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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Density

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Endpoint:
density, other
Remarks:
density and relative density
Type of information:
other: handbook data
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
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
Remarks on result:
other: relative density: 8.86

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:
density, other
Remarks:
density and relative density
Type of information:
other: handbook data
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Qualifier:
no guideline followed
Principles of method if other than guideline:
Not applicable: Handbook data
GLP compliance:
no
Type of method:
other: no specified
Type:
density
Density:
8.92 g/cm³
Temp.:
20 °C
Remarks on result:
other: relative density: 8.92

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.