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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Boiling point

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boiling point
Type of information:
other: database
Adequacy of study:
key study
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Information taken from factual databases and/or handbooks.
no guideline followed
Principles of method if other than guideline:
Not applicable: Handbook and database data.
Type of method:
other: no data
Boiling pt.:
460 °C
Remarks on result:
other: Atm. pressure not stated. Assumed to apply to normal atmospheric pressure (1013 hPa)
Arsenic trioxide has a boiling point of 460°C.

Description of key information

In reliable secondary literature, the boiling point of diarsenic trioxide is stated to be 460 °C.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
460 °C

Additional information