EPA On-line Tools for Site Assessment Calculation

Previous single-temperature values were available in the Washington (1996) method calculator. These are provided for reference.

Chemical	Henry's Constant		Temperature
	Dimensionless ¹	atm-m³/mol	^oC
ethylbenzene	0.345	0.00843	25
o-xylene	0.215	0.00527	25
p-xylene	0.287	0.00701	25
m-xylene	0.282	0.00691	25
2-chloroethylvinylether	0.0103	0.000250	22.5
1,4 dichlorobenzene	0.0646	0.00158	25
trichlorofluoromethane	33.3	0.802	20
dichlorofluoromethane	16.4	0.401	25
¹This dimensionless value is based upon molar concentrations. See the unit reference for more information.

Page author: Jim Weaver, of U.S. EPA, Office of Research and Development, Athens Georgia who last modified this content on: March 10, 2004