Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
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EC number: 238-877-9 | CAS number: 14807-96-6
Melting point / freezing point
Administrative data
Link to relevant study record(s)
- Endpoint:
- melting point/freezing point
- 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
- Justification for type of information:
- According to the REACH regulation (“ECHA, guidance on information requirements and chemical safety assessment – chapter R.7a”), it is allowed to use handbook data as a reliable data source.
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- handbook data
- GLP compliance:
- not specified
- Type of method:
- other: handbook data
- Melting / freezing pt.:
- > 900 - <= 1 000 °C
- Remarks on result:
- other: Above 900°C, talc progressively loses its hydroxyl groups
- Melting / freezing pt.:
- 1 500 °C
- Remarks on result:
- other: Above 1050°C, talc re-crystallises into different forms of enstatite (anhydrous magnesium silicate). Talc's melting point is at 1500°C.
- Conclusions:
- Above 900°C, talc progressively loses its hydroxyl groups .Above 1050°C, talc re-crystallises into different forms of enstatite (anhydrous magnesium silicate). Talc's melting point is at 1500°C. Many references to the melting point in published literature.
Reference
Description of key information
Above 900°C, talc progressively loses its hydroxyl groups .Above 1050°C, talc re-crystallises into different forms of enstatite (anhydrous magnesium silicate). Talc's melting point is at 1500°C.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 1 500 °C
Additional information
Above 900°C, talc progressively loses its hydroxyl groups .Above 1050°C, talc re-crystallises into different forms of enstatite (anhydrous magnesium silicate). Talc's melting point is at 1500°C.
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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