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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.

Diss Factsheets

Physical & Chemical properties

Melting point / freezing point

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Administrative data

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Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
weight of evidence
Study period:
Not reported
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Although sufficient experimental details are not provided, the reference is a peer reviewed handbook and is considered reliable with restrictions
Qualifier:
no guideline followed
Principles of method if other than guideline:
Details of the guideline followed to determine the experimental result are not provided.
GLP compliance:
not specified
Type of method:
other: No information available
Melting / freezing pt.:
2 054 °C
Remarks on result:
other: Alpha form
Melting / freezing pt.:
1 200 °C
Remarks on result:
other: trans to corundum - gamma form of aluminium oxide
Executive summary:

The melting point of aluminium oxide is 2054°C (alpha form)

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
weight of evidence
Study period:
Not reported
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Although sufficient experimental details are not provided, the reference is a peer reviewed handbook and is considered reliable with restrictions
Qualifier:
no guideline followed
Principles of method if other than guideline:
Details of the guideline followed to determine the experimental result are not provided.
GLP compliance:
not specified
Type of method:
other: not stated
Melting / freezing pt.:
2 050 °C
Executive summary:

The boiling point of aluminium oxide is 2050°C

Description of key information

A weight-of-evidence approach was used to address this endpoint. Values were obtained from six separate sources and ranged from approximately 2000 °C to 2072 °C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
2 000 °C

Additional information

All available data sources agree that the melting point of aluminum oxide is approximately 2000 °C.