Potassium bromide

Potassium bromide
Potassium bromide
Potassium bromide
Identifiers
3D model (JSmol)
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.028.937 Edit this at Wikidata
RTECS number
  • TS7650000
UNII
  • InChI=1S/BrH.K/h1H;/q;+1/p-1 ☒N
    Key: IOLCXVTUBQKXJR-UHFFFAOYSA-M ☒N
  • InChI=1/BrH.K/h1H;/q;+1/p-1
    Key: IOLCXVTUBQKXJR-REWHXWOFAT
  • [K+].[Br-]
Properties
KBr
Molar mass 119.002 g/mol
Appearance white solid
Odor odorless
Density 2.74 g/cm3
Melting point 734 °C (1,353 °F; 1,007 K)
Boiling point 1,435 °C (2,615 °F; 1,708 K)
535 g/L (0 °C)
678 g/L (25 °C)
1020 g/L (100 °C)
Solubility very slightly soluble in diethyl ether
Solubility in glycerol 217 g/L
Solubility in ethanol 47.6 g/L (80 °C)
−49.1·10−6 cm3/mol
1.559
Structure
Sodium chloride(Face-centered cubic)
octahedral
10.41 D (gas)
Pharmacology
QN03AX91 (WHO)
Hazards
GHS labelling:
GHS07: Exclamation mark
Warning
H319
P280, P305+P351+P338, P337+P313[1]
NFPA 704 (fire diamond)
[3]
NFPA 704 four-colored diamondHealth 1: Exposure would cause irritation but only minor residual injury. E.g. turpentineFlammability 0: Will not burn. E.g. waterInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
1
0
0
Lethal dose or concentration (LD, LC):
3070 mg/kg (oral, rat)[2]
Related compounds
Other anions
 Potassium fluoride
Potassium chloride
Potassium iodide
Other cations
 Lithium bromide
Sodium bromide
Rubidium bromide
Caesium bromide
Francium bromide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Potassium bromide (KBr) is a salt, widely used as an anticonvulsant and a sedative in the late 19th and early 20th centuries, with over-the-counter use extending to 1975 in the US. Its action is due to the bromide ion (sodium bromide is equally effective). Potassium bromide is used as a veterinary drug, in antiepileptic medication for dogs.

Under standard conditions, potassium bromide is a white crystalline powder. It is freely soluble in water; it is not soluble in acetonitrile. In a dilute aqueous solution, potassium bromide tastes sweet, at higher concentrations it tastes bitter, and tastes salty when the concentration is even higher. These effects are mainly due to the properties of the potassium ion—sodium bromide tastes salty at any concentration. In high concentration, potassium bromide strongly irritates the gastric mucous membrane, causing nausea and sometimes vomiting (a typical effect of all soluble potassium salts).[citation needed]

  1. ^ "Potassium bromide 221864". Archived from the original on 3 June 2021. Retrieved 1 October 2018.
  2. ^ "ChemIDplus — Potassium bromide". chem.sis.nlm.nih.gov. Archived from the original on 12 August 2014. Retrieved 11 August 2014.
  3. ^ "Labchem MSDS, sec. 16, p. 6" (PDF). Archived (PDF) from the original on 18 December 2021. Retrieved 27 November 2018.