Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Water solubility

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

The solubilities of butenes in water were reported to range from 222 to 263 mg/L. The data were reported for two members of the of butenes category: but-1-ene (CAS 106-98-9) and 2-methylpropene (CAS 115-11-7). Insoluble in water, miscible with ether, alcohols, hydrocarbons and sulphuric acid.

Key value for chemical safety assessment

Water solubility:
242.5 mg/L
at the temperature of:
25 °C

Additional information

The study by McAuliffe (1966) predates the implementation of GLP and standard guidelines. However, the method is described in detail and is considered appropriate for determining the solubility of a gaseous substance. The study is therefore deemed suitable as the key study for this endpoint. The solubility of butenes therefore is considered to range from 222 mg/L to 263 mg/L at 25°C. It should be noted that the solubility was measured in a closed system with an equilibrium between the vapour and water phase. This is an artificial situation and, in the environment, the observed solubility would be expected to be much less.

The solubility of 2-methylpropene is 263 mg/L at 25°C (McAuliff 1966). The water solubility of but-1-ene is 222 mg/L at 25°C (McAuliff 1966). The mean of the water solubility values for the butenes is 242.5 mg/L at 25°C and this has been used to complete the 'key value for chemical safety assessment'.