Registration Dossier
Registration Dossier
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EC number: 231-166-4 | CAS number: 7440-58-6
Density
Administrative data
Link to relevant study record(s)
Description of key information
Several independent sources of information indicate that the relative density of hafnium is included in a range of 13 – 13,31
A value of d = 13.31 will be considered in the registration dossier (peer-reviewed data)
Key value for chemical safety assessment
- Relative density at 20C:
- 13.31
Additional information
Several independent sources of information indicate that the relative density is included in a range of 13.01 – 13.31
The difference in results are assumed to be caused by the difficulty tot prepare Hf samples of high purity. Indeed, studies on the influence of zirconium concentration on Hf density show that this latter decrease by 1% when [Zr] is 1% w/w.
Although only one peer-reviewed data is available it can be safely concluded that the density of Hafnium is between 13.01 and 13.31. A value of d = 13.31 will be considered in the registration dossier (peer-reviewed data)
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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