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Stannic Oxide (SnO2)

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Specification

Assay (as SnO2) 99.90% minimum
Lead (Pb) 0.05% maximum
Iron (Fe) 0.015% maximum
Copper (Cu) 0.002% maximum
Bismuth (Bi) 0.015% maximum
Antimony (Sb) 0.015% maximum
Nickel (Ni) 0.005% maximum
Cobalt (Co) 0.005% maximum
Zinc (Zn) 0.005% maximum
Cadmium (Cd) 0.005% maximum
SiO2 0.005% maximum
Al 0.005% maximum

Stannic oxide is derived from tin. Widely known and used, tin comprises about 0.001 percent of the earth's crust. It is sometimes found alone, but generally is found as the oxide in the mineral cassiterite. Tin mines exist in England, Spain, Indonesia, Thailand, Zaire, Nigeria and China. Significant amounts of tin is also obtained through recycling. Tin is nontoxic, ductile, malleable, adheres to various metals and has a relatively low melting point. These properties lend to its usefulness as a rust-proofing material on iron, low-grade steels, copper, and copper alloys.

Historical Background

Tin is a metal long known and used throughout the world. It was known in ancient times--think Bronze Age--as a component of bronze which it forms in combination with copper. Tin has broad uses in industry, including food preservation and canning,

Stannic Oxide

Tin forms two series of compounds, termed stannous and stannic. One of the most important compounds commercially is stannic oxide, which is useful as a catalyst in industrial processing, in ceramics and as a polishing powder for steel.

If you believe you have a use for stannic oxide, contact us. We will be happy to discuss and help you implement your application.

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