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Description of key information

The density of the substances in the category ranges from 0.423 to 0.589 g/cm3.

Key value for chemical safety assessment

Relative density at 20C:

Additional information

Data from the CRC handbook (Lide 2008) were available for the substances methane, ethane, propane, butane and isobutane. Data are also available from the Merck handbook (O’Neill 2006) for methane, ethane, propane and butane. The information is taken from reliable peer reviewed handbooks and so can be considered reliable and suitable for use for this endpoint.

The density of methane is 0.423g/cm3 at -162°C, ethane is 0.545 g/cm3 at -89˚C, propane is 0.493g/cm3 at 25°C, butane is 0.573g/cm3 at 25°C and isobutane is 0.589g/cm3 at 25°C. The mean of the density values for the category is 0.525 at 25°C and this has been used to complete the 'key value for chemical safety assessment'.