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Bismuth 7440-69-9


Product Name: Bismuth

CAS: 7440-69-9

MF: Bi

MW: 208.98

EINECS: 231-177-4

Melting point:271 °C(lit.)

Boiling point:1560 °C(lit.)

Density:9.8 g/mL at 25 °C(lit.)

Vapor pressure:<0.1 mm Hg ( 20 °C)

Storage temp:Flammables area


Color:Silver-white or red

Specific Gravity:9.80

Water Solubility:insoluble



Index Model XLBi.3.5N XLBi.4N XLBi.4.7N
Purity(%,min) 99.95 99.99 99.997
Molecular formula Bi Bi Bi
Appearance Grey black powder Grey black powder Grey black powder
Impurities %(Max) %(Max) %(Max)
Cu 0.003 0.001 0.0003
Pb 0.008 0.001 0.0007
Zn 0.005 0.005 0.0001
Fe 0.001 0.001 0.0005
Ag 0.015 0.004 0.0005
As 0.001 0.0003 0.0003
Sb 0.001 0.0005 0.0003
Te 0.001 0.0003
Cl 0.004 0.0015
Sn 0.0002
Cd 0.0001
Hg 0.00005
Ni 0.0005
Particle Size(mesh) -100 -200 -325


It is widely used in various bismuth alloy products, low-temperature solders, metallurgy additives, and petroleum exploration.


It should be stored in a cool, ventilated, dry and clean warehouse.


It is stable at normal temperature, and burns in a light blue flame when heated, and produces yellow or brown bismuth oxide.

The volume of the molten metal increases after being condensed.

Avoid contact with oxides, halogens, acids, and interhalogen compounds.

It is insoluble in hydrochloric acid when there is no air, and it can be dissolved slowly when air is passed in.

The volume increases from liquid to solid, and the expansion rate is 3.3%.

It is brittle and easily crushed, and has poor electrical and thermal conductivity.

It can react with bromine and iodine when heated.

At room temperature, bismuth does not react with oxygen or water, and can burn to produce bismuth trioxide when heated above the melting point.

Bismuth selenide and telluride have semiconducting properties.