Millimoles

Millimoles is a unit of measurement used in Chemistry and Biochemistry to quantify the amount of a particular substance. It is a subunit of the mole, which is one of the seven base units in the International System of Units (SI).

Definition

A millimole (mmol) is one-thousandth of a mole. The mole is defined as the amount of a substance that contains as many entities (such as atoms, molecules, or ions) as there are in 12 grams of pure carbon-12. Therefore, one millimole of a substance contains 1/1000 of this number of entities.

Usage

Millimoles are commonly used in chemistry and biochemistry to express concentrations of substances in solutions. For example, the concentration of a solute in a solution can be expressed in millimoles per liter (molar concentration). In clinical chemistry, millimoles are often used to express the concentration of substances in blood or urine.

Conversion

To convert from moles to millimoles, one can use the conversion factor of 1 mole = 1000 millimoles. Conversely, to convert from millimoles to moles, one can use the conversion factor of 1 millimole = 0.001 moles.

See also

• Mole (unit)
• International System of Units
• Molarity
• Clinical chemistry