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Physical & Chemical properties

Melting point / freezing point

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Description of key information

Reaction mass of cerium dioxide and lanthanum oxide and lanthanum fluoride presents a melting point superior to 500 °C.
Data on constituents:
CeO2: > 400°C,
La2O3: > 400°C,
LaF3: 1427°C.

Key value for chemical safety assessment

Additional information

A GLP-compliant study, scored as Klimisch 1 and flagged as a key study, is available on the reaction mass; giving a melting point value superior to 500°C (Demangel, 2010).

Experimental data, scored as Klimisch 2 (Weissenfeld, 2006a, b), are also available on two of the constituents (i.e. cerium dioxide and lanthanum oxide); giving high melting point values too. Such an observation is consistently reported in various bibliographical sources (reliability 2 or 4) dealing with the three constituents.

All these data on the three constituents were thus selected as supporting studies.