Question

What is the ideal particle size for topical powders?

• A. 50 to 100 µm
• B. 150 to 250 µm
• C. 250 to 500 µm
• D. Above 1000 µm

Hint:

Smaller particle size (50–100 µm) = better spreadability and skin feel in topical powders.

Answer 1

The Correct Option is A

Topical powders must have a particle size small enough to avoid irritation and ensure uniform distribution. 50 to 100 µm is considered ideal for skin application.