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Solubility measurements of metastable polymorphs are often complicated by solvent-mediated transformation toward more stable forms. In this review, we first summarize potential experimental methods to estimate the solubility of metastable polymorphs. Then, we discuss a methodology based on a thermodynamic model, which allows solubility predictions from (i) solubility data of the stable form, and (ii) solid-state properties of the stable and metastable forms.
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Nicoud et al. (2018) studied this question.
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