Registration Dossier
Registration Dossier
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EC number: 240-986-1 | CAS number: 16924-00-8
Density
Administrative data
Link to relevant study record(s)
Description of key information
The density of the test material was reported to be 4.1 g/cm³. This is based on a weight of evidence approach using two peer reviewed handbooks and two internal company reports.
Key value for chemical safety assessment
- Relative density at 20C:
- 4.1
Additional information
The density of the test material has been addressed by providing data on a weight of evidence basis.
A company report is provided (2012) that was assigned a reliability score of 2, using the principles set out in Klimisch (1997). The density of the test material was determined using gas pycnometry in accordance with the standardised guideline EU Method A.3. Under the conditions of this study, the density was determined to be 4.098 g/cm³.
Two handbooks (Clayton & Clayton 1981, and Lide &Haynes, 2010) have provided physico-chemical data which has been cited directly from the literature. These texts have been peer reviewed and consequentially have been assigned a reliability score of 2, using the principles set out in Klimisch (1997). Both texts report the density to be 5.24 g/cm³.
The remaining reference is an internal company report which has been assigned a reliability score of 4, according to Klimisch (1997), the data have been reported without information on the methods adopted and it is therefore impossible to assess the accuracy of the data provided. The report defines the density of the test material as 4.1 g/cm³.
Based on the available data and its respective reliability the density is concluded to be 4.1 g/cm³. It was deemed more appropriate to use the most recent company report, assigned a reliability score of 2, than the handbook data. In addition, one of the supporting studies reported an identical value, lending weight to this being correct.
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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