Bromoxynil and Pentachlorophenol Acidity Constants in Water-Methanol Media

Author(s): S. M. Kulikov and J. Wiltshire

A pH- metric determination of pK a values of 3, 5-dibromo-4-hydroxy-benzonitrile (bro moxynil) and pentachlorophenol (PCP) was carried out in wate r-methanol media with subsequent extrapolation to pure aqueous solutions. pK a values in water at 25°C were found to be 3.83 ± 0 .05 for bromoxynil, and 4.50 ± 0.03 for pentachlorophenol.

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