👉 A duplicate fluid, also known as a duplicate liquid or diluent, is a substance added to a solution to maintain its volume and dilute the solute, typically in the context of preparing stock solutions or diluting concentrated solutions. This fluid does not participate in the chemical reaction but ensures that the final solution remains isotonic or appropriately diluted for biological, chemical, or analytical purposes. Common examples include water, saline solutions, and other non-reactive liquids used to adjust the concentration of solutes without altering the solution's physical properties.
