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LEAD(II) BROMIDE

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LEAD(II) BROMIDE Basic information

Product Name:
LEAD(II) BROMIDE
CAS:
10031-22-8
MF:
Br2Pb
MW:
367.01
EINECS:
233-084-4
Mol File:
10031-22-8.mol
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LEAD(II) BROMIDE Chemical Properties

Melting point:
371 °C(lit.)
Boiling point:
892 °C(lit.)
Density 
6.66 g/mL at 25 °C(lit.)
solubility 
ethanol: insoluble(lit.)
form 
Powder
Specific Gravity
6.66
color 
White to off-white
Water Solubility 
Soluble in water at 20°C 5g/L. Insoluble in ethanol. Solubility in N,N-DMF is almost transparent.
Merck 
14,5403
Solubility Product Constant (Ksp)
pKsp: 6.82
Stability:
Stable.
InChIKey
ZASWJUOMEGBQCQ-UHFFFAOYSA-L
CAS DataBase Reference
10031-22-8(CAS DataBase Reference)
EPA Substance Registry System
Lead(II) bromide (10031-22-8)
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Safety Information

Hazard Codes 
T,N
Risk Statements 
61-20/22-33-50/53-62
Safety Statements 
53-45-60-61
RIDADR 
UN 2291 6.1/PG 3
WGK Germany 
3
TSCA 
Yes
HazardClass 
6.1
PackingGroup 
III
HS Code 
28275900

MSDS

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LEAD(II) BROMIDE Usage And Synthesis

Physical Properties

White orthorhombic crystals; density 6.66 g/cm3; melts at 373°C; forms a horn-like mass on solidification; vaporizes at 916°C; decomposes slowly on exposure to light; sparingly soluble in cold water (4.55 g/L at 0°C and 8.44 g/L at 20°C, respectively); moderately soluble in boiling water (44.1g/L at 100°C); Ksp 6.60x10–6 at 25°C; insoluble in alcohol; slightly soluble in ammonia; soluble in alkalies and also in sodium or potassium bromide solutions.

Uses

Lead(II) bromide is used for developing images in photography; as inorganic filler in fire-retardant plastics; as a photopolymerization catalyst for acrylamide monomer; and as a welding flux for welding aluminum or its alloys to other metals.

Preparation

Lead bromide is prepared by treating an aqueous solution of lead nitrate with hydrobromic acid or with sodium or potassium bromide:
Pb2+ + 2Br¯ → PbBr2
The solution is allowed to stand to let the precipitate settle.
The compound also may be obtained by adding lead carbonate or lead monoxide to hydrobromic acid.

Toxicity

Moderately toxic by ingestion. The toxic effects are those of lead.

Chemical Properties

white, ortho-rhomb crystal(s); -80 mesh with 99.999% purity; enthalpy of vaporization 133 kJ/mol; enthalpy of fusion 16.44 kJ/mol; obtained from PbO or PbCO3 and HBr; finds use as a photopolymerization catalyst and in photoduplication processes in the 365 nm region [KIR78] [CER91] [CRC10] [MER06]

Physical properties

White orthorhombic crystals; density 6.66 g/cm3; melts at 373°C; forms a horn-like mass on solidification; vaporizes at 916°C; decomposes slowly on exposure to light; sparingly soluble in cold water (4.55 g/L at 0°C and 8.44 g/L at 20°C, respectively); moderately soluble in boiling water (44.1g/L at 100°C); Ksp 6.60x10-6 at 25°C; insoluble in alcohol; slightly soluble in ammonia; soluble in alkalies and also in sodium or potassium bromide solutions.

Uses

Lead bromide is used for developing images in photography; as inorganic filler in fire-retardant plastics; as a photopolymerization catalyst for acrylamide monomer; and as a welding flux for welding aluminum or its alloys to other metals.

Purification Methods

Crystallise it from water containing a few drops of HBr (25mL of water per gram PbBr2) between 100o and 0o. A neutral solution is evaporated at 110o, and the crystals that separate are collected by rapid filtration at 70o and dried at 105o (to give the monohydrate). Its solubility in H2O is 0.5% (at ~10o) and 5% (at ~ 100o). To prepare the anhydrous bromide, the hydrate is heated for several hours at 170o and then in a Pt boat at 200o in a stream of HBr and H2. Finally it is fused [Clayton et al. J Chem Soc, Faraday Trans 1 76 2362 1980].

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LEAD(II) BROMIDESupplierMore

J & K SCIENTIFIC LTD.
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400-610-6006
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Dr. J. Pharmachem (India)
Tel:
+91 20 24332987
Email:
info@jpharmachem.com
Basic information Physical Properties Uses Preparation Toxicity Safety Related Supplier