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Environmental fate & pathways

Henry's Law constant

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Description of key information

The measured Henry’s Law Constant, 2.82 x 10e-3 atm-m3/mol at 25 C, was taken as representative for 1,2-dichloropropane.  A value of 2.07 x 10e-3 atm-m3/mol was reported at 20 C.

Key value for chemical safety assessment

Henry's law constant (H) (in Pa m³/mol):
0.002
at the temperature of:
20 °C

Additional information

Henry’s Law constants for 1,2-dichloropropane have been measured experimentally at different temperatures by several investigators. The experimentally measured values were generally consistent, and in excellent agreement with calculated values. The measured Henry’s Law Constant, 2.82 x 10e-3 atm-m3/mol at 25 C (2.07 x 10e-3 atm-m3/mol at 20 C), was taken as representative for 1,2-dichloropropane. The magnitude of the Henry’s Law constant indicates that 1,2-dichloropropane is expected to volatilize from soil and water.