Bromide

A bromide is a chemical compound containing a bromide ion or ligand. This is a bromine atom with an ionic charge of −1 (Br⁻); for example, in caesium bromide, caesium cations (Cs⁺) are electrically attracted to bromide anions (Br⁻) to form the electrically neutral ionic compound CsBr. The term "bromide" can also refer to a bromine atom with an oxidation number of −1 in covalent compounds such as sulfur dibromide (SBr₂).

Natural occurrence

Bromide is present in typical seawater (35 PSU) with a concentration of around 65 mg/L, which is around 0.2% of all dissolved salts. Seafoods and deep sea plants generally have high levels of bromide, while foods derived from land have variable amounts.

Chemistry

One can test for a bromide ion by adding excess dilute HNO₃ followed by dilute aqueous AgNO₃ solution. The formation of creamy silver bromide precipitate confirms the existence of bromides.

Medical uses

Bromide compounds, especially potassium bromide, were frequently used as sedatives in the 19th and early 20th century. Their use in over-the-counter sedatives and headache remedies (such as Bromo-Seltzer) in the United States extended to 1975, when bromides were withdrawn as ingredients, due to chronic toxicity.

BR

BR or Br may refer to:

Places

Science

Computing

Brue

Coordinates: 58°21′14″N 6°32′56″W / 58.354°N 6.549°W / 58.354; -6.549

Brue (Scottish Gaelic: Brù) is a village on the Isle of Lewis in the West Side district, in the Outer Hebrides, Scotland. It is a crofting township and it is composed of two areas: Am Baile Staigh, which is nearer the coast, and Pàirc Bhrù, which runs towards the moor. In total it covers a road distance of 2.5 km. Brue is situated on a minor road which joins to the A858, and is within the parish of Barvas.

The name Brue is an anglicised form of the Scottish Gaelic Brù which in turn comes from an Old Norse word which is believed to have meant bridge; this reflects the centuries of Norsemen occupation and settlement in the Outer Hebrides.

The coastline at Brue is the site of various cairns, including a prehistoric one, and is also near to the site of a blackhouse.

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