mgmL

mgmL is a unit of concentration that denotes milligrams of solute per milliliter of solution. It is commonly written as mg/mL, a standard notation in chemistry, pharmacology, and biology. The numeric value in mg/mL is equivalent to the number of grams per liter (g/L), since 1 mg/mL equals 1 g/L. In weight/volume terms, 1 mg/mL also corresponds to 0.1% w/v, because 1 g per liter is 0.1 g per 100 mL.

To convert mg/mL to molarity (M), the molecular weight of the solute is required. The relationship is M = (mg/mL) × 1000 / MW, where MW is in g/mol. For example, a 5 mg/mL solution of a compound with a molecular weight of 300 g/mol equals 5 × 1000 / 300 = 16.7 mM.

mgmL is widely used for pharmaceutical formulations, laboratory reagents, and in vitro biological assays where precise dosing in small volumes is needed. Solutions in culture media, intravenous preparations, and topical formulations are often described in mg/mL. It is important to recognize that mg/mL expresses mass per volume and is not inherently a molar concentration; comparing across substances with different molecular weights requires conversion to molarity or another standard.

Measurement of mg/mL relies on accurate mass determination (using a balance) and precise volume measurement (using pipettes or volumetric flasks). Temperature can affect solution volume, so mg/mL values typically assume a defined temperature range (commonly around room temperature).