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Physical & Chemical properties

Boiling point

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Reference
Endpoint:
boiling point
Type of information:
read-across based on grouping of substances (category approach)
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Remarks:
Data from peer-reviewed handbook or collection of data.
Justification for type of information:
1. HYPOTHESIS FOR THE CATEGORY APPROACH: The hypothesis is that properties are likely to be similar or follow a similar pattern because of the presence of a common metal ion, in this case tungstate.
2. SOURCE AND TARGET CHEMICAL(S) (INCLUDING INFORMATION ON PURITY AND IMPURITIES):
Source: Tungsten Carbide
Target: RM W2C + WC
3. CATEGORY APPROACH JUSTIFICATION: See Annex 1 in CSR
4. DATA MATRIX: See Annex 1 in CSR
Reason / purpose:
read-across: supporting information
Principles of method if other than guideline:
Data in this peer-reviewed publication were taken from many sources, including both compilations and primary literature. Where conflicts were found, the value deemed most reliable were chosen for inclusion in the handbook. Reference sources were not provided for this parameter, nor was the experimental method
GLP compliance:
not specified
Key result
Boiling pt.:
6 000 °C
Atm. press.:
1 013 hPa
Remarks on result:
other: pressure not noted, assumed to be tested under standard conditions
Conclusions:
The boiling point is estimated to be 6000 deg. C based on read-across to tungsten carbide. A manufacturer's MSDS reports a boiling point of 5700 for a mixture of >70% W2C and <30% WC.
Executive summary:

Due to the similar chemical constituency and structure between the source substance (tungsten carbide) and the target substance (fused carbide), the physico-chemical properties would be expected to be the same or sufficiently similar such that application of this read-across is appropriate for this endpoint. For more details, refer to the attached read-across approach document.

Description of key information

The boiling point is estimated to be 6000 deg. C based on read-across to tungsten carbide. A manufacturer's MSDS reports a boiling point of 5700 for a mixture of >70% W2C and <30% WC.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
5 700 °C

Additional information

Due to the similar chemical constituency and structure between the source substance (tungsten carbide) and the target substance (fused carbide), the physico-chemical properties would be expected to be the same or sufficiently similar such that application of this read-across is appropriate for this endpoint. For more details, refer to the attached read-across approach document.