In medicine, saline is a general term referring to a sterile solution of sodium chloride in water, frequently used for intravenous infusion, rinsing contact lenses, and nasal irrigation. Saline solutions are available in various formulations for different purposes. Salines are also used in cell biology, molecular biology and biochemistry experiments. Normal saline is a solution of 0.9% w/v of NaCl . It contains 154 mEq/L of Na and Cl....