Mercury (II) bromide
Structural formula | ||||||||||||||||
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General | ||||||||||||||||
Surname | Mercury (II) bromide | |||||||||||||||
other names |
Mercury dibromide |
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Molecular formula | HgBr 2 | |||||||||||||||
Brief description |
white, odorless solid |
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External identifiers / databases | ||||||||||||||||
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properties | ||||||||||||||||
Molar mass | 360.41 g mol −1 | |||||||||||||||
Physical state |
firmly |
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density |
6.05 g cm −3 (25 ° C) |
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Melting point |
238 ° C |
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boiling point |
319 ° C |
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Vapor pressure |
3 h Pa (150 ° C) |
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solubility |
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safety instructions | ||||||||||||||||
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MAK |
0.1 mg m −3 |
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As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
Mercury (II) bromide is a chemical compound from the group of bromides and mercury halides .
Extraction and presentation
Mercury bromide can be prepared directly from the elements in the presence of water or by reaction of mercury (I) bromide with mercury:
properties
Mercuric bromide is used as a reagent in the Koenigs-Knorr method used, for the synthetic preparation of glycosides of monosaccharides - derivatives is used.
It is also used to detect arsenic , which is first converted into arsine in the sample by reacting with hydrogen and then reacting with the mercury bromide:
The white mercury bromide turns yellow, brown or black if arsenic is present in the sample.
safety instructions
Mercury bromide is very toxic and harmful to the environment. It reacts violently, sometimes explosively, with potassium and sodium .
Individual evidence
- ↑ a b c Data sheet Mercury (II) bromide (PDF) from Merck , accessed on June 15, 2017.
- ↑ a b c d e f g h Entry on mercury (II) bromide in the GESTIS substance database of the IFA , accessed on February 1, 2016(JavaScript required) .
- ↑ Dimethyl Sulfoxide (DMSO) Solubility Data. Gaylord Chemical Company, LLC; Bulletin 102, June 2014, p. 14. (PDF)
- ↑ Not explicitly listed in Regulation (EC) No. 1272/2008 (CLP) , but with the specified labeling falls under the group entry inorganic compounds of mercury with the exception of mercuric sulphide and those specified elsewhere in this Annex in the Classification and Labeling Inventory of European Chemicals Agency (ECHA), accessed on February 1, 2016. Manufacturers or distributors can expand the harmonized classification and labeling .
- ↑ Methodicum Chimicum: Preparation of Transition Metal Derivatives, ISBN 0-124-60708-X
- ↑ mercury . In: Heinrich August Pierer , Julius Löbe (Hrsg.): Universal Lexicon of the Present and the Past . 4th edition. tape 13 . Altenburg 1861, p. 747-754 ( zeno.org ).
- ↑ Derek Horton: Advances in Carbohydrate Chemistry and Biochemistry . 2004, ISBN 0-120-07259-9 .
- ^ Robert V. Stick: Carbohydrates: The Sweet Molecules of Life . 2001, ISBN 0-126-70960-2 .
- ^ Ole Pederson: Pharmaceutical Chemical Analysis . 2006, ISBN 0-849-31978-1 .
- ↑ arsenic test (PDF; 39 kB)
- ↑ Nancy Odegaard, Alyce Sadongei: Old Poisons, New problem. 2005, ISBN 0-759-10515-4 .
- ↑ Timothy G. Townsend, Helena Solo-Gabriele: Environmental Impacts of Treated Wood. 2006, ISBN 0-849-36495-7 .