Registration Dossier
Registration Dossier
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EC number: 234-842-7 | CAS number: 12036-22-5
Density
Administrative data
Link to relevant study record(s)
- Endpoint:
- relative density
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Remarks:
- Guideline study (EU method A.3).
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.3 (Relative Density)
- Deviations:
- yes
- Remarks:
- The test was conducted at 25 °C instead of 20 °C as indicated in the guideline EU A.3. However, as the substance is a solid this deviation is considered to be negligible.
- GLP compliance:
- no
- Type of method:
- pycnometer method
- Type:
- relative density
- Density:
- 10 716 kg/m³
- Temp.:
- 25 °C
- Conclusions:
- The density of the test substance tungsten dioxide (WO2) is 10716 kg/m³.
- Executive summary:
The density of tungsten dioxide (WO2) at 25 °C was determined according to EU method A.3 (pycnometer method). The relative denisty of WO2 was determined from the mean of five individual measurements. The density of the test substance WO2 is 10716 kg/m³.
- Endpoint:
- density
- Remarks:
- density
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Study period:
- no data
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Valid with restriction. Data from handbook.
- Principles of method if other than guideline:
- No principles available. Data from handbook.
- GLP compliance:
- not specified
- Type of method:
- other: handbook data
- Type:
- density
- Density:
- 10.8 g/cm³
- Temp.:
- 20 °C
- Conclusions:
- The density of tungsten (IV) oxide at room temperature is 10.8 g/cm³.
- Executive summary:
According the CRC Handbook for Chemistry and Physics the density of tungsten (IV) oxide at room temperature is 10.8 g/cm³.
Referenceopen allclose all
Results table:
| Measurement No. | Density [g/cm³] |
| 1 | 10.7160 |
| 2 | 10.7148 |
| 3 | 10.7186 |
| 4 | 10.7161 |
| 5 | 10.7150 |
| mean | 10.7161 |
Description of key information
The density of tungsten dioxide is 10.7161 g/cm³.
Key value for chemical safety assessment
- Relative density at 20C:
- 10.716
Additional information
According the CRC Handbook for Chemistry and Physics (92nd edition) the density of tungsten (IV) oxide at room temperature is 10.8 g/cm³.
The density of tungsten dioxide (WO2) at 25 °C was determined according to EU method A.3 (pycnometer method). The relative density of WO2 was determined from the mean of five individual measurements. The density of the test substance WO2 is 10716 kg/m³. The result of this study was chosen as the key study in the chemical safety assessment due to the higher reliability (Klimisch 1) of the test result compared to the handbook data (Klimisch 2).
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.
