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Environmental fate & pathways

Henry's Law constant

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Description of key information

The calculated Henry's Law constant is 7150 (1,3-butadiene) to 98200 (butane) Pa m³/mol

Key value for chemical safety assessment

Additional information

The Henry's Law constant of 1,3-butadiene, butane and 2 -butene has been calculated by a QSAR model with two modules recommended by ECHA (2008) Guidance on information requirements and chemical safety assessment R7a Endpoint specific guidance. The calculated values indicate that volatilisation from water is expected to occur at a rapid rate.