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Topic summary

Hydrobromic acid

Hydrobromic acid
Names IUPAC name
Bromane
Other names
Hydronium bromide
Bromhydric acid
Identifiers
3D model (JSmol)
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard100.240.772EC Number
  • 233-113-0
620 KEGG
RTECS number
  • MW3850000
UNII
UN number1048 1788
  • InChI=1S/BrH/h1H
    Key: CPELXLSAUQHCOX-UHFFFAOYSA-N
  • InChI=1/BrH/h1H
    Key: CPELXLSAUQHCOX-UHFFFAOYAZ
  • [OH3+].[Br-]
Properties HBr(aq)Molar mass80.91 g·mol Appearance colorless liquid
(impure samples can appear yellowish) Odoracrid Density1.49 g/cm (48% w/w aq.) Melting point−11 °C (12 °F; 262 K) (47–49% w/w aq.) Boiling point122 °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 Viscosity0.84 cP (−75 °C) Thermochemistry 29.1 J/(K·mol) 198.7 J/(K·mol) −36.3 kJ/mol Hazards GHS labelling: DangerH314, H335P260, P264, P271, P280, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P312, P321, P363, P403+P233, P405, P501NFPA 704 (fire diamond)
3
0
0
ACID
Flash pointNonflammable Safety data sheet (SDS) ICSC 0282Related 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.

Wikipedia source