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Environmental fate & pathways

Henry's Law constant

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Key value for chemical safety assessment

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The Henry’s Law Constant of TCP was calculated with the EUSES model, which gives a value of 13.9 Pa x m3 / mol at 12 °C and 1013 hPa (Wormuth 2010b). Based on the measured Henry’s Law Constant of 22.8 Pa x m3 / mol (Tancrède and Yanagisawa 1990) it is expected that TCP has a moderate volatility from the aqueous phase. Experimental data show that the half-life for stripping of TCP from water is between 1 and 1.5 hours (Dilling 1977, Albanese et al. 1987). On the other hand, significant amounts of TCP may be washed out from the atmosphere by wet deposition considering the water solubility of 1.75 g/L for TCP (WHO 2003).