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Physical & Chemical properties

Melting point / freezing point

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Description of key information

Arsenic trioxide, in the mineral form of claudetite, is cited to have a melting point of 313°C. In the mineral form of arsenolite, the melting point is cited to be 274°C. 

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
313 °C

Additional information