Mercury(II) bromide
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| Names | |
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| IUPAC name
Mercury(II) bromide
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| Other names
Mercuric bromide
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| Identifiers | |
| ECHA InfoCard | 100.029.245 |
PubChem CID
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CompTox Dashboard (EPA)
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| Properties | |
| HgBr2 | |
| Molar mass | 360.41 g/mol |
| Appearance | white solid |
| Density | 6.03 g/cm3, solid |
| Melting point | 237 °C (459 °F; 510 K) |
| Boiling point | 322 °C (612 °F; 595 K) |
| 22 g/100 mL (25°C) | |
| Solubility | 30 g/100 mL (25°C) ethanol |
| −94.2·10−6 cm3/mol | |
| Structure | |
| rhombic | |
| Hazards | |
| GHS labelling:[1] | |
  
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| Danger | |
| H300, H310, H330, H373, H410 | |
| P260, P262, P264, P270, P271, P273, P280, P284, P301+P310, P302+P350, P304+P340, P310, P314, P320, P321, P322, P330, P361, P363, P391, P403+P233, P405, P501 | |
| NFPA 704 (fire diamond) | |
| Flash point | Non-flammable |
| Related compounds | |
Other anions
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Mercury(II) fluoride Mercury(II) chloride Mercury(II) iodide |
Other cations
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Zinc bromide Cadmium bromide Mercury(I) 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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Mercury(II) bromide or mercuric bromide is the inorganic compound with the formula HgBr2. This white solid is a laboratory reagent. Like all mercury salts, it is highly toxic.
Preparation
Mercury(II) bromide can be produced by reaction of metallic mercury with bromine.[2]
Reactions
Mercury(II) bromide is used as a reagent in the Koenigs–Knorr reaction, which forms glycoside linkages on carbohydrates.[3][4]
It is also used to test for the presence of arsenic, as recommended by the Pharmacopoeia.[5] The arsenic in the sample is first converted to arsine gas by treatment with hydrogen. Arsine reacts with mercury(II) bromide:[6]
The white mercury(II) bromide will turn yellow, brown, or black if arsenic is present in the sample.[7]
Mercury(II) bromide reacts violently with elemental indium at high temperatures[8] and, when exposed to potassium, can form shock-sensitive explosive mixtures.[9]
References
- ^ "Mercuric bromide". PubChem. National Center for Biotechnology Information. Retrieved 2021-11-25.
- ^ F. Wagenknecht; R. Juza (1963). "Mercury(II) bromide". In G. Brauer (ed.). Handbook of Preparative Inorganic Chemistry, 2nd Ed. Vol. 2. NY, NY: Academic Press. p. 1109.
- ^ Horton, Derek (2004), Advances in Carbohydrate Chemistry and Biochemistry, Amsterdam: Elseveir Academic Press, p. 76, ISBN 0-12-007259-9, retrieved 2008-05-29
- ^ Stick, Robert V. (2001), Carbohydrates: The Sweet Molecules of Life, San Diego: Academic Press, p. 125, ISBN 0-12-670960-2, retrieved 2008-05-29
- ^ Pederson, Ole (2006), Pharmaceutical Chemical Analysis, Boca Raton, Florida: CRC Press, p. 107, ISBN 0-8493-1978-1, retrieved 2008-05-29
- ^ Odegaard, Nancy; Sadongei, Alyce (2005), Old Poisons, New Problems, Rowman Altamira, p. 58, ISBN 0-7591-0515-4, retrieved 2008-05-29
- ^ Townsend, Timothy G.; Solo-Gabriele, Helena (2006), Environmental Impacts of Treated Wood, Boca Raton, Florida: CRC Press, p. 339, ISBN 0-8493-6495-7, retrieved 2008-05-29
- ^ Bretherick, L.; Urben, P. G.; Pitt, Martin John (1999), Bretherick's Handbook of Reactive Chemical Hazards, Elseveir Academic Press, p. 110, ISBN 0-7506-3605-X
- ^ Bretherick, L.; Urben, P. G.; Pitt, Martin John (1999), Bretherick's Handbook of Reactive Chemical Hazards, Elseveir Academic Press, p. 1276, ISBN 0-7506-3605-X
| Authority control databases: National |
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