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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Link to relevant study record(s)

Description of key information

ZnO is very stable. No melting occurs. No exothermic or endothermic peaks are observed . No oxidation or decomposition was observed in Outotec experiment.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
1 975 °C

Additional information

ZnO has a melting point around 1975°C whatever the form (bulk or nano)