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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Henry's Law constant

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Description of key information

The Henry's Law Constant of 2-methylbut-2-ene is listed in the OECD SIDS document as 11145 Pa.m3/mol.

Key value for chemical safety assessment

Henry's law constant (H) (in Pa m³/mol):
11 145

Additional information

2 -methylbut-2 -ene has a Henry's Law Constant of 11145 Pa.m3/mol. The value has been taken from a regulatory review document, the OECD SIDS document (OECD 2004). This is supported by data calculated based on the physico-chemical properties of the substance and the equation set out in the Guidance R16 (ECHA 2012) and data from the QSAR estimation (US EPA 2009).