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Inhibiting Sublimation of Thymol by Cocrystallization
Journal article   Open access   Peer reviewed

Inhibiting Sublimation of Thymol by Cocrystallization

Hui Zu, Rodger F Henry, Geoff G Z Zhang and Leonard R MacGillivray
Journal of pharmaceutical sciences, Vol.112(1), pp.350-353
01/2023
DOI: 10.1016/j.xphs.2022.10.019
url
https://doi.org/10.1016/j.xphs.2022.10.019View
Published (Version of record) Open Access

Abstract

A thymol:4,4’-dipyridyl (2:1) cocrystal (Form I) is reported to suppress thymol sublimation. The cocrystal was prepared via solution-mediated phase transformation and its structure is sustained by O-H (phenol) ··· N (pyridyl) hydrogen bonds between two individual components. A cocrystal polymorph (Form II) was formed via solid state transformation or via vapor phase upon heating. Using gravimetry analysis, it was demonstrated that cocrystal Form I decreased the sublimation rate of thymol by 38-fold. This study demonstrates that cocrystallization is an effective approach to reduce vapor pressure and sublimation of solids, thus achieving odor-masking

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