Antimony, atomic no.: 51, symbol as In, weight at 121.76, is an extremely brittle metal of a flaky, crystalline texture. It is bluish white and has a metallic lustre. It is not acted on by air at room temperature, but burns brilliantly when heated with the formation of white fumes. It is a poor conductor of heat and electricity.
Antimony and its compounds are toxic. It is found mostly with other minerals and in stibnite.
Antimony is found in nature in a number of minerals including stibnite (Sb2S3) and ullmanite (NiSbS). Small amounts of native antimony have been found. Some ores are treatable under reducing conditions to form Sb2S3. The sulphide is removed to leave elemental antimony with scrap iron. Sb2S3 + 3Fe → 2Sb + 3FeS
In another process, some ores can be heated to evolve the oxide Sb2O3 and this in turn can be reduced by charcoal in the presence of sodium sulphate, to ensure mixing, to form elemental antimony. ?2Sb2O3 +3C → 4Sb + 3CO2
Products available
Product Name
Formula
Grade
Description
Applications
Antimony Metal (ingot, pellet,powder)
Sb
99.65%
99.85%
99.90%
silvery lustrous gray
Alloys;
electronics
Antimony Trioxide
Sb2O3
99.0%
99.5%
99.8%
99.9%
white solid
Flame-proofing
Standard Specifications
AntimonyMetall is increasingly being used in the semiconductor industry in the production of diodes, infrared detectors, and Hall-effect devices. As an alloy, this metalloid greatly increases lead's hardness and mechanical strength. The most important use of antimony is as a hardener in lead for storage batteries.
Code
Sb
As
Fe
S
Cu
Se
Total
(%) min.
(%) max.
Sb-2
99.65
0.10
0.03
0.06
0.05
0.005
0.35
Sb-1
99.85
0.05
0.02
0.04
0.015
0.004
0.15
Sb-0
99.90
0.02
0.01
0.008
0.010
0.003
0.10
Antimony Trioxidethe main application is for flame retardants in combination with halogenated materials. The combination of the halides and the antimony being key to the frame-retardant action for polymers, helping to form less flammable chars. Such flame retardants are found in electrical apparatus, textiles, and coatings. It is also widely used in the industries such as glass, enamel, paint, catalyst, metallurgy, chemical, etc..
Symbol
Sb2O399.90
Sb2O399.80
Sb2O399.50
Chemical
components
Sb2O3≥
99.90
99.80
99.50
As2O3≤
0.02
0.05
0.06
PbO≤
0.04
0.08
0.10
Fe2O3≤
0.002
0.005
0.006
CuO≤
0.001
0.002
0.002
Se≤
0.002
0.004
0.005
Physical
Whiteness
%≥
93
Average
Particle
size
(DK)
μm
Sterny Grade≥
2.5
Fine Grade≤
1.6
Super Fine Grade≤
0.9
Tiny Grade≤
0.4
Specific
surface
Area
(REY)
m2/g
Sterny Grade
—
Fine Grade
—
Super Fine Grade≥
4.2
Tiny Grade≥
10.0
51
Sb
121.76
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Minor Metals
