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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

Additional information

The Henry's Law Constant was estimated according to the bond estimation method resulting in a value of 8.72E-06 Pa*m³/mol (HENRYWIN Program, v3.20; EPI Suite v4.10; BASF SE, 2012), which is representative for the uncharged molecule. The substance is within the applicability domain of the model. At environmental conditions the molecule is expected to be ionised (pKa = 8.52; measured, Perrin, 1978), therefore a pH-corrected Koc was calculated according to the REACH Guidance document (2008). The resulting Henry's Law constant was 1.78E-07 Pa*m³/mol at pH 7 (range pH 5 to 9: 1.82E-09 to 5.90E-06 Pa m³/mol; BASF SE, 2013).

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