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Impact of solid / vapour equilibria on conditions of crystallization of pharmaceutical compounds

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Abstract

The influence of solvent (in its gaseous state) on the stability of crystallized organic compounds was investigated. Through two examples of studies on the solid/vapour equilibria made in our lab, several behaviors were highlighted: (i) a new hydrated phase (thermodynamically stable) of an active pharmaceutical ingredient (API) was detected after the recrystallization starting from a deliquescent state, (ii) a spontaneous resolution of a hydrated racemic compound towards an anhydrous conglomerate can occur during the desolvation under the precise conditions of temperature and humidity. This study illustrates that knowledge about solid/vapour equilibrium is a crucial step during the complete characterization of solid organic compounds.

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Correspondence to Yohann Cartigny.

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Cartigny, Y., Coquerel, G. Impact of solid / vapour equilibria on conditions of crystallization of pharmaceutical compounds. Trans. Tianjin Univ. 19, 53–57 (2013). https://doi.org/10.1007/s12209-013-1800-7

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  • DOI: https://doi.org/10.1007/s12209-013-1800-7

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