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EC number: 267-028-5 | CAS number: 67762-63-4
- 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
![](https://echa.europa.eu/o/diss-blank-theme/images/factsheets/A-REACH/factsheet/print_toxicological-information.png)
Genetic toxicity: in vitro
Administrative data
- Endpoint:
- in vitro gene mutation study in bacteria
- Remarks:
- Type of genotoxicity: gene mutation
- Type of information:
- migrated information: read-across based on grouping of substances (category approach)
- Adequacy of study:
- weight of evidence
- Study period:
- 15 Jun - 09 Aug 2010
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: see 'Remark'
- Remarks:
- GLP guideline study, tested with the source substance CAS 544-35-4. According to the ECHA guidance document “Practical guide 6: How to report read-across and categories (March 2010)”, the reliability was changed from RL1 to RL2 to reflect the fact that this study was conducted on a read-across substance.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 010
- Report date:
- 2010
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 471 (Bacterial Reverse Mutation Assay)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method B.13/14 (Mutagenicity - Reverse Mutation Test Using Bacteria)
- Deviations:
- no
- GLP compliance:
- yes
- Type of assay:
- bacterial reverse mutation assay
Test material
- Test material form:
- liquid
Constituent 1
Method
- Target gene:
- his operon for S. typhimurium and trp operon for E. coli
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 WP2 uvr A
- Metabolic activation:
- with and without
- Metabolic activation system:
- cofactor supplemented post-mitochondrial fraction (S9 mix), prepared from the livers of rats treated with phenobarbital and ß-naphthoflavone.
- Test concentrations with justification for top dose:
- 3, 10, 33, 100, 333, 1000, 3330, 5000 µg/plate
- Vehicle / solvent:
- - Vehicle(s)/solvent(s) used: ethanol
Controlsopen allclose all
- Untreated negative controls:
- no
- Negative solvent / vehicle controls:
- yes
- Remarks:
- ethanol
- True negative controls:
- no
- Positive controls:
- yes
- Positive control substance:
- sodium azide
- Remarks:
- without S9-mix
Migrated to IUCLID6: 5 µg/plate for TA1535
- Untreated negative controls:
- no
- Negative solvent / vehicle controls:
- yes
- Remarks:
- ethanol
- True negative controls:
- no
- Positive controls:
- yes
- Positive control substance:
- 9-aminoacridine
- Remarks:
- without S9-mix
Migrated to IUCLID6: 60 µg/plate for TA1537
- Untreated negative controls:
- no
- Negative solvent / vehicle controls:
- yes
- Remarks:
- ethanol
- True negative controls:
- no
- Positive controls:
- yes
- Positive control substance:
- 2-nitrofluorene
- Remarks:
- without S9-mix
Migrated to IUCLID6: 10 µg/plate for TA98
- Untreated negative controls:
- no
- Negative solvent / vehicle controls:
- yes
- Remarks:
- ethanol
- True negative controls:
- no
- Positive controls:
- yes
- Positive control substance:
- methylmethanesulfonate
- Remarks:
- without S9-mix
Migrated to IUCLID6: 650 µg/plate for TA100
- Untreated negative controls:
- no
- Negative solvent / vehicle controls:
- yes
- Remarks:
- ethanol
- True negative controls:
- no
- Positive controls:
- yes
- Positive control substance:
- 4-nitroquinoline-N-oxide
- Remarks:
- without S9-mix
Migrated to IUCLID6: 10 µg/plate for WP2 uvrA
- Untreated negative controls:
- no
- Negative solvent / vehicle controls:
- yes
- Remarks:
- ethanol
- True negative controls:
- no
- Positive controls:
- yes
- Positive control substance:
- other: 2-aminoanthracene: 1 µg/plate for TA98 and TA100; 2.5 µg/plate for TA1535 and TA1537; 10 µg/plate for WPA2uvrA
- Remarks:
- with 5% S9-mix
- Untreated negative controls:
- no
- Negative solvent / vehicle controls:
- yes
- Remarks:
- ethanol
- True negative controls:
- no
- Positive controls:
- yes
- Positive control substance:
- other: 2-aminoanthracene: 1 µg/plate for TA98; 2.5 µg/plate for TA100 and TA1535; 5µg/plate for TA1537; 10 µg/plate for WPA2uvrA
- Remarks:
- with 10% S9-mix
- Details on test system and experimental conditions:
- METHOD OF APPLICATION: in agar (plate incorporation)
DURATION
- Exposure duration: 48 h
NUMBER OF REPLICATIONS: Two independent experiments were performed in triplicates each.
DETERMINATION OF CYTOTOXICITY
- Method: The condition of the bacterial background lawn was evaluated, both macroscopically and microscopically.
In the first experiment S9-mix at 5% (v/v) was used. In the second experiment S9-mix at 10% (v/v) was used.
The revertant colonies (histidine independent or tryptophan independent) were counted manually if less than 40 colonies per plate were present.
If more than 40 colonies were present, these were counted automatically with a Biocount 4000 Pro-S-colony counter.
Plates with abundant test article precipitate which interfered with automated colony counting were counted manually and the evidence of test substance precipitate on the plates was recorded. - Evaluation criteria:
- No formal hypothesis testing was done. A test substance is considered negative (not mutagenic) in the test if:
a) The total number of revertants in tester strain TA100 is not greater than two (2) times the concurrent control, and the total number of revertants in tester strains TA1535, TA1537, TA98 or WP2uvrA is not greater than three (3) times the concurrent control.
b) The negative response should be reproducible in at least one independently repeated experiment. A test substance is considered positive (mutagenic) in the test if:
a) The total number of revertants in tester strain TA100 is greater than two (2) times the concurrent control, or the total number of revertants in tester strains TA1535, TA1537, TA98 or WP2uvrA is greater than three (3) times the concurrent control.
b) In case a repeat experiment is performed when a positive response is observed in one of the tester strains, the positive response should be reproducible in at least one independently repeated experiment.
The preceding criteria were not absolute and other modifying factors might enter into the final
evaluation decision. - Statistics:
- Mean values and standard deviation were calculated.
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
- Cytotoxicity / choice of top concentrations:
- no cytotoxicity, but tested up to precipitating concentrations
- Vehicle controls validity:
- valid
- Untreated 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:
- no cytotoxicity
- Vehicle controls validity:
- valid
- Untreated negative controls validity:
- not examined
- Positive controls validity:
- valid
- Additional information on results:
- TEST-SPECIFIC CONFOUNDING FACTORS
- Precipitation: the test substance slightly precipitated at concentrations ≥1000 µg/plate
RANGE-FINDING/SCREENING STUDIES: No reduction of the bacterial background lawn and no biologically relevant decrease in the number of revertants were observed based on preliminary tests in TA 100 and WP2uvrA up to 5000 µg/plate in triplicate. At the highest concentration the test substance exhibited limited solubility.
COMPARISON WITH HISTORICAL CONTROL DATA: positive and solvent controls were in the range of historical control data - Remarks on result:
- other: all strains/cell types tested
- Remarks:
- Migrated from field 'Test system'.
Any other information on results incl. tables
Table 1: Maximum number of revertants at the first experiment with 5% S9 -mix
|
Maximum number of revertants |
|||||
solvent Control |
positive control |
treatment (at dose level [µg/mL]) |
||||
Strain |
With S9 |
Without S9 |
With S9 |
Without S9 |
With S9 |
Without S9 |
TA 1535 |
8 |
12 |
132 |
893 |
12 (100) |
9 (33) |
TA 1537 |
6 |
7 |
417 |
325 |
10 (33) |
9 (1000) |
TA 98 |
28 |
18 |
963 |
1025 |
34 (33) |
21 (333) |
TA 100 |
77 |
69 |
890 |
1248 |
81 (33) |
86 (100) |
WPA2uvrA |
23 |
19 |
465 |
1159 |
35 (5000) |
32 (3330) |
Table 2: Maximum number of revertants at the second experiment with 10% S9 -mix
|
Maximum number of revertants |
|||||
solvent Control |
positive control |
treatment (at dose level [µg/mL]) |
||||
Strain |
With S9 |
Without S9 |
With S9 |
Without S9 |
With S9 |
Without S9 |
TA 1535 |
7 |
11 |
134 |
838 |
12 (10) |
13 (100) |
TA 1537 |
6 |
6 |
413 |
154 |
6 (333) |
8 (100) |
TA 98 |
25 |
16 |
517 |
981 |
28 (33) |
21 (100) |
TA 100 |
88 |
89 |
1418 |
925 |
83 (10) |
101 (10) |
WPA2uvrA |
23 |
18 |
200 |
1195 |
31 (33) |
27 (10) |
Applicant's summary and conclusion
- Conclusions:
- Interpretation of results (migrated information):
negative
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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