Registration Dossier
Registration Dossier
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EC number: 944-886-5 | CAS number: -
Melting point / freezing point
Administrative data
Link to relevant study record(s)
Description of key information
Thermically stable, melting 1608 -1670 °C
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 1 608 °C
Additional information
No data is available for the evaluation of the melting point of the substance. No prediction of the melting point is allowed by the use of EpiSuite tool as inorganic compounds are outside the applicability domain of the model.
The thermal stability of similar substances were evaluated in different studies. The substances appear to be stable in temperatures up to 1200 °C while a study on synthetic apatites showed a melting range 1608 - 1670 °C. The thermal behaviour of the substances is mainly determined by the stoichiometry (Ca/P ratio and structural substitutions) and the gas composition during heating. Thermal stability is lowered the most by a substitution of calcium and phosphate, leading to loss in phase stability at temperatures less than 900 °C. The anions in the hexagonal axis, OH in Hydroxyapatite, F in Fluoroapatite and Cl in Cloroapatite are the last to leave upon heating, and prevention of the loss of these groups ensures high temperature stability.
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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