Hydrobromic acid

Hydrobromic acid
Ball-and-stick model of hydrogen bromide
Ball-and-stick model of hydrogen bromide
Ball-and-stick model of water
Ball-and-stick model of water
Ball-and-stick model of the bromide anion
Ball-and-stick model of the bromide anion
Ball-and-stick model of the hydronium cation
Ball-and-stick model of the hydronium cation
Names
IUPAC name
Bromane[1]
Other names
Hydronium bromide
Bromhydric acid
Identifiers
3D model (JSmol)
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.240.772 Edit this at Wikidata
EC Number
  • 233-113-0
620
KEGG
RTECS number
  • MW3850000
UNII
UN number 1048 1788
  • InChI=1S/BrH/h1H checkY
    Key: CPELXLSAUQHCOX-UHFFFAOYSA-N checkY
  • InChI=1/BrH/h1H
    Key: CPELXLSAUQHCOX-UHFFFAOYAZ
  • [OH3+].[Br-]
Properties
HBr(aq)
Molar mass 80.91 g·mol−1
Appearance colorless liquid
(impure samples can appear yellowish)
Odor acrid
Density 1.49 g/cm3 (48% w/w aq.)
Melting point −11 °C (12 °F; 262 K) (47–49% w/w aq.)
Boiling point 122 °C (252 °F; 395 K) at 700 mmHg (47–49% w/w aq.)
221 g/100 mL (0 °C)
204 g/100 mL (15 °C)
130 g/100 mL (100 °C)
Acidity (pKa) −9[2]
Viscosity 0.84 cP (−75 °C)
Thermochemistry
29.1 J/(K·mol)
198.7 J/(K·mol)
−36.3 kJ/mol
Hazards
GHS labelling:
GHS05: CorrosiveGHS07: Exclamation mark
Danger
H314, H335
P260, P261, P264, P271, P280, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P312, P321, P363, P403+P233, P405, P501
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gasFlammability 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 hazard ACID: Acid
3
0
0
ACID
Flash point Non-flammable
Safety data sheet (SDS) ICSC 0282
Related compounds
Other anions
 Hydrofluoric acid
Hydrochloric acid
Hydroiodic acid
Related compounds
 Hydrogen 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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Hydrobromic acid is an aqueous solution of hydrogen bromide. It is a strong acid formed by dissolving the diatomic molecule hydrogen bromide (HBr) in water. "Constant boiling" hydrobromic acid is an aqueous solution that distills at 124.3 °C (255.7 °F) and contains 47.6% HBr by mass, which is 8.77 mol/L. Hydrobromic acid is one of the strongest mineral acids known.

  1. ^ Favre, Henri A.; Powell, Warren H., eds. (2014). Nomenclature of Organic Chemistry: IUPAC Recommendations and Preferred Names 2013. Cambridge: The Royal Society of Chemistry. p. 131. ISBN 9781849733069.
  2. ^ Bell, R. P. The Proton in Chemistry, 2nd ed., Cornell University Press, Ithaca, NY, 1973.