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EC number: 807-821-0 | 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 vivo
Administrative data
- Endpoint:
- in vivo mammalian somatic cell study: cytogenicity / erythrocyte micronucleus
- Remarks:
- Type of genotoxicity: genome mutation
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 27 January to 10 February 2014
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Study performed in accordance with OECD guidelines in compliance with GLP.
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 474 (Mammalian Erythrocyte Micronucleus Test)
- GLP compliance:
- yes
- Type of assay:
- micronucleus assay
Test material
Constituent 1
Test animals
- Species:
- mouse
- Strain:
- Crj: CD(SD)
- Sex:
- male/female
Administration / exposure
- Route of administration:
- oral: gavage
- Vehicle:
- Distilled waterThe test substance was dissolved at 200 mg/mL in distilled water. This solution was considered to be stable from the facts on account of neither change in color, exothermic reaction nor gas generation at room temperature until 4 hours after preparation. Therefore, distilled water was selected as a vehicle.
- Duration of treatment / exposure:
- Administration was repeated twice with a 24-hour interval by the oral gavage which is generally used for the micronucleus test Administration was carried out at 10 mL/kg based on the body weight at the administration day
Doses / concentrations
- Remarks:
- Doses / Concentrations:2000, 1000, 500, 250, 125 and 62.5 mg/kg/dayBasis:actual ingested
- No. of animals per sex per dose:
- Three male and female mice were used.
- Control animals:
- yes, concurrent vehicle
- Positive control(s):
- In the positive control group, MMC was intraperitoneally administered at 2 mg/kg/day based on the historical data in the testing facility. Six male mice were used in each control group because it was judged that there was no difference in MTD and toxicity of the test substance between sexes in the preliminary test. Specimens were prepared for all surviving animals at the timing of preparation of specimens and 5 animals of the smaller animal number in each group were used for the evaluation.
Examinations
- Tissues and cell types examined:
- Animals were observed frequently until 1 hour after each administration. In addition, the animals were observed at 1 day after each administration. In the positive control group, observation of clinical signs was not carried out at the first administration day of the test substance.Body weights were measured before the first and second administrations and at 1 day after the second administration using an electronic balance (Sartorius).Animals were euthanized by a cervical dislocation. The femur was removed and the bone marrow cells were collected with approximately 0.8 mL of a heat-inactived fetal bovine serum into a centrifuge tube, and the tube was centrifuged at 1000 rpm (210xg) for 5 minutes. A small amount of the cell suspension was smeared on a glass slide. The smears were fully air-dried and fixed with methanol. Then, the smears were stained with 3 vo l% Giemsa solution prepared with Sorensen buffer, pH 6.8 and treated with 0.004 w/v% citrate aqueous solution. For all surviving animals at the timing of preparation of specimens, two specimens were prepared per animal.
Results and discussion
Test results
- Sex:
- male
- Genotoxicity:
- negative
- Toxicity:
- no effects
- Vehicle controls validity:
- valid
- Positive controls validity:
- valid
Any other information on results incl. tables
At specimen observation, there were 3 doses that PCE/TE of the test substance group was 20% or more compared to that of the negative control group. Therefore, it was confirmed that the test was conducted appropriately.
In the test substance group, the MNPCE/PCE at all doses for observation did not show the significant differences compared to the negative control group. Therefore, it was evaluated that the frequencies of micronucleated polychromatic erythrocytes were not increased by administering the test substance.
In the PCE/TE, since no statistically significant differences were observed in any doses of the test substance group compared to the negative control group, the exposure of the test substance to bone marrow cells was not proved. However, the potential to induce the micronuclei was evaluated at the doses up to 2000mg/kg/day described as the maximum dose in the case of no toxicity on the guideline. Therefore, it was considered that the potential to induce the micronuclei of the test substance could be evaluated adequately in this study.Applicant's summary and conclusion
- Conclusions:
- Interpretation of results (migrated information): negativeThe substance did not induce the micronuclei under the conditions of the test
- Executive summary:
The test substance was administered to 7 weeks old Crlj:CD1 (ICR) male mice twice at a 24 -hour interval by gavage to investigate the ability of the substance to induce micronuclei according to the OECD 474 test guideline in compliance with GLP.
The preliminary test was conducted at 62.5 -2000 mg/kg/day of the test substance group in male and female, and it was estimated that each maximum tolerance dose (MTD) determined by death of animals was 2000 mg/kg/day or more in male and female. Therefore, the highest dose was selected to be 2000 mg/kg/day, and 2 lower doses of 1000 and 500 mg/kg/day were selected based on a geometric progression of 2 for the micronucleus test. It was found that there was no difference in MTD and toxicity between male and female. Therefore, the only male mice were used for the micronucleus test. The vehicle, distilled water, was administered at 10mL/kg twice at a 24 -hour interval by gavage as the negative control. Mitomycin C was administered intraperitoneally at 2 mg/kg/day once as the positive control.
In the micronucleus test, no animals died at any dose groups until 24 hours after the second administration, therefore, the doses of observation of specimens were selected at setting three doses, 2000, 1000 and 500 mg/kg/day. The frequencies of the micronucleated polychromatic erythrocytes to polychromatic erythrocytes (MNPCE/PCE) in bone marrow cells and the ratio of PCE to total erythrocytes (PCE/TE) were examined.
As a result of observation, the MNPCE/PCE in all doses of the test substance group did not show the significant differences compared to the negative control group. Therefore, it was evaluated that the frequencies of micronucleated polychromatic erythrocytes were not increased by administering the test substance.
Consequently, it was concluded that the substance did not induce the micronuclei in mice bone marrow cells under the present test conditions.
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.
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