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Physical & Chemical properties

Melting point / freezing point

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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.