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Polymorphism of erythromycin studied by differential thermal analysis
Il Farmaco; Edizione Scientifica
|April 1, 1976
Summary
This study characterized three main forms of erythromycin, including crystalline and amorphous structures. Physical stability of these erythromycin polymorphs in dry and aqueous states was evaluated.
Area of Science:
- Pharmaceutical Science
- Solid-State Chemistry
Background:
- Erythromycin is a widely used antibiotic with a complex polymorphic behavior.
- Understanding erythromycin polymorphism is crucial for drug formulation and stability.
Purpose of the Study:
- To characterize the different polymorphic forms of erythromycin.
- To investigate the stability of these forms in various conditions.
Main Methods:
- Differential thermal analysis (DTA) was employed.
- Characterization of crystalline and amorphous forms.
- Analysis of solvates and imbibition water.
Main Results:
- Three primary erythromycin forms were identified: two crystalline (I, SI) and one amorphous.
- Solvates with 2-propanol (SII), trichloromethane (SIII), and tetrachloromethane (SIV) were characterized.
- Distinction between solvation and imbibition water was achieved.
Conclusions:
- The study successfully differentiated and characterized key erythromycin polymorphs.
- Insights into the physical stability of erythromycin forms were provided.
- This research contributes to the understanding of erythromycin solid-state properties.