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Environmental fate & pathways

Henry's Law constant

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Description of key information

Henry's Law constant for DIDP is calculated as 114 Pa.m3/mole at 25 degrees C.

Key value for chemical safety assessment

Additional information

DIDP vapor pressure is very low, 0.000051 Pa, which suggests very limited volatilization from the terrestrial compartment. In comparison, Henry’s Law constant for DIDP is calculated as 114 Pa-m3/mole at 25 degrees C, which indicates that volatilization from water is not expected to occur at a rapid rate, but may occur at a significant rate. DIDP can volatilize to air from aqueous environments at a significant rate, but is expected to have limited volatilization from soil.