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Environmental fate & pathways

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Henry Law Constant (H) of 4.06E-06 Pa-m3/mole was calculated using Equation R.16-4 in Chapter R.16.5.3.2 and measured vapour pressure and water-solubility values. For chemicals with H values less than 0.01 Pa m3/mole, the chemical is less volatile than water. As water evaporates, the concentration of the chemical in the aqueous phase will increase. However, the degree of volatilization of substances from the aquatic environment is highly dependent on the environmental parameters for the specific water bodies in question, such as the depth and the gas exchange coefficient. The test substance emitted to water is expected to remain in the water phase. The test substance emitted to soil is expected to partition to water and have a high to very high mobility to round water due to its low volatility and low adsorption to soil (low Koc). The test substance emitted to air is expected to partition to water in the air and return to the ground through wet-deposition.