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Barium Sulfate (BaSO₄)

Barium Sulfate (BaSO₄), otherwise known as Blanc Fixe, is a heavy, white insoluble powder that is odorless and tasteless. It has a strong ability for absorbing X-rays, with X-rays being impermeable to it.

Purity 92.0% to 99.0%
Typical Applications

Barium sulfate has many commercial applications. It is used to produce fine pigment particles of uniform size, known as “blanc fixe”. It has been used as a drilling fluid, as a pigment in paints, and as a filler in plastics to improve the resistance against acid and acidity. It is also used in heat-reflecting paint, rubber, glass, and paper manufacturing, as well as in radiometric measurements. It is also used in medicine clinically as a radiocontrast agent for X-ray imaging and other diagnostic procedures and cosmetics as a sunscreen, amongst other applications.

Packaging Options

Drums, bags, and bulk bags.


Barium Sulfate TSCA (SARA Title III) Status: Listed
Please contact the EPA Office of Chemical Safety and Pollution Prevention (OCSPP) at 202-564-2902.\
Barium Sulfate CAS Number: 7727-43-7
Barium Sulfate UN Number: 1564

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