Bismuth oxide (Bi2O3)
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Bismuth oxide (Bi2O3)
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CAS No:
1304-76-3
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Formula:
Bi2O3
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Chemical Name:
Bismuth oxide (Bi2O3)
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Synonyms:
Bismuth oxide (Bi2O3);C.I. 77160;Bismuthous oxide;Bismuth trioxide;Bismuth yellow;Dibismuth trioxide;Bismuth sesquioxide;Bismuth oxide;Bismuth(3+) oxide;Bismuth(III) oxide;Bismuth sesquioxide (Bi2O3);Bismuth oxide (BiO1.5);NanoArc Bismuth Oxide;Nanotek;B 18401;11090-09-8;477850-83-2;163831-49-0
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CAS No:
Description
Bismuth oxide is an inorganic compound, odorless, stable in the air, with a molecular formula of Bi2O3. The pure products are α-type, β-type and δ-type. α-type is a yellow monoclinic crystal with a relative density of 8.9 and a melting point of 825 ℃. It is soluble in acid but insoluble in water and alkali; β-type is a bright yellow to orange tetragonal crystal with a relative density of 8.55 and a melting point of 860 ℃. It is soluble in acid but insoluble in water. It is easily reduced to metallic bismuth by hydrogen, hydrocarbons, etc.
Characteristics
43.4 Ų
-0.35640
Yellow powder
8.437 g/cm3
270 °C
1890°C
1890°C
H2O: INsoluble
Store at +5°C to +30°C.
Oral-rat LD50: 5000 mg/kg; Oral-Mouse LD50: 10000 mg/kg
Decomposition of toxic bismuth-containing fumes by heating
Safety Information
2
36/37/38-20/21/22
26-36/37-36
EB2984460
Xi,Xn
Warehouse ventilated, low temperature and dry
Stable.
Not Classified
Bismuth oxide (Bi2O3) Use and Manufacturing
To the bismuth nitrate solution (80-90°C), a sodium hydroxide aqueous solution containing no carbon dioxide was added dropwise and mixed. The solution remains alkaline during precipitation, forming a white, volume-expanding bismuth oxide hydrate Bi(OH)3 precipitate. This solution is heated and dehydrated into yellow bismuth trioxide after short stirring. After decantation and washing with water, filtration and drying, the finished bismuth oxide is prepared.
Bismuth oxide can be used to prepare bismuth salts, and can also be used as electronic ceramic powder materials, electrolyte materials, optoelectronic materials, and high-temperature superconducting materials. As an important additive in electronic ceramic powder materials, the purity of Bismuth oxide is generally required to be above 99.15%. Its main applications include zinc oxide varistors, ceramic capacitors, and ferrite magnetic materials.
Computed Properties
Molecular Weight:465.959
Hydrogen Bond Acceptor Count:3
Exact Mass:465.94554
Monoisotopic Mass:465.94554
Topological Polar Surface Area:43.4
Heavy Atom Count:5
Complexity:34.2
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes
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