Bromine

**Semantic type:** Element, Ion, or Isotope

**Definition:** A naturally occurring halogen element with atomic symbol Br, atomic number 35, and atomic mass 79.904. Bromine, which is found in the earth's crust and sea water, is used in many industrial processes, as well as in insecticides, fire extinguishers, pharmaceuticals, and food and drink products. It is characterized as a dark reddish-brown liquid with an irritating pungent odor, and exposure occurs by inhalation of fumes, ingestion, or contact.

**Synonyms:** - BROMINE