Quecksilberdibromid

Bezeichnung:Quecksilberdibromid

CAS-Nr7789-47-1

Englisch Name:MERCURIC BROMIDE

CBNumberCB7759000

SummenformelBr2Hg

Molgewicht360.4

MOL-Datei7789-47-1.mol

Synonyma

Quecksilberdibromid

Quecksilberdibromid physikalisch-chemischer Eigenschaften

Schmelzpunkt	236 °C(lit.)
Siedepunkt	322 °C(lit.)
chüttdichte	1450kg/m3
Dichte	6.1
Dampfdruck	1 mm Hg ( 136.5 °C)
Flammpunkt	322-325°C subl.
storage temp.	Poison room
Löslichkeit	Soluble in hot alcohol, methanol, HCl, HBr
Aggregatzustand	beads
Wichte	6.109
Farbe	White
PH	4.5 (20°C, 5g/L in H2O)
Wasserlöslichkeit	g/100g solution H2O: 0.3 (0°C), 0.611±0.002 (25°C), 4.7 (100°C) [KRU93]; very soluble hot alcohol, methanol, HCl, HBr; slightly soluble chloroform [MER06]
Sensitive	Light Sensitive
Merck	14,5875
Solubility Product Constant (Ksp)	pKsp: 19.21
Stabilität	Stable, but may be light sensitive. Incompatible with potassium and sodium.
CAS Datenbank	7789-47-1(CAS DataBase Reference)
EPA chemische Informationen	Mercury bromide (HgBr2) (7789-47-1)

Sicherheit

Kennzeichnung gefährlicher	T+,N
R-Sätze:	26/27/28-33-50/53
S-Sätze:	13-28-45-60-61
RIDADR	UN 1634 6.1/PG 2
WGK Germany	3
RTECS-Nr.	OV7415000
F	8
TSCA	Yes
HazardClass	6.1
PackingGroup	II
HS Code	28521000
Giftige Stoffe Daten	7789-47-1(Hazardous Substances Data)

Gefahreninformationscode (GHS)

MERCURIC BROMIDE Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R26/27/28:Sehr giftig beim Einatmen, Verschlucken und Berührung mit der Haut.
R33:Gefahr kumulativer Wirkungen.
R50/53:Sehr giftig für Wasserorganismen, kann in Gewässern längerfristig schädliche Wirkungen haben.
S-Sätze Betriebsanweisung:
S13:Von Nahrungsmitteln, Getränken und Futtermitteln fernhalten.
S28:Bei Berührung mit der Haut sofort abwaschen mit viel . . . (vom Hersteller anzugeben).
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn möglich, dieses Etikett vorzeigen).
S60:Dieses Produkt und sein Behälter sind als gefährlicher Abfall zu entsorgen.
S61:Freisetzung in die Umwelt vermeiden. Besondere Anweisungen einholen/Sicherheitsdatenblatt zu Rate ziehen.
Beschreibung
Mercuric Bromide is a crystalline solid. Molecular weight= 360.41;Boiling point=322℃; Freezing/Melting point=236℃. Hazard Identification (based on NFPA-704 M Rating System): Health 3, Flammability 0, Reactivity 0. Slightly soluble in water.
Chemische Eigenschaften
white crystalline powder
Chemische Eigenschaften
Mercuric Bromide is a crystalline solid
Verwenden
Mercury(II) bromide is used as a reagent in the Koenigs-Knorr reaction, which forms glycoside linkages on carbohydrates. It is also used to test for the presence of arsenic, as recommended by the Pharmacopoeia.
Verwenden
Medicine.
Definition
ChEBI: Mercury dibromide is a mercury coordination entity composed of mercury and bromine with the formula HgBr2.
Allgemeine Beschreibung
White rhombic crystals. Sensitive to light. Slightly soluble in water and denser than water. Severely toxic by inhalation and ingestion.
Air & Water Reaktionen
Slightly soluble in water.
Reaktivität anzeigen
MERCURIC BROMIDE is incompatible with acetylene, ammonia, chlorine dioxide, azides, calcium (amalgam formation), sodium carbide, lithium, rubidium, copper . Reacts with sodium azide to give mercury(II) azide, which is sensitive to shock, friction, and heat. Mixing with hydrazine salts in basic solution produced a heat or shock sensitive yellow precipitate [Annalen, 1899, 305, 191]. Reacts violently with chlorine trifluoride *with ignition often occurring.
Hazard
Toxic by inhalation, ingestion, and skin absorption; strong irritant.
Health Hazard
TOXIC; inhalation, ingestion or skin contact with material may cause severe injury or death. Contact with molten substance may cause severe burns to skin and eyes. Avoid any skin contact. Effects of contact or inhalation may be delayed. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.
Brandgefahr
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.). Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated.
reaction suitability
reagent type: catalyst
core: mercury
Sicherheitsprofil
A poison by ingestion, skin contact, and intraperitoneal routes. Vigorous reaction with indium at 35OC. Incompatible with sodmm and potassium. When heated to decomposition it emits very toxic fumes of Brand Hg. See also MERCURY COMPOUNDS and BROMIDES.
Synthese
Five parts of Hg are covered with 60 parts of H2O and allowed to react at 50 °C (vigorous stirring) with four parts of Br2 , which is added dropwise as long as no permanent color is formed. The solution is then brought to a boil, filtered hot, and placed in an ice bath to induce crystallization. The salt is dried at as low a temperature as possible. Purification is by careful double or triple sublimation from a porcelain dish heated on a sand bath and covered with a Petri dish. When very high purity is required (e.g., for conductivity measurements), it may be necessary to re - peat the sublimation several times more.
Hg + Br2 = HgBr2
mögliche Exposition
This compound has applications in medicine.
Erste Hilfe
If this chemical gets into the eyes, remove any contact lenses at once and irrigate immediately for at least 15 min, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts the skin, remove contaminated clothing and wash immediately with soap and water. Seek medical attention immediately. If this chemical has been inhaled, remove from exposure, begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR if heart action has stopped. Transfer promptly to a medical Mercuric bromide 1683 facility. When this chemical has been swallowed, get medical attention. Give large quantities of water and induce vomiting. Do not make an unconscious person vomit. Medical observation is recommended for 2448 h after breathing overexposure, as pulmonary edema may be delayed. As first aid for pulmonary edema, a doctor or authorized paramedic may consider administering a corticosteroid spray. Antidotes and special procedures for medical personnel: The drug NAP (n-acetyl penicillamine) has been used to treat mercury poisoning, with mixed success. Note to physician: For severe poisoning BAL [British AntiLewisite, dimercaprol, dithiopropanol (C3H8OS2)] has been used to treat toxic symptoms of certain heavy metals poisoning including mercury. Although BAL is reported to have a large margin of safety, caution must be exercised, because toxic effects may be caused by excessive dosage. Most can be prevented by premedication with 1-ephedrine sulfate (CAS: 134-72-5).
Lager
Color Code—Blue: Health Hazard/Poison: Store in a secure poison location. Prior to working with this chemical you should be trained on its proper handling and 1684 Mercuric bromide storage. Store in tightly closed containers in a cool, wellventilated area away from light, heat, and acids. Mercuric bromide must be stored to avoid contact with sodium and potassium, since violent reactions occur.
Versand/Shipping
UN1634 Mercuric bromides, Hazard Class: 6.1; Labels: 6.1-Poisonous materials
läuterung methode
Crystallise it from hot saturated ethanolic solution, dry and keep it at 100o for several hours under a vacuum, then sublime it. [Garrett J Am Chem Soc 61 2744 1939.] Its solubility in H2O is 0.6% at 20o, and 22% at 100o; in EtOH it is 30% at 25o; and in MeOH it is 69.6% at 25o. [Wagenknecht & Juza Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol II p 1109 1965.] POISONOUS.
Inkompatibilitäten
Violent reaction with active metals; potassium, sodium. Store away from heat and light

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