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Physical & Chemical properties

Density

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Endpoint:
density
Remarks:
density
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:
secondary literature
Remarks:
Only secondary source reviewed.
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: Fused tungsten carbide
3. CATEGORY APPROACH JUSTIFICATION: See Annex 3 in CSR
4. DATA MATRIX: See Annex 3 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 was chosen for inclusion in the handbook. Reference sources were not provided for this parameter, nor was the experimental method.
GLP compliance:
not specified
Type of method:
other: no data provided on methodology used
Key result
Type:
density
Density:
15.7 g/cm³
Temp.:
23 °C
Remarks on result:
other: Temperature not noted, assumed to be conducted under standard conditions.
Conclusions:
The bulk density of fused tungsten carbide was calculated based on the typical composition ranges of W2C and WC, as no data was available on the substance itself. The bulk density of fused tungsten carbide is estimated to be in the range of 15.91-16.88 g/cm3.
Executive summary:

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

Endpoint:
density
Remarks:
density
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: Fused tungsten carbide
3. CATEGORY APPROACH JUSTIFICATION: See Annex 3 in CSR
4. DATA MATRIX: See Annex 3 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
Type of method:
other: no data provided on methodology used
Key result
Type:
density
Density:
15.63 g/cm³
Temp.:
23 °C
Remarks on result:
other: Temperature not noted, assumed to be performed under standard conditions
Conclusions:
The bulk density of fused tungsten carbide was calculated based on the typical composition ranges of W2C and WC, as no data was available on the substance itself. The bulk density of fused tungsten carbide is estimated to be in the range of 15.91-16.88 g/cm3.
Executive summary:

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

Endpoint:
density
Remarks:
density
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: Fused tungsten carbide
3. CATEGORY APPROACH JUSTIFICATION: See Annex 3 in CSR
4. DATA MATRIX: See Annex 3 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
Type of method:
other: no methodology noted
Key result
Type:
density
Density:
15.63 g/cm³
Temp.:
15 °C
Conclusions:
The bulk density of fused tungsten carbide was calculated based on the typical composition ranges of W2C and WC, as no data was available on the substance itself. The bulk density of fused tungsten carbide is estimated to be in the range of 15.91-16.88 g/cm3.
Executive summary:

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

Description of key information

The bulk density of fused tungsten carbide was calculated based on the typical composition ranges of ditungsten carbide and tungsten carbide, as no data was available on the substance itself. The bulk density of fused tungsten carbide is estimated to be in the range of 15.91-16.88 g/cm3.

Key value for chemical safety assessment

Relative density at 20C:
15.91

Additional information

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