A mineral substance with the chemical formula BaSO4 is called barium sulfate. This substance is a white solid, odorless and insoluble in water.
In fact, this substance is one of the most insoluble sulfate salts.
|233.38 g/mol||Molar mass|
|1,600 °C||Boiling point:|
|1,580 °C||Melting point|
|Insoluble in alcohol, soluble in concentrated, hot sulfuric acid||Solubility|
|0.2448 mg/100 mL (20 °C)
0.285 mg/100 mL (30 °C)
|Solubility in water|
Usually, most of the barium used commercially in industry is obtained from barite, which is very impure. This material is processed to produce barium sulfide:
BaSO4 + 4 C → BaS + 4 CO
To produce very pure barium sulfate, the sulfide or chloride is treated with sulfuric acid or sulfate salts:
BaS + H2SO4 → BaSO4 + H2S
In the laboratory, they make this substance from the combination of barium ion solutions and sulfate salts.
Applications of barium sulfate:
This combination has many applications in the industry, which we will examine below.
This compound is used as part of oil well drilling fluid and by increasing the fluid density, it increases the hydrostatic pressure in the well and reduces the probability of blowout.
It is used as a radio contrast agent for X-ray imaging and other procedures. This substance is usually prescribed orally in the form of fine powder in a thick solution. This substance is easily removed from the body and does not cause any problems. Due to the relatively high atomic number of barium, its compounds absorb X-rays more strongly.
This material use as a filler in polypropylene and polystyrene plastics at a ratio of 70%. Color indicators use for soil pH and other soil quality tests, although small particles such as clay can cloud the test mixture and make it difficult to see the color. When barium sulfate add to this test mixture, it binds to these particles and makes them heavier, leaving a clearer solution.
This material also use in colorimetry, brake pads, powder coatings, casting and radiometric measurements.
This substance, like any other chemical substance, can have side effects and requires consulting a doctor. Rare side effects of this substance as a medicine include constipation, bloating, nausea, heartache and shortness of breath. Also, anxiety, blurred vision, confusion, cough, bruises, hives, skin redness, sweating and unusual fatigue can be other side effects of this substance.