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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

2,4,4-trimethylpentene has a Henry's Law Constant of 282971 Pa.m3/mol.

Key value for chemical safety assessment

Henry's law constant (H) (in Pa m³/mol):
282 971

Additional information

2,4,4 -trimethylpentene has a Henry's Law Constant of 282971 Pa.m3/mol. The value has been calculated based on the physico-chemical properties of the substance and the equation set out in the Guidance R16 (ECHA 2012). The result is supported by data from the QSAR estimation (US EPA 2009).

The Henry's Law Constant has been taken from a QSAR estimate. The values determined using the group and bond contribution methods are 1.34 and 0.746 atm-m3/mol respectively.