MM — Molarity (unit symbol)

The capital letter M is the unit symbol for molarity: mol/L. A solution labeled 0.50 M contains 0.50 moles of solute per liter of solution. Do not confuse it with the lowercase m of molality (mol/kg of solvent), or with m for meter.

SI unit: mol/L

Used in

  • Solution preparation
  • Dilution