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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Physical & Chemical properties


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relative density
Type of information:
not specified
Adequacy of study:
key study
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
The use of secondary sources of data is acceptable when they are based on a critical evaluation of peer-reviewed data and a consequent selection of a reliable and representative value for the property under investigation. The introduction to the CRC Handbook of Chemistry and Physics states that data for physical constants have been taken from many sources, including both compilations and the primary literature. Where conflicts were found, the value deemed most reliable was chosen. Therefore, although the method used is not known, the values presented here are acceptable as they are from a reliable secondary source of phys chem. data.
Principles of method if other than guideline:
No method specified as data was obtained from handbook.
GLP compliance:
not specified
Type of method:
other: Not specified
Key result
relative density
0.662 other: Unitless
20 °C
The relative density of 2,3-dimethylbutane is 0.6616.
Executive summary:

The relative density of 2,3-dimethylbutance (0.6616) has been taken from the CRC Handbook. No information on the primary source of this data or the methods used is available. However, this information is taken from a reliable peer reviewed handbook and so can be considered reliable and suitable for use as the key study for this endpoint.

Description of key information

The relative density of 2,3-dimethylbutane is 0.6616.

Supporting data is available for Hydrocarbons, C6, isoalkanes, <5% n-hexane and Isohexane. Based on an analogue approach, this data is read across to 2,3 -dimethylbutane.

The density ranges between 0.65 and 0.69 g/cm3 at 15°C for Hydrocarbons, C6, isoalkanes, <5% n-hexane.

Key value for chemical safety assessment

Relative density at 20C:

Additional information