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Article . 1979

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Physico-chemical analysis of systems with a main component acetylsalicylic acid in ethanol-water mixtures. Part 3: Systems containing calcium acetylsalicylate.

descriptionPublicationkeyboard_double_arrow_right Article 26 Jun 1979Journal:Die Pharmazie, volume 34 (issn: 0031-7144,

Authors: D S, Ivanov; D, Trendafelov; V G, Karaivanova;

pmid: 432252

Physico-chemical analysis of systems with a main component acetylsalicylic acid in ethanol-water mixtures. Part 3: Systems containing calcium acetylsalicylate.

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Abstract

The systems C9H8O4-(C9H7O4)2Ca-25% ethanol-water mixture (I), C9H8O4-(C9H7O4)2Ca-50% ethanol-water mixture (II), C9H8O4-(C9H7O4)2Ca-95% ethanol-water mixture (III) have been investigated at 15 degrees C by physico-chemical analytical methods. It was established that under the conditions of the no experiments no double or triple compounds of acetylsalicylic acid and calcium acetylsalicylate have been formed. The fields of the crystallization of the pure components are outlined. In systems I and II there exist crystallization fields of (C9H7O4)2Ca - 2H2O and in system III field of (C9H7O4)2Ca. The anhydrous salt and the crystalline hydrate were isolated and were investigated by chemical analysis and X-ray diffraction analysis.

Keywords

Aspirin, Chemical Phenomena, Ethanol, Solubility, X-Ray Diffraction, Chemistry, Physical, Water, Calcium, Crystallization

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