strains/cell types tested
- Remarks:
- Migrated from field 'Test system'.
Applicant's summary and conclusion
- Conclusions:
- Interpretation of results (migrated information):
negative
In conclusion the test substance did not induce mutation in four histidine-requiring strains of Salmonella typhimurium (TA98, TA100, TA 1535 and TA 1537) and two tryptophan-requiring strains of Escherichia coli (WP2 pKM101 and WP2 uvrA pKM101) when tested under the conditions of this study. These cnditions included treatments at concentrations up to 5000 microgram/plate in the absence and in the presence of rat iver metabolic activation system (S-9).
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