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Environmental fate & pathways

Henry's Law constant

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Description of key information

Considering its vapour pressure, volatility and resultant Henry’s Law Constant, chloromethane is expected, under equilibrium conditions, to exist principally in the air.

Key value for chemical safety assessment

Additional information

With respect to theaqueous compartmentthe Henry’s Law Constant for chloromethane is894 Pa m³/mol (25 °C). Due to the highHenry’s Law Constantthe substance will evaporate from the water surface to the atmosphere.