Characterization of Inert Cores for Multiparticulate Dosage Forms

  • Richard Sidwell
  • Jason Hansell
  • Manish Rane
  • Ali R. Rajabi-SiahboomiEmail author
Part of the Advances in Delivery Science and Technology book series (ADST)


For many multiparticulate products, the process begins with an inert core. As the starting material, the characteristics of an inert core influence each successive step including the end-product performance. Identifying the critical to quality attributes (CQA) of an inert core and how they influence a product is essential throughout the development, scale-up, and manufacturing stages. In this chapter, various characteristics such as surface area, particle size distribution, various density, shape, surface morphology, robustness and processability, hardness and tensile strength, and friability are discussed. These tests are beyond the pharmacopeial tests of standard and purity and usually do not appear on most of the inert core excipient manufacturers’ certificate of analysis. Understanding these characteristics helps in developing a robust product and also understands any unforeseen variability between different and the same batch of final multiparticulate dosage form.


Inert cores Sugar sphere Pellets Beads Multiparticulates Particle size Friability 


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Copyright information

© Controlled Release Society 2017

Authors and Affiliations

  • Richard Sidwell
    • 1
  • Jason Hansell
    • 2
  • Manish Rane
    • 2
  • Ali R. Rajabi-Siahboomi
    • 3
    Email author
  1. 1.Recro Pharma Inc.GainesvilleUSA
  2. 2.Colorcon Inc.HarleysvilleUSA
  3. 3.Colorcon Inc.HarleysvilleUSA

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