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Environmental fate & pathways

Henry's Law constant

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Description of key information

Henry's Law constant was determined using a batch air stripping method. HLC values were measured for both of the (1-methylethyl)-1,1'-biphenyl isomers present in the test substance.

Key value for chemical safety assessment

Henry's law constant (H) (in Pa m³/mol):
173.3

Additional information

Test substance consisted of two isomers of isopropylbiphenyl. For both isomers, HLC values could be determined. Measurements were carried out under ambient conditions. Henry's law constants of 3-isopropylbiphenyl and 4-isopropylbiphenyl were 0.07 and 0.096 (dimensionless), respectively. Conversion resulted in respective values of either 1.71 E-03 and 2.35 E-03 atm m³/mol or 173.3 and 238.1 Pa m³/mol. Result for 3-isopropylbiphenyl is taken as key value as this isomer is the main component in the Applicant´s product, isopropylbiphenyl (mixture of isomers).