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Physical & Chemical properties

Density

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Endpoint:
relative density
Remarks:
Other density types indicated (migrated information): density
Type of information:
other: Secondary literature
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Secondary literature, handbook with reliable values.
Qualifier:
no guideline followed
Principles of method if other than guideline:
Not applicable: Handbook data
GLP compliance:
no
Type of method:
other: no data
Type:
density
Density:
8.86 g/cm³
Temp.:
20 °C
Type:
relative density
Density:
8.86
Temp.:
20 °C

According to the reference the density values can be assumed to refer to temperatures near room temperature. For this reason 20 °C was filled in as temperature.

The relative density was calculated from the the value of the handbook. The value was divided by the relative density of water (1.000).

Conclusions:
According to the reference, cobalt has a relative density of 8.86.
Endpoint:
relative density
Type of information:
other: Secondary literature
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Secondary literature, handbook with reliable values.
Qualifier:
no guideline followed
Principles of method if other than guideline:
Not applicable: Handbook data
GLP compliance:
no
Type of method:
other: no data
Type:
relative density
Density:
8.92
Temp.:
20 °C

In the reference no temperature at which the density was measured was stated. It was assumed that the relative density was measured at 20 °C.

Conclusions:
According to the reference, cobalt has a relative density of 8.92.

Description of key information

The relative density of cobalt is given as 8.86 and 8.92. The mean value of 8.89 will be used for CSA.

Key value for chemical safety assessment

Relative density at 20C:
8.89

Additional information

For the evaluation of this endpoint data from two handbooks were used. 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. Useful reference books and data compilations containing peer reviewed physico-chemical data include the Merck Index and the CRC Handbook of Chemistry and Physics.