Registration Dossier
Registration Dossier
Data platform availability banner - registered substances factsheets
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Diss Factsheets
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 422-940-4 | CAS number: -
- 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:
- From 01 November 1995 to 06 March 1996
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: GLP study conducted according to OECD Guideline 471 without any deviation
Cross-referenceopen allclose all
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to other study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 996
- Report date:
- 1996
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 471 (Bacterial Reverse Mutation Assay)
- Version / remarks:
- 1983
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 472 (Genetic Toxicology: Escherichia coli, Reverse Mutation Assay)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method B.13/14 (Mutagenicity - Reverse Mutation Test Using Bacteria)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- JAPAN: Guidelines for Screening Mutagenicity Testing Of Chemicals
- Deviations:
- no
- Principles of method if other than guideline:
- Not applicable
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- Germany GLP Compliance Programme (inspected on 05/06/07 April 1995/signed on 1995-08-02)
- Type of assay:
- bacterial reverse mutation assay
Test material
- Reference substance name:
- -
- EC Number:
- 422-940-4
- EC Name:
- -
- Cas Number:
- 155633-54-8
- Molecular formula:
- C24H39N3O3Si3
- IUPAC Name:
- 2-(2H-1,2,3-benzotriazol-2-yl)-4-methyl-6-[2-methyl-3-(2,2,4,6,6-pentamethyl-3,5-dioxa-2,4,6-trisilaheptan-4-yl)propyl]phenol
- Test material form:
- other: solid
- Details on test material:
- - Name of test material (as cited in study report): G4375
- Physical state: whitish solid
- Analytical purity: > 99%
- Impurities (identity and concentrations): Methanol (<100 ppm) and Isopropanol (<100 ppm)
- Purity test date: certificate of analysis 20/10/1995
- Lot/batch No.: DEF/C 95003/B
- Expiration date of the lot/batch: September 1996 (retest date)
- Stability under test conditions: No data
- Storage condition of test material: room temperature, avoid UV irradiation
Constituent 1
Method
- Target gene:
- Histidine gene
Species / strainopen allclose all
- Species / strain / cell type:
- S. typhimurium TA 1535, TA 1537, TA 98 and TA 100
- Details on mammalian cell type (if applicable):
- Not applicable
- Additional strain / cell type characteristics:
- other: see table 7.6.1/1
- Species / strain / cell type:
- E. coli WP2
- Details on mammalian cell type (if applicable):
- Not applicable
- Species / strain / cell type:
- E. coli WP2 uvr A
- Details on mammalian cell type (if applicable):
- Not applicable
- Metabolic activation:
- with and without
- Metabolic activation system:
- 15% S9 mix; S9 fraction prepared from liver homogenates of Wistar male rats induced with Aroclor 1254
- Test concentrations with justification for top dose:
- PRELIMINARY CYTOTOXICITY ASSAY:
Experiment with and without S9 mix (plate incorporation method): 3.3, 10.0, 33.3, 100.0, 333.3, 1000.0, 2500.0 and 5000.0 µg/plate (TA 98, TA 100)
MUTAGENICITY ASSAY:
Experiment 1 with and without S9 mix (plate incorporation method): 33.3, 100.0, 333.3, 1000.0, 2500.0 and 5000.0 µg/plate (TA 1535, TA 1537, TA 98, TA 100, WP2 and WP2 uvrA)
Experiment 2 with and without S9 mix (Pre-incubation method): 33.3, 100.0, 333.3, 1000.0, 2500.0 and 5000.0 µg/plate (TA 1535, TA 1537, TA 98, TA 100, WP2 and WP2 uvrA) - Vehicle / solvent:
- - Vehicle(s)/solvent(s) used: acetone
- Justification for choice of solvent/vehicle: the solvent was chosen because of its solubility properties and its relative non-toxicity for the bacteria.
Controlsopen allclose all
- Untreated negative controls:
- no
- Negative solvent / vehicle controls:
- yes
- Remarks:
- acetone
- True negative controls:
- yes
- Remarks:
- untreated
- Positive controls:
- yes
- Positive control substance:
- other: 2-aminoanthracene
- Remarks:
- With S9 mix
- Untreated negative controls:
- no
- Negative solvent / vehicle controls:
- yes
- Remarks:
- acetone
- True negative controls:
- yes
- Remarks:
- untreated
- Positive controls:
- yes
- Positive control substance:
- sodium azide
- methylmethanesulfonate
- other: 4-nitro-o-phenylene-diamine
- Remarks:
- Without S9 mix
- Details on test system and experimental conditions:
- METHOD OF APPLICATION:
Experiment 1:in agar (plate incorporation)
Experiment 2: preincubation
DURATION
- Preincubation period: 60 min at 37°C
- Exposure duration: 48h at 37°C
NUMBER OF REPLICATIONS:
- Preliminary toxicity study: 1 plate/dose
- Mutation studies: 3 plates/dose
NUMBER OF CELLS EVALUATED: no data
DETERMINATION OF CYTOTOXICITY
- Method: reduction the number of spontaneous revertants or clearing of the bacterial background lawn.:
OTHER:
- The colonies were counted using the AUTOCOUNT (Artek Systems Corporation, BIOSYS Gmbh, D-61184 Karben, FRG). - Evaluation criteria:
- The generally accepted conditions for the evaluation of the results are:
- corresponding background growth on both negative control and test plates
- normal range of spontaneous reversion rates
A test article is considered positive if either a dose related and reproducible increase in the number of revertants or reproducible increase for at least one test concentration is induced.
A test article is considered mutagenic if in the strains TA98, TA100, WP2, and its uvrA derivate, the number of reversions will be at least twice as high, and in the strains TA1535 and TA1537 at least three times higher as compared to the spontaneous reversion rate.
Also, a dose-dependent and reproducible increase in the number of revertants is regarded as an indication of possibly existing mutagenic potential of the test article regardless whether the highest dose induced the above described enhancement factors or not. - Statistics:
- None
Results and discussion
Test resultsopen allclose all
- Key result
- Species / strain:
- S. typhimurium TA 1535
- 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
- Key result
- Species / strain:
- S. typhimurium TA 1537
- 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
- Key result
- Species / strain:
- S. typhimurium TA 98
- 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
- Key result
- Species / strain:
- S. typhimurium 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
- Key result
- Species / strain:
- E. coli WP2
- 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
- Key result
- 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:
- valid
- Positive controls validity:
- valid
- Additional information on results:
- TEST-SPECIFIC CONFOUNDING FACTORS
- Effects of pH: no data
- Effects of osmolality: no data
- Evaporation from medium: no data
- Water solubility: no data
- Precipitation: None
- Other confounding effects: None
RANGE-FINDING/SCREENING STUDIES: no toxic effects, evidenced by a reduction in the number of revertants, occurred in the groups with and without metabolic activation in all strains used.
MUTATION STUDIES:
- No substantial increases in revertant colony numbers of any of the six tester strains were observed following treatment with the test item at any dose level, either in the presence or absence of metabolic activation.
- There was also no tendency of higher mutation rates with increasing concentrations in the range below the generally acknowledged border of biological relevance.
- Positive controls showed distinct increase of induced revertant colonies.
COMPARISON WITH HISTORICAL CONTROL DATA: not applicable - Remarks on result:
- other: all strains/cell types tested
Any other information on results incl. tables
See the attached document for information on tables of results
Applicant's summary and conclusion
- Conclusions:
- Interpretation of results: negative with and without metabolic activation
Under these test conditions, Silatrizole was found to be not mutagenic in S. typhimurium strains TA98, TA100, TA1535 and TA1537 and in Escherichia Coli stains WP2 and WP2 uvrA with and without metabolic activation according to the Regulation (EC) N° 1272-2008 (CLP) and according to the Directive 67/548/EEC. - Executive summary:
In a reverse gene mutation assay in bacteria, performed according to the OECD Guideline 471 and in compliance with GLP, strains of Salmonella typhimurium (TA 1535, TA 1537, TA 98, TA 100) and of Escherichia Coli (WP2 and WP2 uvrA) were exposed to Silatrizole diluted in acetone at the following concentrations for mutagenicity assays (direct incorporation method in experiment 1 and pre-incubation method in experiment 2): 33.3, 100.0, 333.3, 1000.0, 2500.0 and 5000.0 µg/plate in the presence or in the absence of metabolic activation. Metabolic activation system used in this study was 15 % S9 mix. S9 fraction was prepared from liver homogenates of Wistar male rats induced with Aroclor 1254. Vehicle and positive control groups were also included in this test.
No substantial increases in revertant colony numbers of any of the six tester strains were observed following treatment with the test item at any dose level, either in the presence or absence of metabolic activation. There was also no tendency of higher mutation rates with increasing concentrations in the range below the generally acknowledged border of biological relevance. Positive controls showed distinct increase of induced revertant colonies. No cytotoxicity was observed in any of the strains although it has been tested up to limit concentrations required by the OECD Guideline 471 (5000 µg/plate).
Under these test conditions, Silatrizole was found to be not mutagenic in S. typhimurium strains TA98, TA100, TA1535 and TA1537 and in Escherichia Coli stains WP2 and WP2 uvrA with and without metabolic activation, according to the criteria of the CLP regulation (EC) N°1272/2008.
This study is considered as acceptable and satisfies the requirement for reverse gene mutation endpoint.
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.