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Bismuth oxide (Bi2O3)

Bismuth oxide (Bi2O3) structure

CAS No:
1304-76-3
Formula:
Bi2O3
Chemical Name:
Bismuth oxide (Bi2O3)
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
Categories:
Active Pharmaceutical Ingredients > Digestive System Drugs

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.

Bismuth oxide (Bi2O3) Basic Attributes

Molecular Weight：

256.98

Exact Mass：

465.94554 g/mol

EC Number：

215-134-7

HScode：

2825 90 85

Characteristics

PSA：

43.4 Å²

XLogP3：

-0.35640

Appearance：

Yellow powder

Density：

8.437 g/cm³

Melting Point：

270 °C

Boiling Point：

1890°C

Flash Point：

1890°C

Water Solubility：

H2O: INsoluble

Storage Conditions：

Store at +5°C to +30°C.

Toxicity：

Oral-rat LD50: 5000 mg/kg; Oral-Mouse LD50: 10000 mg/kg

Flammability characteristics：

Decomposition of toxic bismuth-containing fumes by heating

Safety Information

wgk germany：

hazard class code：

36/37/38-20/21/22

safety instructions：

26-36/37-36

RTECS Number：

EB2984460

Marks：

Xi,Xn

Storage features：

Warehouse ventilated, low temperature and dry

Stability/Shelf Life：

Stable.

GHS Classification：

Not Classified

Toxicity

Toxicity class：

practically nontoxic

Drug Information

MeSH Entry Terms：

bismuth oxide

Bismuth oxide (Bi2O3) Use and Manufacturing

Methods of 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.

Uses

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

Downstream Products

Carbon dioxide

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