Hydrobromic acid

Hydrobromic acid
Ball-and-stick model of hydrogen bromide	Ball-and-stick model of water
Ball-and-stick model of the bromide anion	Ball-and-stick model of the hydronium cation
Names
	IUPAC name Bromane
	Other names Hydronium bromide ; Bromhydric acid
Identifiers
CAS Number	10035-10-6 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:47266 ;
ChEMBL	ChEMBL1231461;
ChemSpider	255 ;
ECHA InfoCard	100.240.772
EC Number	233-113-0;
Gmelin Reference	620
KEGG	C13645;
PubChem CID	260;
RTECS number	MW3850000;
UNII	3IY7CNP8XJ ;
UN number	1048 1788
	InChI InChI=1S/BrH/h1H Key: CPELXLSAUQHCOX-UHFFFAOYSA-N ; InChI=1/BrH/h1H Key: CPELXLSAUQHCOX-UHFFFAOYAZ;
	SMILES [OH3+].[Br-];
Properties
Chemical formula	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.)
Solubility in water	221 g/100 mL (0 °C) ; 204 g/100 mL (15 °C) ; 130 g/100 mL (100 °C)
Acidity (pKa)	−9
Viscosity	0.84 cP (−75 °C)
Thermochemistry
Heat capacity (C)	29.1 J/(K·mol)
Std molar; entropy (S⦵298)	198.7 J/(K·mol)
Std enthalpy of; formation (ΔfH⦵298)	−36.3 kJ/mol
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H314, H335
Precautionary statements	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)	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). verify (what is ?) Infobox references

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.

^ 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.
^ Bell, R. P. The Proton in Chemistry, 2nd ed., Cornell University Press, Ithaca, NY, 1973.

[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.

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