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EC number: 254-413-8 | CAS number: 39318-18-8
- 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

Density
Administrative data
Link to relevant study record(s)
- Endpoint:
- density, other
- Remarks:
- Density types indicated (migrated information): other: density (WO3); other: density (WO2.98); other: density (WO2.81); other: density (WO2.66); other: density (WO2.51)
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- data from handbook or collection of data
- Remarks:
- Well documented study with density examination conducted with sound scientific methodology. However, purpose of study went beyond examination of physical characteristics and few details were provided regarding density determination.
- Reason / purpose for cross-reference:
- reference to same study
- Principles of method if other than guideline:
- Density was determined via helium pycnometry.
- GLP compliance:
- not specified
- Type of method:
- pycnometer method
- Key result
- Type:
- density
- Remarks:
- density (WO3)
- Density:
- > 7.19 - < 7.21 g/cm³
- Temp.:
- 23 °C
- Key result
- Type:
- density
- Remarks:
- density (WO2.98)
- Density:
- > 6.98 - < 7.02 g/cm³
- Temp.:
- 23 °C
- Key result
- Type:
- density
- Remarks:
- density (WO2.81)
- Density:
- 7.1 g/cm³
- Temp.:
- 23 °C
- Key result
- Type:
- density
- Remarks:
- density (WO2.66)
- Density:
- > 8.17 - < 8.23 g/cm³
- Temp.:
- 23 °C
- Key result
- Type:
- density
- Remarks:
- density (WO2.51)
- Density:
- > 7.65 - < 7.75 g/cm³
- Temp.:
- 23 °C
- Conclusions:
- Density for WO3, WO2.98, WO2.81, WO2.66 and WO2.51 were approximately 7.2, 7.0, 7.1, 8.2 and 7.7 g/cm^3, respectively.
- Endpoint:
- density, other
- Remarks:
- Density types indicated (migrated information): density; other: measured density
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- data from handbook or collection of data
- Remarks:
- Data from peer-reviewed handbook or collection of data.
- Reason / purpose for cross-reference:
- reference to same study
- Principles of method if other than guideline:
- Data in this peer-reviewed publication were taken from many sources, including both compilations and primary literature. Where conflicts were found, the value deemed most reliable was chosen for inclusion in the handbook. Reference sources were not provided for this parameter, nor was the experimental method.
- GLP compliance:
- not specified
- Type of method:
- other: x-ray
- Key result
- Type:
- density
- Density:
- 7.72 - 7.99 g/cm³
- Key result
- Type:
- density
- Density:
- 7.78 g/cm³
- Conclusions:
- Density = 7.724-7.989 g/cm³ (measured), 7.78 g/cm³ (X-ray); (Relative density = 7724-7989)
- Endpoint:
- density, other
- Remarks:
- Density types indicated (migrated information): other: density (x-ray); other: density (measured)
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- data from handbook or collection of data
- Remarks:
- Data from peer-reviewed handbook or collection of data.
- Reason / purpose for cross-reference:
- reference to same study
- Principles of method if other than guideline:
- Data in this peer-reviewed publication were taken from many sources, including both compilations and primary literature. Where conflicts were found, the value deemed most reliable was chosen for inclusion in the handbook. Reference sources were not provided for this parameter, nor was the experimental method.
- GLP compliance:
- not specified
- Type of method:
- other: x-ray
- Key result
- Type:
- density
- Density:
- 7.16 g/cm³
- Temp.:
- 23 °C
- Key result
- Type:
- density
- Density:
- 7.15 g/cm³
- Temp.:
- 23 °C
Referenceopen allclose all
Assumed to be conducted at room temperature.
Testing assumed to be conducted at room temperature as no data on temperature of test conditions was provided.
Description of key information
Densities for WO3, WO2.98, WO2.81 were approximately 7.2, 7.0 and 7.1 g/cm³, respectively. Densities of other tungsten oxide forms were in the same range.
Key value for chemical safety assessment
- Relative density at 20C:
- 7
Additional information
Due to the similar chemical constituency and structure, the physico-chemical properties would be expected to be the same or sufficiently similar such that application of this read-across is appropriate for this endpoint. For more details, refer to the read-across category approach description in the Category section of this IUCLID submission or Annex 3 of the CSR.
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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