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Environmental fate & pathways

Henry's Law constant

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Description of key information

Henry law constant is 7.5 * 10-4 Pa m3/mol calculated from the ratio of the vapour pressure and CMC.

Key value for chemical safety assessment

Henry's law constant (H) (in Pa m³/mol):
0.001
at the temperature of:
23 °C

Additional information

Etherdiamines have a low vapour pressure of 0.0031 Pa at 20 °C and 0.005 Pa at 25 °C.

Etherdiamines have a relatively high solubility in water of 1.3 g/L (4.1328 mmol/L = 4.13 mol/m3). For surface active substances the water solubility is measured as the CMC at pH 7 and 23 °C. Using a molar weight of 314.56 g/mol a Henry law constant can be calculated of 0.00075 Pa m3/mol.