Bromide
Br⁻
Bromide refers to a chemical compound that contains the bromine anion (Br-) combined with a cation, usually a metal ion such as sodium (Na+), potassium (K+), or calcium (Ca2+). Bromides are commonly used in photography, due to their light-sensitive nature, as well as in pharmaceuticals and as flame retardants.
Bromide salts are sometimes used as sedatives or as anticonvulsant medication for epileptic patients. However, the use of bromide salts has been largely replaced by other more effective medications because of their side effects, which include lethargy, depression, and acne outbreaks.
Bromide ions also have a significant impact on the environment, particularly in relation to the ocean. Large amounts of bromide leach into the ocean from coastal areas where bromide salts are produced or used. When exposed to sunlight, bromide ions react with naturally occurring organic matter to produce brominated disinfection byproducts and bromine gases, which can have adverse effects on wildlife and people living near the coast.
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