- Rheology is the science of flow and deformation of matter, especially liquids and semisolids.
- In physical pharmaceutics, understanding rheology is crucial for:
- Designing liquid formulations (e.g., syrups, emulsions, suspensions),
- Semi-solids (e.g., creams, ointments, gels),
- And ensuring proper processing, mixing, filling, and dispensing of products.
Rheology is important for:
- Processing (pumping, mixing, filling bottles)
- Product performance (e.g., spreadability of a cream, pourability of a syrup)
- Stability (sedimentation in suspensions, creaming in emulsions)
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