Hydrobromic acid
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| Hydrobromic acid | |
|---|---|
 |
|
| General | |
| Molecular formula | HBr |
| Molar mass | 80.91 g/mol |
| Appearance | colorless liquid |
| CAS number | [10035-10-6] |
| Properties | |
| Density and phase | variable |
| Solubility in water | aqueous solution |
| Melting point | variable |
| Boiling point | variable |
| Acidity (pKa) | −9 |
| Hazards | |
| MSDS | External MSDS |
| EU classification | Corrosive (C) |
| NFPA 704 |
0
3
0
|
| R-phrases | R34, R37 |
| S-phrases | S1/2, S7/9, S26, S45 |
| Flash point | non flammable |
| RTECS number | MW3850000 |
| Supplementary data page | |
| Structure and properties |
n, εr, etc. |
| Thermodynamic data |
Phase behaviour Solid, liquid, gas |
| Spectral data | UV, IR, NMR, MS |
| Related compounds | |
| Other anions | Hydrofluoric acid Hydrochloric acid Hydroiodic acid |
| Related compounds | Hydrogen bromide |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references |
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Hydrobromic Acid is formed by dissolving the diatomic molecule hydrogen bromide in water. It has a pKa of −9, making it a stronger acid than hydrochloric acid, but not as strong as hydroiodic acid. Hydrobromic acid is one of the strongest mineral acids known. (See strong acid.)
Contents |
[edit] Uses
Hydrobromic acid is mainly used for the production of inorganic bromides, cleaving alkoxy and phenoxy compounds, substitution of hydroxyl groups, and the hydrobromination of alkenes. It also catalyzes alkylation reactions and the extraction of certain ores.1
[edit] Syntheses
Hydrobromic acid can be prepared in the laboratory via the reaction of Br2, SO2, and water.2 More typically laboratory preparations involve the production of anhydrous HBr, which is then dissolved in water.
Hydrobromic acid has commonly been prepared industrially by reacting bromine with either sulfur or phosphorus and water. However, it can also be produced electrolytically.2
Hydrobromic acid is available in various concentrations and purities.
[edit] References
(1) Carlin, W. W. U.S. Patent 4,147,601, April 3, 1979.
(2) Scott, A. (1900) Preparation of pure hydrobromic acid. J. Chem. Soc. Trans., 648-650.
[edit] External links
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