Bromine is found in the Earth's crust, in seawater and as a by-product of chlorine used in pools. Several products used in fire retardants, agriculture and sanitation contain bromine.
This reddish-brown liquid is produced mainly in the United States, China and Japan. Bromine is a naturally occurring chemical but is only found in the compounds of other elements, and it has an odor that resembles bleach.
Bromine poisoning can have serious side effects. It is a strong irritant to the skin and mucous membranes, and it can cause serious breathing problems that can have long-term effects, depending upon exposure time and the patient.