Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Currently viewing:

Administrative data

Link to relevant study record(s)

Referenceopen allclose all

Endpoint:
melting point/freezing point
Type of information:
other: Handbook data
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Qualifier:
no guideline followed
Principles of method if other than guideline:
Handbook data - no method specified
GLP compliance:
no
Melting / freezing pt.:
825 °C
Decomposition:
yes
Remarks:
- decomposes into CaO and CO2
Decomp. temp.:
825 °C
Remarks on result:
other: Calcium carbonate (aragonite)
Melting / freezing pt.:
1 339 °C
Decomposition:
yes
Remarks:
- decomposes into CaO and CO2
Decomp. temp.:
825 °C
Remarks on result:
other: Calcium carbonate (calcite)
Conclusions:
The melting point of calcium carbonate as aragonite is 825 °C and as calcite is 1339 °C. At about 825 °C calcium carbonate decomposes into CaO and CO2.
Endpoint:
melting point/freezing point
Type of information:
other: Handbook data
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Qualifier:
no guideline followed
Principles of method if other than guideline:
Handbook data - no method specified
GLP compliance:
no
Melting / freezing pt.:
825 °C
Decomposition:
yes
Decomp. temp.:
825 °C
Conclusions:
Calcium carbonate decomposes before melting. The decomposition temperature is 825 °C.
Endpoint:
melting point/freezing point
Type of information:
other: Handbook data
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Qualifier:
no guideline followed
Principles of method if other than guideline:
Handbook data - no method specified
GLP compliance:
no
Melting / freezing pt.:
825 °C
Remarks on result:
other: Calcium carbonate (aragonite)
Melting / freezing pt.:
1 330 °C
Remarks on result:
other: Calcium carbonate (calcite)
Conclusions:
The melting point of calcium carbonate as aragonite is 825 °C and as calcite is 1330 °C.
Endpoint:
melting point/freezing point
Type of information:
other: Handbook data
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Qualifier:
no guideline followed
Principles of method if other than guideline:
Handbook data - no method specified
GLP compliance:
no
Melting / freezing pt.:
825 °C
Atm. press.:
102.5 atm
Decomposition:
yes
Remarks:
- decomposes into CaO and CO2
Decomp. temp.:
825 °C
Remarks on result:
other: Calcium carbonate (aragonite)
Melting / freezing pt.:
1 339 °C
Atm. press.:
102.5 atm
Decomposition:
yes
Remarks:
- decomposes into CaO and CO2
Decomp. temp.:
825 °C
Remarks on result:
other: Calcium carbonate (calcite)
Conclusions:
The melting point of calcium carbonate as aragonite is 825 °C and as calcite is 1339 °C. At about 825 °C calcium carbonate decomposes into CaO and CO2.

Description of key information

Bulk calcium carbonate decomposes without melting at temperatures greater than 825 °C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
825 °C

Additional information

The value for melting point is based on a weight of evidence using data from several peer reviewed handbooks.