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Physical & Chemical properties

Melting point / freezing point

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melting point/freezing point
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.
Type of method:
other: Not specified
Key result
Melting / freezing pt.:
-99 °C
Atm. press.:
760 mm Hg
Remarks on result:
other: Standard atmospheric pressure assumed
The melting point of 2,2-dimethylbutane is reported to be -99 °C
Executive summary:

The melting point of 2,2-dimethylbutane is reported to be -99 °C. 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 reported melting point of 2,2 -dimethylbutane is -99 °C.

Based on an analogue approach, supporting data are available and read-across to Hydrocarbons, C6, isoalkanes,  <5% n-hexane. The pour point for Hydrocarbons, C6, isoalkanes, <5% n-hexane  is <-20°C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-99 °C

Additional information