BISMUTH OXIDE

PRODUCT IDENTIFICATION

CAS NO. 1304-76-3

BISMUTH OXIDE 

EINECS NO. 215-134-7
FORMULA Bi2O3
MOL WT. 465.96

H.S. CODE

 

TOXICITY

 
SYNONYMS Bismuth sesquioxide; Bismuth trioxide; Bismuth(3+) oxide;
Bismuth Yellow; Bismuth sesquioxide; Bismuth(III) oxide; Bismuthous oxide; Bismutum-oxydatum; Other CAS RN.: 11090-09-8; 163831-49-0; 477850-83-2;
DERIVATION

 

CLASSIFICATION

 

PHYSICAL AND CHEMICAL PROPERTIES

PHYSICAL STATE yellow powder
MELTING POINT 817 C
BOILING POINT

1890 C

RELATIVE DENSITY 2.65
SOLUBILITY IN WATER

Insoluble

pH  
VAPOR DENSITY

 

REFRACTIVE INDEX

 

NFPA RATINGS

Health: 1 Flammability: 1 Reactivity: 0

AUTOIGNITION

 

FLASH POINT

 

STABILITY Stable under normal conditions.

GENERAL DESCRIPTION & APPLICATIONS

Bismuth,  a silver-white metal, atomic number 83, atomic weight 208.980, is the most metallic element in the group 15 in the periodic table. Though the principal deposits are in ores, the primary source of bismuth is as a by-product in refining of copper and lead ores. Of all the metals, bismuth is the most diamagnetic and has the lowest thermal conductivity except mercury. Bismuth has a high electrical resistance and the highest Hall coefficient. Elemental bismuth like antimony and water is the substances of which the liquid phase is denser than its solid phase. The field of application of our bismuth-based chemicals is found in ceramic materials, pharmaceuticals, cosmetics, and automobile industry to reduce the levels of lead. Bismuth telluride (Bi2Te3) and bismuth selenide (Bi2Se3) are used in thermoelectric equipment for refrigeration. Bismuth phosphomolybdate (BiPMo12O40) is a highly effective catalyst for the preparation of acrylonitrile, which is the  raw materials of acrylic fibres, plastics, and paints. Bismuth chemicals are used in cosmetics for shiny look in eye shadow, nail varnish and lipstick due to metallic and pearlescent effect. Salts of bismuth have astringent, antacid, and mildly germicidal properties and are used to treat diarrhea, nausea, indigestion, and other gastrointestinal conditions, They are used as a positive contrast agent in X-ray examination.

Bismuth trioxide is used in the production of superconductors and electronic components. Relatively environment-friendly Bismuth trioxide is substituting for toxic lead oxide in the production of glass, ceramics, fireworks and batteries. There is an advantage that bismuth trioxide lowers the processing temperature of ceramics.

SALES SPECIFICATION

APPEARANCE

yellow powder

CONTENT

99.5% min

LOSS ON DRYING

1.0% max

CHLORIDE

200ppm max

COPPER

30ppm max

LEAD

20ppm max

ARSENIC

2ppm max

SULFATE

200ppm max

ALKALINE EARTHS

0-.5% max

NITRATE

100ppm max
TRANSPORTATION
PACKING
 
HAZARD CLASS  
UN NO.

 

OTHER INFORMATION
Hazard Symbols: XI, Risk Phrases: 36/37/38, Safety Phrases: 26-36/37