Kf•H2O2 solubility in organic solvents and water-organic mixtures

Potassium fluoride monoperoxosolvate KF (.) H2O2 is poorly soluble in ethanol, n-butanol, monoglyme, and dioxane. The solubility increases in mixtures of these solvents with water, but the solutions are unstable. KF (.) H2O2 readily dissolves in mixtures of water and glycerol, and the solutions are stable. The solvate solubility in a mixture of 85 wt % glycerol + 15 wt % water (85 : 15) at 22degreesC is 17.8 wt %. In a 60 : 40 solvent the solubility is 23.8 wt %. As a result of peroxosolvate dissociation, additional amounts of hydrogen peroxide (2.48 wt % in the 85 : 15 mixture and 5.73 wt % in the 60 : 40 mixture) transfer to the solutions. The average rate constant of decomposition calculated by the equation ln c(0)/c = k(tau - tau(0)) varies from 1.1 x 10(-4) h(-1) for the 85 : 15 mixture to 4.3 x 10(-4) h(-1) for the 60: 40 mixture. The PFK-1 disinfectant containing KF (.) H2O2 as the basis and a KHF2 additive is well soluble in water-glycerol mixtures, and the solutions are stable. The disinfectant studied in this work was obtained under conditions close to the industrial ones. The rate constants of PFK-1 decomposition are (0.4-0.6) x 10(-4) h(-1), irrespective of the water-to-glycerol ratio.