MSH: A ubiquitous sodium salt that is commonly used to season food.,CSP: NaCl; plays an important biological role in maintaining the osmotic tension of blood and tissues; for the sodium salt that is commonly used to season food use DIETARY SODIUM.,NCI: A metal halide composed of sodium and chloride with sodium and chloride replacement capabilities. When depleted in the body, sodium must be replaced in order to maintain intracellular osmolarity, nerve conduction, muscle contraction and normal renal function.