Kow octanol-water partition

The physical properties of -hexane (see Table 3-2) that affect its transport and partitioning in the environment are water solubility of 9.5 mg/L log Kow (octanol/water partition coefficient), estimated as 3.29 Henry s law constant, 1.69 atm-m3 mol vapor pressure, 150 mm Hg at 25 °C and log Koc in the range of 2.90 to 3.61. As with many alkanes, experimental methods for the estimation of the Koc parameter are lacking, so that estimates must be made based on theoretical considerations (Montgomery 1991). 

K°c organic carbon partition coefficient Kow octanol-water partition coefficient L liter... 

Figure 1.1.1 Examples of property estimation techniques (Sw = water solubility Kow = octanol-water partition coefficient). Chlorobenzene is the query compound. F are fragment or atom constants / is a property-property or a structure-property relationship.

S = water solubility P = vapor pressure Kow = octanol-water partition coefficient koH = second order reaction rate constant with hydroxyl radicals. 

Adapted from Lyman et al. (1990) unless otherwise noted. BCF, bioconcentration factor Kow, octanol-water partition coefficient S, water solubility Koc, organic carbon-water partition coefficient. 

Kow Octanol-water partition coefficient the ratio of concentration of a substance in octanol solution to that in water solution when the two are in equilibrium. Usually reported as the base 10 logarithm, log.K ow... 

FIGURE 6 Phase distribution equilibria involving pure phases with importance for describing environmental phase partitioning. Kaw, air-water partition coefficient Kow, octanol-water partition coefficient Kqa, octanol-air partition coefficient Pl, (supercooled) liquid vapor pressure Cw and Co, saturation solubility in water and octanol, respectively yw and yo, activity coefficient in water and octanol, respectively. 

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