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Physical and Chemical Properties of Oxalic Acid N'-Tosylhydrazide Ethyl Ether

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Abstract

We present the results of the investigation of the physicochemical properties of oxalic acid N'-tosylhydrazide ethyl ester (THE). The solubility of the reagent was examined in ethanol, 0.1 mol/L KOH solution, toluene, chloroform, hexane, and water using spectrophotometry, refractometry, and gravimetry. The results suggest that THE can be useful in flotation and extraction processes. Acid–base equilibria in the reagent solutions were studied by spectrophotometric methods. The obtained dissociation constants (pKa1 = 7.56 ± 0.14; pKa2 = 13.48 ± 0.22) confirm that THE is a weak dibasic acid. The hydrolytic stability of the reagent was investigated spectrophotometrically. The research findings indicate that THE solutions are sufficiently stable over time in alkaline media, with a hydrolysis rate of 4.77% over 2 h. The surface activity of the reagent was determined by the stalagmometric method, revealing that THE is a surfactant.

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This work was supported by ongoing institutional funding. No additional grants to carry out or direct this particular research were obtained.

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Authors and Affiliations

  1. Perm State National Research University, 614990, Perm, Russia

    Yu. B. Elchishcheva, O. A. Posokhina & P. T. Pavlov

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  1. Yu. B. Elchishcheva
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  2. O. A. Posokhina
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  3. P. T. Pavlov
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Correspondence to Yu. B. Elchishcheva.

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The article underwent additional review by Reviews and Advances in Chemistry and was revised before its publication in Reviews and Advances in Chemistry, as compared to the version published in Russian.

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Translated by O. Zhukova

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Elchishcheva, Y.B., Posokhina, O.A. & Pavlov, P.T. Physical and Chemical Properties of Oxalic Acid N'-Tosylhydrazide Ethyl Ether. rev. and adv. in chem. 13, 276–285 (2023). https://doi.org/10.1134/S2634827623600159

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