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Environmental fate & pathways

Henry's Law constant

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Administrative data

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Description of key information

Calculated values (25C): 0.002 to 0.01 ; 0.56
Measured values: .116 (at 25C) , .041; .055 (at 20C)
Measured value (physiological saline/air): 0.366 (at 37C)
All values in units of Pa.m3/mol

Key value for chemical safety assessment

Henry's law constant (H) (in Pa m³/mol):
0.05
at the temperature of:
20 °C

Additional information

Both calculated and measured values are available for the Henry's law constant. An average of the two values measured at 20C is used to derive the key parameter, which is expressed in Pa.m3/mol. A value is also available for the partition co-efficient between physiological saline and air at 37C.

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