The n-octanol-water partition coefficient, Kow is a partition coefficient for the two-phase system consisting of n -octanol and water. [1] . Kow is also frequently referred to by the symbol P, especially in the English literature. It is also called n-octanol-water partition ratio. [2][3][4]

正辛醇-水分配系数(Octanol-Water Partition Coefficient, Kow，或称辛醇-水分配系数)为讨论有机污染物在环境介质（水、土壤或沉积物）中分配平衡的极其重要的参数。

2016年1月13日 · n-Octanol/Water Partition Coefficient (Kow) is defined as the ratio of the concentration of a chemical in n-octanol and water at equilibrium at a specified temperature. Values of Kow are unitless and usually expressed as logKow, a relative indicator of the tendency of an organic compound to adsorb to soil and living organism.

2019年1月9日 · The n-octanol/water partition ratio or coefficient (log Kow) and n-octanol/water distribution coefficient (log D) are key parameters in environmental risk assessment of chemicals as they are often used to estimate the environmental fate and bioavailability and thus exposure and toxicity of a compound.

2004年11月14日 · The octanol/water partition coefficient (Kow) is defined as the ratio of a chemical's concentration in the octanol phase to its concentration in the aqueous phase of a two-phase octanol/water system. Kow = Concentration in octanol phase / Concentration in aqueous phase. Values of Kow are thus, unitless.

APPENDIX K Soil Organic Carbon (Koc) / Water (Kow) Partition Coefficients. Table K-1. Values Used for K. oc/ K. owCorrelation.

Table 6 above shows that Pb, Cd, Cu, and Zn have a log Kow value >0 (positive), meaning that Pb, Cd, Cu, and Zn have the hydrophobic or lipophilic character (prefer fat) so that they have the...

Chemical-specific parameters required for calculating soil screening levels include the organic carbon normalized soil-water partition coefficient for organic compounds (K. oc), the soil-water partition coefficient for inorganic constituents (K. d), water solubility (S), Henry's law constant (HLC, HN), air diffusivity (D.

The KOWWIN program estimates KOW using an atom/fragment contribution approach. It was developed by Meylan and Howard (Meylan and Howard, 1995; Meylan et al, 1996; Meylan and Howard, 2000) using a training set of 2473 compounds, and a validation set of 10589 compounds representing molecules with simple to complex structures.

Octanol-Water Partition Coefficient refers to the distribution of an organic compound between octanol and water phases, quantifying the substance's lipophilic and hydrophilic properties. It is a key physical/chemical property used to assess the environmental impact of agricultural and industrial chemicals.