What is Millimol (mmol) and How is it Used in Biochemistry?

Millimol (mmol) is a unit of measurement that represents one-thousandth of a mole (mol). It is often used to express the concentration of substances in solutions, particularly in biochemistry and pharmacology.

One mol is defined as the amount of a substance that contains as many elementary entities (such as atoms or molecules) as there are atoms in 0.012 kilograms of carbon-12. This is equivalent to a mass of approximately 6.02 x 10^23 particles (atoms or molecules).

Therefore, one millimol (mmol) is equal to one-thousandth of a mol, or 0.001 mol. This means that if you have a solution with a concentration of 1 mmol/L (millimoles per liter), you have a total of 0.001 moles of the substance in every liter of the solution.