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Related Experiment Videos

Polymorphic changes of mannitol during freeze-drying: effect of surface-active agents

R Haikala1, R Eerola, V P Tanninen

  • 1Orion Pharma, Espoo, Finland.

PDA Journal of Pharmaceutical Science and Technology
|March 1, 1997
PubMed
Summary
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Polysorbate 80 significantly altered the crystalline properties of mannitol during freeze-drying. This excipient impacts both the crystal structure and overall crystallinity of the final lyophilized product.

Area of Science:

  • Pharmaceutical Sciences
  • Materials Science
  • Physical Chemistry

Background:

  • Crystallinity and polymorphism are critical for the performance of lyophilized (freeze-dried) pharmaceutical products.
  • These properties influence key characteristics such as drug solubility and formulation stability.
  • Understanding excipient interactions is vital for optimizing freeze-drying processes.

Purpose of the Study:

  • To investigate the impact of polysorbate 80 on the crystalline properties of mannitol during freeze-drying.
  • To determine how polysorbate 80 affects mannitol's polymorphism and crystallinity.
  • To provide insights into excipient-excipient interactions in freeze-dried systems.

Main Methods:

  • Freeze-drying of mannitol with varying concentrations of polysorbate 80.

Related Experiment Videos

  • Characterization of crystalline properties using techniques such as X-ray powder diffraction (XRPD) and differential scanning calorimetry (DSC).
  • Analysis of changes in polymorphic forms and degree of crystallinity.

    • Main Results:

    • Polysorbate 80 demonstrably affected the polymorphism of mannitol.
    • The presence of polysorbate 80 also influenced the overall crystallinity of the freeze-dried mannitol.
    • Specific changes in crystalline structure were observed correlating with polysorbate 80 concentration.

    Conclusions:

    • Polysorbate 80 acts as a significant modulator of mannitol's crystalline behavior during freeze-drying.
    • The findings highlight the importance of considering polysorbate 80's effects on excipient crystallinity for formulation development.
    • This study contributes to a better understanding of excipient-induced changes in lyophilized systems.