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Cadmium bromide

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Cadmium bromide Basic information
Cadmium bromide Chemical Properties
  • Melting point:567°C
  • Boiling point:863°C
  • Density 5,192 g/cm3
  • Flash point:863°C
  • solubility Soluble in alcohol, ether, acetone and liquid ammonia.
  • form beads
  • color White to pale yellow
  • Specific Gravity5.192
  • Water Solubility Freely soluble in water, alcohol. Slightly soluble in acetone and ether.
  • Sensitive Hygroscopic
  • Merck 14,1615
  • Stability:Stable.
  • CAS DataBase Reference7789-42-6(CAS DataBase Reference)
  • EPA Substance Registry SystemCadmium bromide (7789-42-6)
Safety Information
  • Hazard Codes Xn,N
  • Risk Statements 20/21/22-50/53
  • Safety Statements 60-61
  • RIDADR UN 3077 9/PG 3
  • WGK Germany 3
  • RTECS EU9935000
  • 3-10
  • TSCA Yes
  • HazardClass 6.1
  • PackingGroup III
Cadmium bromide Usage And Synthesis
  • Chemical PropertiesWhite to yellowish crysatlline powder
  • Chemical PropertiesCadmium bromide is a white to yellowish crystalline powder.
  • Physical propertiesWhite to yellowish powder or flakes; hexagonal crystal system; hygroscopic; density 5.192g/cm3; melts at 568°C; vaporizes at 844°C; soluble in water, alcohol, ether, acetone, and liquid ammonia.
  • UsesMade by heating cadmium to redness in bromine vapor. The yellowish crystalline powder is soluble in water and alcohol and is slightly soluble in ether. The crystals are deliquescent and must be kept in a well-stoppered bottle. Like its iodide counterpart, cadmium bromide was used in collodion in conjunction with an iodide of either ammonium or potassium.
  • UsesThis compound is used in photography, engraving, and lithography. The other halogen elements also combine with cadmium in a similar ionic reaction as with bromine.
  • UsesProcess engraving, lithography and photography
  • UsesIn photography, process engraving, and lithography.
  • PreparationCadmium bromide is prepared by heating cadmium with bromine vapor. Also the compound can be prepared by the treatment of dry cadmium acetate with glacial acetic acid and acetyl bromide. Alternatively, it may be obtained by dissolving cadmium or cadmium oxide in hydrobromic acid and evaporating the solution to dryness under helium in an inert atmosphere.
  • General DescriptionOdorless white solid. Mixes with water.
  • Air & Water ReactionsWater soluble.
  • Reactivity ProfileCADMIUM BROMIDE has weak oxidizing or reducing powers. Redox reactions can however still occur. The majority of compounds in this class are slightly soluble or insoluble in water. If soluble in water, then the solutions are usually neither strongly acidic nor strongly basic. These compounds are not water-reactive.
  • Health HazardInhalation causes coughing, sneezing, symptoms of lung damage. Ingestion produces severe toxic symptoms; both kidney and liver injuries may occur. Contact with eyes causes irritation.
  • Fire HazardSpecial Hazards of Combustion Products: Toxic cadmium oxide fumes may form in fires.
  • Safety ProfileConfirmed human carcinogen. When heated to decomposition it emits toxic fumes of Cd and Br-.
  • Potential ExposureCadmium bromide is used in photography, engraving, and lithography
  • ShippingUN 2570 Cadmium compounds, Hazard Class: 6.1; Labels: 6.1-Poisonous materials, Technical Name Required
  • Purification MethodsCrystallise it from water (0.6mL/g) between 100o and 0o, and dry it at 110o. It forms the monohydrate below 36o and the tetrahydrate above 36o. [Wagenknecht & Juza in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol II p 1096 1965.]
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