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Iron Pyrite (FeS₂)

Iron pyrite (FeS₂), Iron (IV) Sulfide is a powder that appears as a fine, yellowish-brown powder. It is insoluble in water and acids, but can react with oxygen and moisture to form sulfuric acid, which can cause environmental problems when exposed to air and water. Iron pyrite can also release toxic sulfur dioxide fumes when heated or burned. Sulfex is prepared from carefully selected pure monocrystalic iron pyrites (FeS₂) and consists of finely grained pyrite crystal splinters, increasing the thermal conductivity and tensile strength of the porosity of resin-bonded grinding wheels and cut-off wheels. It can be used alone or with other active fillers in organic bonded abrasives.
Typical Chemical Analysis

SULFEX® 600:
S: 44% | Fe: 38%

S 45% +/- 2% | Fe 35% +/- 2%

S 50% +/- 2% | Fe 44% +/- 2%

S 50% +/- 2% | Fe 44% +/- 2%

Laser Granulometry

SULFEX® 600:
D50 10 μm max
D90 15 μm max

> 500 micron max 10%
< 106 micron max 30% SULFEX® RED: D10 8 μm max D50 25 μm max D90 60 μm max SULFEX® YELLOW D10 15 μm max D50 125 μm max D90 300 μm max

Typical Applications

Iron pyrite has a variety of industrial applications in many industries. Iron pyrite powder can be used as a raw material in producing sulfuric acid, sulfur dioxide, and iron sulfate and can be used as a catalyst. Iron pyrite powder can be used as a semiconductor material to produce solar cells. It also can be used as an aggregate in concrete. SULFEX Iron Pyrite FeS₂ powders have specific use as a grinding-active filler in resin-bonded grinding wheels and cut-off wheels, brake linings, etc.

Packaging Options

25 kg. paper bags, poly-lined fiber drums, super sacks, and loose bulk


Iron Pyrite TSCA (SARA Title III) Status: Unknown
For further information, please call the EPA Office of Chemical Safety and Pollution Prevention (OCSPP) at 202-564-2902.
Iron Pyrite CAS Number: 12068-85-8
Iron Pyrite (FeS₂) UN Number: 3178

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  • SULFEX® 600


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