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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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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Endpoint:
melting point/freezing point
Type of information:
other: handbook data
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: According to the REACH regulation (“ECHA, guidance on information requirements and chemical safety assessment – chapter R.7a”), it is allowed to use specific handbook data as a reliable data source.
Qualifier:
no guideline followed
Principles of method if other than guideline:
Data from the CRC handbook.
GLP compliance:
no
Type of method:
other: not applicable
Melting / freezing pt.:
825 °C
Conclusions:
According to the CRC handbook, dibismuth trioxide has a melting point of 825°C.
Executive summary:

According to the CRC handbook, dibismuth trioxide has a melting point of 825°C.

Endpoint:
melting point/freezing point
Type of information:
other: handbook data
Adequacy of study:
weight of evidence
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
other: see 'Remark'
Remarks:
According to the European Chemicals Agency, 2010 (Practical guide 2: How to report weight of evidence),values for physico-chemical properties taken from material safety data sheets (MSDSs) and all other company technical data can only be assigned a reliability rating of (4), not assignable, unless detailed information such as the experimental methodology and test substance are provided to enable the preparation of a (robust) study summary and an independent evaluation of the study reliability.
Qualifier:
no guideline followed
Principles of method if other than guideline:
Data from the MSDS
GLP compliance:
no
Type of method:
other: not applicable
Melting / freezing pt.:
820 °C
Conclusions:
According to the material safety sheet, dibismuth trioxide has a melting point of 820°C.
Executive summary:

According to the material safety sheet, dibismuth trioxide has a melting point of 820°C.

Description of key information

Dibismuth trioxide has a melting point of 825°C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
825 °C

Additional information

For the evaluation of this endpoint data from the CRC handbook and one material safety data sheet was used as a weight of evidence.

According to ECHA, guidance on information requirements and chemical safety assessment – chapter R.7a, specific handbook data for physic-chemical properties are considered to be a reliable data source. Useful reference books and data compilations containing peer reviewed physico-chemical data include the Merck Index and the CRC Handbook of Chemistry and Physics.

Concerning the available MSDS: According to the European Chemicals Agency, 2010 (Practical guide 2: How to report weight of evidence),values for physico-chemical properties taken from material safety data sheets (MSDSs) can only be assigned a reliability rating of (4), not assignable, unless detailed information such as the experimental methodology are provided to enable the preparation of a (robust) study summary.

The available values for the melting point of dibismuth trioxide are in the range of 820°C to 825°C. 825°C was entered as the key value, since the CRC handbook is the most reliable source and the aberration by the MSDS from this value is only 5°C.