Crystallization of Piroxicam Solid Forms and the Effects of Additives

Guangpu Liu, Thomas B. Hansen, Haiyan Qu*, Mingshi Yang, Jari P. Pajander, Jukka Rantanen, Lars P. Christensen

*Corresponding author for this work
    17 Citations (Scopus)

    Abstract

    The relative stabilities of the two anhydrous polymorphs and the monohydrate of piroxicam in ethanol/water mixtures and the crystallization behavior of the solid forms in the presence of 11 additives were studied. At 37°C, formII is thermodynamically more stable than formI, while the relative stability of formII and the monohydrate depends on the water concentration in the solution. The total Hansen solubility parameter δT and the hydrogen bonding solubility parameter δH of the substances can partly explain the effects of the additives on the crystallization of the solid forms. The additives that selectively promoted the crystallization of formI are the ones with δT and δH parameters similar to those of piroxicam.

    Original languageEnglish
    JournalChemical Engineering and Technology
    Volume37
    Issue number8
    Pages (from-to)1297-1304
    Number of pages8
    ISSN0930-7516
    DOIs
    Publication statusPublished - 2014

    Keywords

    • Crystallization
    • Effect of additives
    • Monohydrate
    • Pharmaceutical products
    • Polymorphism
    • Relative thermodynamic stability

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