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Smelling salts are a chemical compound that releases small amounts of ammonia gas, which essentially jump starts your bodyâs nervous system. The ammonia causes blood vessels in your nasal passages to expand providing an instant increase in oxygen to your brain meaning an instantaneous boost of alertness and power.
ammonia. a colorless alkaline gas, NH 3, with a pungent odor and acrid taste, and soluble in water. ammonia N 13 ammonia in which a portion of the molecules are labeled with 13 N; used in positron emission tomography of the cardiovascular system, brain, and liver. colorless alkaline gas, NH 3, with a pungent odor and acrid taste, and highly soluble in water. See also ammonium. blood ammonia. ammonia is a cerebrointoxicant and a high blood level causes a degenerative brain lesion.