Supercritical fluid

A supercritical fluid is a state of matter that occurs when a substance is subjected to temperatures and pressures above its critical point. At this state, the fluid exhibits properties of both liquids and gases. Specifically, supercritical fluids have the ability to diffuse through solids like a gas while also dissolving materials like a liquid. The critical point is the temperature and pressure at which the distinctions between liquid and gas phases become indistinguishable.