millimolarities

Millimolarity refers to a unit of concentration in chemistry. It is a sub-unit of molarity, which expresses the amount of solute per liter of solution. Specifically, millimolarity denotes the number of millimoles of solute dissolved in one liter of solution. The prefix "milli" signifies a factor of one-thousandth, so one millimolar (mM) solution contains 0.001 moles of solute per liter. This unit is frequently used in biological and biochemical contexts where concentrations of substances like ions, substrates, or inhibitors are often in the millimolar range. It is particularly convenient for expressing small quantities of materials encountered in laboratory experiments. The relationship between molarity and millimolarity can be expressed as: Molarity (M) = Millimolarity (mM) / 1000, or conversely, Millimolarity (mM) = Molarity (M) * 1000. For example, a 0.1 M solution of sodium chloride is equivalent to a 100 mM solution. This unit helps to simplify calculations and reporting when dealing with dilute solutions, making it a practical choice for many scientific applications.