1. Ingredients: Salt in plain water, the main ingredient of which is sodium chloride, is a common household cooking method. Physiological saline, also called sodium chloride solution, whose main ingredient is also sodium chloride, but at a concentration of 0.9%, which is similar to the concentration of the liquid environment in which the body's cells live.
2. Uses: Salt in plain water is mainly used in home cooking, for example, in stews or soups, adding some salt can adjust the flavor of the ingredients and provide basic electrolytes to maintain normal body functions. Saline is mainly used for medical purposes, such as rehydrating fluids, cleaning wounds, and maintaining the normal form of cells.
In summary, plain water with salt is mainly used for home cooking, while saline is mainly used for medical purposes and laboratory research.