Saline is a mixture of salt and water. A normal saline solution is called normal because its salt concentration is similar to tears, blood and other body fluids (0.9% saline). It is also called isotonic solution.

What does normal saline contain?

[2] Normal saline contains electrolytes (sodium and chloride ions) which dissociates in solution. Sodium ions are the main electrolytes of extracellular fluid, integral in the distribution of fluids and other electrolytes.

What kind of solution is normal saline?

Normal saline (NSS, NS or N/S) is the commonly used phrase for a solution of 0.90% w/v of NaCl, 308 mOsm/L or 9.0 g per liter. Less commonly, this solution is referred to as physiological saline or isotonic saline (because it is approximately isotonic to blood serum, which makes it a physiologically normal solution).