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- W1997016865 abstract "The solubility of secobarbital in water at various temperatures was determined and from this information a plot was prepared, log S vs . 1/ T . The linear relationship indicated the adherence of the curve to van't Hoff's equation. From the slope, the heat of solution was calculated and found to be 4358.0 cal./deg./mole. Solubility studies were also undertaken to determine the quantity of secobarbital which would dissolve in various binary solvent systems in which water was always the second solvent. The order of solubility increased from glycerin–propylene glycol–PEG 400–alcohol. Glycerin had very little solubilizing activity for secobarbital even in volume concentrations up to 50 per cent. In a three-component solvent system composed of alcohol: glycerin : water, the glycerin produced a synergistic effect on the dissolution reaction. Finally, the influence of pH on solubility of secobarbital in water alone and in several mixed solvents was ascertained, and the results plotted as solubility curves. It was also demonstrated that alcohol, propylene glycol, glycerin, and PEG 400 suppressed ionization of secobarbital in aqueous solutions. All of the solvents except PEG 400 showed a linear relationship in the solvent concentration studied." @default.
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- W1997016865 date "1960-06-01" @default.
- W1997016865 modified "2023-09-25" @default.
- W1997016865 title "Study of the Stability of Secobarbital Sodium Solutions I**Received August 21, 1959, from the College of Pharmacy, University of Michigan, Ann Arbor." @default.
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- W1997016865 doi "https://doi.org/10.1002/jps.3030490614" @default.
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