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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

The melting point of Ditantalum pentaoxide was reported to be 1875 ºC according to the CRC Handbook of Chemistry and Physics 92nd Edition (2011 -2012).

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
1 875 °C

Additional information

The melting point of Ditantalum pentaoxide was reported to be 1875 ºC according to the CRC Handbook of Chemistry and Physics 92nd Edition (2011 -2012). The handbook has been assigned a reliability score of 2 using the principles for assessing data quality as set out in Klimisch (1997).

Three additional handbooks have been used as supporting studies for this endpoint. Kirk (1997), Lide (2010) and Clayton (1981) have recorded the melting point of Ditantalum pentaoxide in peer reviewed handbook and the data has been cited as found in the literature. The values provide sufficient consistency to act as supporting studies.