Question

A powder has a Carr's compressibility index in the range of 12-16. The flowability of the powder will be

• A. Fair
• B. Excellent
• C. Good
• D. Very poor

Hint:

Lower Carr's index indicates better flowability, which reduces problems like segregation and inconsistent dosing during manufacturing.

Answer 1

The Correct Option is C

Carr's Compressibility Index (CCI) is an indirect measure of powder flowability and packing ability. It is calculated using bulk density and tapped density of the powder as: \[ \text{CCI} = \frac{\text{Tapped density} - \text{Bulk density}}{\text{Tapped density}} \times 100 \] The flowability categories based on CCI values are: - 5-10: Excellent flow
- 11-15: Good flow
- 16-20: Fair flow
- 21-25: Poor flow
- > 25: Very poor flow
Since the given Carr's index is in the range 12-16, it falls in the "Good" flowability range, indicating the powder will flow well enough for typical pharmaceutical processing but is not excellent. This parameter is critical in tablet formulation and capsule filling to ensure uniformity and ease of processing.