Millimolar (mM) and micromolar (µM) are units of concentration. Millimolar is equal to 10-3 molar, and micromolar is equal to 10-6 molar.
The formula to convert millimolar to micromolar is:
\[ \text{Micromolar (µM)} = \text{Millimolar (mM)} \times 1000 \]
Consider a solution with a concentration of 2 millimolar (mM):
Using the formula:
\[ \text{Micromolar (µM)} = 2 \times 1000 = 2000 \text{ µM} \]
This means the concentration is 2000 micromolar (µM).