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Environmental fate & pathways

Henry's Law constant

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Description of key information

The Henry's Law Constant of 0.0616 Pa m³/mol for adipic acid is estimated from the ratio of its vapour pressure to its water solubility at a temperature of 25 °C (Currenta, 2009).

Key value for chemical safety assessment

Additional information

For the mixture no data on volatility from water are available. Adipic acid is applied for read-across approach.

The distribution of dicarboxylic acids between aqueous solutions and air is described by the Henry´s law constant of adipic acid.

The Henry's Law Constant of 0.0616 Pa m³/mol for adipic acid is estimated from the ratio of its vapour pressure to its water solubility at a temperature of 25 °C (Currenta, 2009) indicating a low rate of volatilisation from surface water.

Based upon the similarity to the physico-chemical properties of each constituent, it is concluded that the dicarboxylic acids are essentially non-volatile from surface waters.