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EC number: 217-421-2 | CAS number: 1843-05-6
- 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 mammalian cells
- Remarks:
- Type of genotoxicity: gene mutation
- Type of information:
- migrated information: read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- key study
- Study period:
- 1980 - 1990
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- comparable to guideline study with acceptable restrictions
Data source
Reference
- Reference Type:
- publication
- Title:
- A Compilation of Two Decades of Mutagenicity Test Results with the Ames Salmonella typhimurium and L5178Y Mouse Lymphoma Cell Mutation Assay
- Author:
- Seifried HE, Seifried RM, Clarke JJ, Junghans TB and San RHC
- Year:
- 2 006
- Bibliographic source:
- Chem. Res. Toxicol. 19: 627-644
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 476 (In Vitro Mammalian Cell Gene Mutation Test)
- GLP compliance:
- not specified
- Type of assay:
- mammalian cell gene mutation assay
Test material
- Reference substance name:
- Oxybenzone
- EC Number:
- 205-031-5
- EC Name:
- Oxybenzone
- Cas Number:
- 131-57-7
- Molecular formula:
- C14H12O3
- IUPAC Name:
- (2-hydroxy-4-methoxyphenyl)(phenyl)methanone
- Details on test material:
- Aquired from NCI contractors and analysed for purity at Midwest Research Institute (USA)
appropriate storage condiations as indicated from supplier
Constituent 1
Method
- Target gene:
- thymidine kinase gene
Species / strain
- Species / strain / cell type:
- mouse lymphoma L5178Y cells
- Details on mammalian cell type (if applicable):
- - Type and identity of media: Fischer's medium for leukemic cells of mice (Gibco, Grand Island, NY (USA) supplemented with 10% Horse serum and 0.02% pluronic F-60 (BASF Wyandotte Crop)
- Properly maintained: yes
- Periodically checked for Mycoplasma contamination: yes
- Periodically checked for karyotype stability: no data, new cultures were started from cryopreserved cultures every three months
Cells were origally obtained from Dr. Donald Clive, Buroughs Wellcome Co. (Research Triangle Park, USA) - Additional strain / cell type characteristics:
- not applicable
- Metabolic activation:
- with and without
- Metabolic activation system:
- liver S9 prepared from Arochlor 1254-induced male Sprague-Dawley rats
- Test concentrations with justification for top dose:
- 22, 29, 37, 45 and 52 microgramms/mL (without S9)
18, 24, 31, 37, 44 and 50 microgramms/mL (with S9) - Vehicle / solvent:
- DMSO
Controlsopen allclose all
- Untreated negative controls:
- no
- Negative solvent / vehicle controls:
- yes
- True negative controls:
- no
- Positive controls:
- yes
- Positive control substance:
- ethylmethanesulphonate
- Remarks:
- Migrated to IUCLID6: 4.7 microM without metabolic activation
- Positive control substance:
- 3-methylcholanthrene
- Remarks:
- Migrated to IUCLID6: 18.6 microM, with metabolic activation
- Details on test system and experimental conditions:
- Cells at a concentration of 6 x 10exp5/mL (6 x 10 exp6 cells total) were exposed for 4 h to a range of concentrations
from 0.0005 to 10000 microg/mL. The cells were then washed, resuspended in growth medium, and incubated at 37 ( 1 °C for 48 h. The rate of cell growth was determined for each of the treated cultures and compared to the rate of growth of the solvent controls.
The doses of chemical selected for testing were within the range yielding approximately 0-90% cytotoxicity.
The mutagenicity assay was performed according to the procedure described by Clive and Spector in 1975 (Mutat. Res. 59: 61 - 180).
A total of 1.2 x 10exp7 cells in duplicate cultures were exposed to the test chemical, positive control, and solvent control for 4 h at 37 ( 1 °C, washed twice with growth medium, and maintained at 37 ( 1 °C for 48 h in log-phase growth to allow recovery and mutant expression. Cells in the cultures were adjusted to 3 x 10exp5/mL at 24 h intervals. They were then cloned (1 x 10exp6 cells/plate for mutant selection and 200 cells/plate for viable count determinations) in soft agar medium containing Fischer’s medium, 20% horse serum, 2 mM sodium pyruvate, 0.02% pluronic F-68, and 0. 23% granulated agar (BBL, Inc., Cockeysville, MD). Resistance to trifluorothymidine (TFT) was determined by adding TFT (final concentration, 3 microg/mL) to the cloning medium for mutant selection. The 100x stock solution of TFT in saline was stored at -70 °C and was thawed immediately before use. Plates were incubated at 37°C in 5% CO2 in air for 10-12 days and then counted with an Artek automated colony counter (Artek 982, DynaTech) or ProtoCol colony counter (Synbiosis, Frederick, MD). Only colonies larger than ca. 0.2 mm in diameter were counted. Mutant frequencies were expressed as
mutants per 10exp6 surviving cells.
The size of mutant mouse lymphoma colonies was also determined using an Artek 982 colony counter/sizer or the ProtoCol colony counter. An internal discriminator was set to step sequentially to exclude increasingly larger colonies in approximate increments of 0.1 mm in colony diameter. The size range used was from ca. 0.2 to 1.1 mm. - Evaluation criteria:
- Results were interpreted using a doubling of the mutant frequency over the concurrent solvent-treated control value as an indication of a positive effect, together with evidence of a dose-related increase. Only doses yielding total growth values of 10% were used in the analysis of induced mutant frequency. Doses yielding less than 10% total growth were used in determining dose response.
- Statistics:
- none
Results and discussion
Test resultsopen allclose all
- Species / strain:
- mouse lymphoma L5178Y cells
- Metabolic activation:
- without
- Genotoxicity:
- negative
- Cytotoxicity / choice of top concentrations:
- cytotoxicity
- Vehicle controls validity:
- valid
- Untreated negative controls validity:
- not examined
- Positive controls validity:
- valid
- Species / strain:
- mouse lymphoma L5178Y cells
- Metabolic activation:
- with
- Genotoxicity:
- ambiguous
- Remarks:
- A less than 3 fold increase occured at highly toxic concentrations.
- Cytotoxicity / choice of top concentrations:
- cytotoxicity
- Vehicle controls validity:
- valid
- Untreated negative controls validity:
- not examined
- Positive controls validity:
- valid
Any other information on results incl. tables
VC = Viable counts (cloning efficiency)
TFT = Counts after TFT-selection
RTG = Relative total growth
Non-Activated Cultures | S9-Activated Cultures | ||||||||
Dose (ug/mL) | Average TFT | Average VC | Mut Freq | RTG | Dose (ug/mL) | Average TFT | Average VC | Mut Freq | RTG |
22 | 33 | 190 | 0.4 | 78 | 18 | 36 | 141 | 0.5 | 65 |
28 | 167 | 0.3 | 70 | 30 | 142 | 0.4 | 67 | ||
29 | 29 | 124 | 0.4 | 55 | 24 | 55 | 179 | 0.6 | 49 |
36 | 172 | 0.4 | 64 | 39 | 175 | 0.4 | 55 | ||
37 | 35 | 160 | 0.4 | 41 | 31 | 63 | 152 | 0.8 | 22 |
47 | 172 | 0.6 | 41 | 66 | 157 | 0.8 | 25 | ||
45 | 51 | 191 | 0.6 | 30 | 37 | 73 | 140 | 1 | 15 |
40 | 159 | 0.5 | 37 | 58 | 173 | 0.7 | 18 | ||
52 | 53 | 151 | 0.7 | 17 | 44 | 89 | 145 | 1.2 | 8 |
64 | 130 | 0.9 | 14 | 91 | 139 | 1.3 | 9 | ||
Solvent | 29 | 179 | 0.3 | 50 | 87 | 143 | 1.2 | 6 | |
Positive | 33 | 79 | 8.4 | 23 | 101 | 155 | 1.3 | 8 | |
Solvent | 36 | 159 | 0.5 | ||||||
Positive | 107 | 130 | 1.7 | 78 |
Applicant's summary and conclusion
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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