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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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
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EC number: 231-157-5 | CAS number: 7440-47-3
- 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 transformation study in mammalian cells
- Remarks:
- Type of genotoxicity: genome mutation
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Acceptable publication which meets basic scientific principles; however all details of the study are not presented.
Data source
Reference
- Reference Type:
- publication
- Title:
- Welding fumes and chromium compounds in cell transformation assays.
- Author:
- Hansen, K. and R. M. Stern
- Year:
- 1 985
- Bibliographic source:
- J Appl Toxicol.5(5): 306-14.
Materials and methods
Test guideline
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- EU Method B.21 (In Vitro Mammalian Cell Transformation Test)
- Deviations:
- yes
- Remarks:
- lack of positive controls, no metabolic activation
- GLP compliance:
- not specified
- Type of assay:
- in vitro mammalian cell transformation assay
Test material
- Reference substance name:
- Chromium(III) oxide
- IUPAC Name:
- Chromium(III) oxide
- Reference substance name:
- metallic chromium
- IUPAC Name:
- metallic chromium
- Details on test material:
- Metallic chromium (Cr) ; Merck analytical grade.
Chromic oxide (Cr2O3) Merck analytical grade.
No other details given.
Constituent 1
Constituent 2
Method
Species / strain
- Species / strain / cell type:
- other: Syrian hamster BHK cells
- Details on mammalian cell type (if applicable):
- - Type and identity of media: Dulbecco's modified Eagle's medium supplemented with 20% newborn calf serum.
- Properly maintained: yes
- Periodically checked for Mycoplasma contamination: no data
- Periodically checked for karyotype stability: no data
- Periodically "cleansed" against high spontaneous background: no data - Additional strain / cell type characteristics:
- not specified
- Metabolic activation:
- without
- Test concentrations with justification for top dose:
- Metallic chromium: no concentrations given.
Cr2O3: 100, 400, 1600 µg/ml (68,5, 274, 1095 µg Cr(III)/ml). - Vehicle / solvent:
- Water
Controls
- Untreated negative controls:
- no
- Negative solvent / vehicle controls:
- yes
- Remarks:
- no details given; obviously water
- True negative controls:
- no
- Positive controls:
- no
- Positive control substance:
- no
- Details on test system and experimental conditions:
- METHOD OF APPLICATION: in medium
DURATION
- Preincubation period: cells were grown until the monolayer was approx 70% confluent
- Exposure duration: 7 h for transformation test, 8 days for toxicity test
Transformation test: After exposure cells were plated in 0.3% agar solution to allow transformed cells to grow into large (>400 µm) colonies during 3 weeks.
SELECTION AGENT (mutation assays):
SPINDLE INHIBITOR (cytogenetic assays):
STAIN (toxicity test): crystal violet
NUMBER OF REPLICATIONS: no data
NUMBER OF CELLS EVALUATED: 2*5*10(exp-5) (minus 2*1250 removed for tox determination). BHK cells were evaluated using a haemocytometer.
DETERMINATION OF CYTOTOXICITY
- Method: relative total growth
OTHER EXAMINATIONS:
- Determination of polyploidy:
- Determination of endoreplication:
- Other:
OTHER: - Evaluation criteria:
- - Number of transformations per 500000 cells / per 500000 survivors (absolute and specific transformation frequency)
- relative survival - Statistics:
- No data
Results and discussion
Test resultsopen allclose all
- Species / strain:
- other: Syrian hamster BHK cells
- Metabolic activation:
- without
- Genotoxicity:
- negative
- Cytotoxicity / choice of top concentrations:
- no cytotoxicity
- Vehicle controls validity:
- valid
- Untreated negative controls validity:
- not specified
- Positive controls validity:
- not examined
- Species / strain:
- other: Syrian hamster BHK cells
- Metabolic activation:
- without
- Genotoxicity:
- negative
- Cytotoxicity / choice of top concentrations:
- cytotoxicity
- Vehicle controls validity:
- valid
- Untreated negative controls validity:
- not specified
- Positive controls validity:
- not examined
- Additional information on results:
- No transforming effects of metal chromium or Cr2O3 on BHK cells (no values presented)
ADDITIONAL INFORMATION ON CYTOTOXICITY: slight toxic effects of Cr2O3; however the authors concluded that it may be related to contamination. No toxic effects of Cr metal. - Remarks on result:
- other: strain/cell type: BHK, Cr metal exposure
- Remarks:
- Migrated from field 'Test system'.
Applicant's summary and conclusion
- Conclusions:
- Interpretation of results (migrated information):
negative Cr metal
negative Cr2O3
Metallic chromium and Cr2O3 did not have a transforming effect on cells. Cr metal was not toxic. Cr2O3 showed some signs of toxicity, however the authors mentioned that it may be due to contamination. - Executive summary:
The genotoxic potential of chromium metal and chromium(III) oxide was tested in Syrian hamster BHK cells, using an in vitro mammalian cell transformation test. Metallic chromium and Cr2O3 did not have a transforming effect on cells. Cr metal was not toxic. Cr2O3 showed some signs of toxicity, however the authors mentioned that it may be due to contamination. It should be noted that all details were not presented in the publication, for example the test concentrations of chromium metal remained unclear.
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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