👉 A threshold fluid, often referred to as a critical fluid, is a substance that exists in a supercritical state at specific conditions of temperature and pressure, acting as a bridge between the liquid and gas phases. When the system's conditions surpass the threshold fluid's critical point, it can neither distinctly separate into liquid nor gas phases but instead exhibits properties of both. This unique state allows the fluid to dissolve substances more effectively than either a liquid or gas alone, making it highly valuable in various applications like extraction processes and chemical reactions.
