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A corrosive, nonmetallic element. Bromine is a dark, reddish-brown liquid at room temperature. It occurs in seawater at concentrations of about 65 parts per million. Bromine was first identified as a separate chemical element in a 1826 publication by a French chemist Antoint-Jerome Balard. Bromine is used in fumigants, dyes, photographic chemicals, and as a flame retardant in plastics. It is also used for the chemical extraction of gold from ores.

Synonyms and Related Terms

Br; Broom (Ned.); brome (Fr.); Brom (Deut., Sven.); bromus (Gr.) ; bromo (It., Port., Esp.)


  • Skin contact will cause severe burns.
  • It is very corrosive and a strong oxidizer.
  • Inhalation of bromine vapors is toxic and will burn throat and lung tissue.
  • Toxic by ingestion. (antidote is ammonia or thiosulfate)
  • ThermoFisher: SDS

Physical and Chemical Properties

Soluble in ethanol, ether, chloroform, carbon disulfide. Slightly soluble in water.

Composition Br (atomic no. 35)
CAS 7726-95-6
Melting Point -7.2 C
Density 3.1193 g/ml
Molecular Weight atomic wt = 79.904
Boiling Point 58.8 C

Resources and Citations

  • Chemical & Engineering News, American Chemical Society, Washington DC, 81 (36) , Sept. 8, 2003 Comment: Ari Greenspan, p. 96
  • G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 119
  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: Entry 1364
  • Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
  • The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998

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