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Environmental fate & pathways

Henry's Law constant

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Description of key information

From the water surface the substance will not evaporate into the atmosphere.

Key value for chemical safety assessment

at the temperature of:
25 °C

Additional information

The Henry's Law Constant was calculated based on measured data for the vapour pressure and water solubility. The HLC resulted in a value of 2.52 E-07 Pa*m³/mol. This indicates that the substance will not evaporate from the water surface into the atmosphere. The bond estimation method gives a value of 0.615 Pa*m³/mol (HENRYWIN Program, v3.20; EPI Suite v4.10; BASF SE, 2011), which is representative for the uncharged molecule. At environmental conditions the molecule is expected to be ionised, therefore a pH-corrected Koc was calculated according to the REACH Guidance document (2008). The resulting Henry's Law constant was 7.72 E-09 at pH 7 (BASF, 2011).

Based on the pH-corrected HLC, the substance will not evaporate from the water surface into the atmosphere.