Precipitation agent

A precipitation agent is a chemical reagent used to induce the formation of a solid from a liquid solution through a process known as precipitation. In the context of biochemistry and pharmacology, these agents are primarily utilized for the purification, isolation, and concentration of macromolecules such as proteins and nucleic acids, or for the removal of impurities during drug formulation (IUPAC Gold Book, 2014). Common examples include salts like ammonium sulfate used in 'salting-out' proteins, organic solvents like ethanol for DNA precipitation, and various polymers like polyethylene glycol (Wingfield, 2001, PubMed). Because 'Precipitation agent' refers to a broad functional category of laboratory and industrial chemicals rather than a specific biological molecule, receptor, or enzyme, it is not classified as a therapeutic target. It serves a technical role in sample preparation and downstream processing in biotechnology rather than a physiological role in disease modulation.

Other names

PrecipitantFlocculating agentCoagulantChemical precipitant

Induces the formation of a solid (precipitate) from a solution by reacting with a solute to form an insoluble substance or by altering the solvent properties (e.g., polarity, ionic strength) to exceed the solute's solubility limit.