| Identification | More | [Name]
Bismuth trioxide | [CAS]
1304-76-3 | [Synonyms]
BISMUTH(+3)OXIDE
BISMUTH(III) OXIDE
BISMUTH(III) OXIDE V
BISMUTH OXIDE
BISMUTH TRIOXIDE
Bi2-O3
Bismite
Bismuth oxide (Bi2O3)
Bismuth sesquioxide
Bismuth yellow
Bismuthous oxide
bismuthousoxide
bismuthoxide(bi2o3)
BISMUTHOXIDE,99.999%
bismuthsesquioxide
bismuthyellow
C.I. 77160
c.i.77160
Dibismuth trioxide
dibismuthtrioxide | [EINECS(EC#)]
215-134-7 | [Molecular Formula]
BiO3- | [MDL Number]
MFCD00003462 | [Molecular Weight]
256.98 | [MOL File]
1304-76-3.mol |
| Safety Data | Back Directory | [Hazard Codes ]
Xi,Xn | [Risk Statements ]
R36/37/38:Irritating to eyes, respiratory system and skin .
R20/21/22:Harmful by inhalation, in contact with skin and if swallowed . | [Safety Statements ]
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36/37:Wear suitable protective clothing and gloves .
S36:Wear suitable protective clothing . | [WGK Germany ]
2
| [RTECS ]
EB2984460
| [TSCA ]
Yes | [HS Code ]
28259021 | [Toxicity]
LD50 orally in Rabbit: 5000 mg/kg |
| Hazard Information | Back Directory | [Chemical Properties]
Bismuth(III) oxide is the compound produced by heating the metal, or its carbonate, in air. It is definitely a basic oxide, dissolving readily in acid solutions, and unlike the arsenic or antimony compounds, not amphiprotic in solution, although it forms stoichiometric addition compounds on heating with oxides of a number of other metals. It exists in three modifications, white rhombohedral, yellow rhombohedral, and gray-black cubical. Bismuth(II) oxide, BiO, has been produced by heating the basic oxalate. | [Chemical Properties]
Heavy, Yellow Powder | [Physical properties]
Yellow monoclinic crystal or powder; density 8.90 g/cm3; melts at 817°C; vaporizes at 1,890°C; insoluble in water; soluble in acids. | [Occurrence]
Bismuth trioxide occurs in nature as mineral bismite. The oxide is used in fireproofing of papers and polymers; in enameling cast iron ceramic; and in disinfectants. | [Uses]
In disinfectants, magnets, glass, rubber vulcanization; in fireproofing of papers and polymers; in catalysts. | [Preparation]
Bismuth trioxide is commercially made from bismuth subnitrate. The latter is produced by dissolving bismuth in hot nitric acid. Addition of excess sodium hydroxide followed by continuous heating of the mixture precipitates bismuth trioxide as a heavy yellow powder. Also, the trioxide can be prepared by ignition of bismuth hydroxide. | [General Description]
Bismuth (III) oxide is a yellow, monoclinic crystalline powder. It is insoluble in water and hydroxide solutions but dissolves in acids to form bismuth (III) salts. It can be prepared by heating bismuth in air or by heating hydroxides, carbonates or nitrates of bismuth. | [Structure and conformation]
Bismuth(III) Oxides are the deeply studied class of bismuth compounds, and they present four different phases. At room temperature, monoclinic α-Bi2O3 is the common stable phase with a polymeric-distorted layered structure composed of pentacoordinate bismuth atoms enclosed into pseudo-octahedral units. At a temperature higher than 710 °C, the α phase is converted into the cubic δ phase, which has a defective structure with random oxygen vacancies. The β phase and several oxygen-rich forms are closely related to the δ phase. In particular, the vacancy structures of highly defected bismuth oxides are some sites filled with O?2 and Bi(III) and Bi (V) sites. Bismuth oxide γ-phase also shows a cubic structure, but it is highly unstable and hard to synthesize without supporting it onto other oxides or metallic species. The other two polymorphic metastable bismuth oxide phases are known as the ω phase, stable at temperatures higher than 800 °C and the ε phase, isolated in 2006 by Cornei and co-workers[1].
| [References]
[1] Mattia Bartoli, Alberto Tagliaferro, Pravin Jagdale. “A Short Review on Biomedical Applications of Nanostructured Bismuth Oxide and Related Nanomaterials.” Materials 13 22 (2020).
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