Solubility, metastable zone width and induction period of (R)-3-(methylamino)-1-phenylpropanol hydrochloride (MPH) in ethanol were determined by synthetic method at atmospheric pressure. The measured induction period data are also used to estimate the interfacial tension values of the system. The determined interfacial tension values have been also used to evaluate the nucleation parameters, such as the radius of the critical nuclei, the free energy change per unit volume, the critical free energy barriers.
Non-isothermal thermogravimetry analysis was applied to study the thermal decomposition kinetics of ulipristal acetate (form B). According to the experimental result, ulipristal acetate (form B) decomposed included three steps. Based on different kinetics function of corresponding thermal decomposition mechanisms and experimental data of ulipristal acetate (form B), decomposition mechanisms of three steps of ulipristal acetate (form B) were analyzed by differential method. According to fitting results of different mechanism functions, decomposition mechanisms of three steps of ulipristal acetate (form B) were determined, and three corresponding thermal decomposition dynamic functions were also obtained.
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