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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Water solubility

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Administrative data

Link to relevant study record(s)

Description of key information

The water solubility of 2-methylbut-2-ene is 193 mg/L at 25⁰C. This classes the substance as moderately soluble (100-1000 mg/L). This value can be used as read-across for isoamylene (2-methylbutene, CAS 26760-64-5).

Key value for chemical safety assessment

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

Additional information

The key study, Hine et. al. (1982) was given a reliability rating of 2, because the data are not from the primary source, but rather from reviewed, acceptable data. Used as the key study for OECD SIDS (2005) for513-35-9 and given a reliability 2. The water solubility of 2-methylbut-2-ene is 193 mg/L at 25°C. This classes the substance as moderately soluble (100-1000 mg/L). Since isoamylene (2-methylbutene,26760-64-5) is a mixture of the two isomers, 2-methylbut-2-ene (513-35-9) and 2-methylbut-1-ene (563-46-2) and in the absence of any reliable data for isoamylene then 2-methylbut-2-ene is considered a suitable substance for read-across.