Barium sulfate

Barium sulfate

Barium sulfate from a pharmacy
Names
IUPAC name Barium sulfate
Other names Barium sulphate
Identifiers
Jmol-3D images	Image
SMILES [Ba+2].[O-]S([O-])(=O)=O
Properties
Chemical formula	BaSO4
Molar mass	233.43 g/mol
Appearance	White solid
Odor	Odorless
Density	4.49 g/cm3
Melting point	1,580 °C (2,880 °F; 1,850 K)
Boiling point	1,600 °C (2,910 °F; 1,870 K) (decomposes)
Solubility in water	0.0002448 g/100 mL (20 °C) 0.000285 g/100 mL (30 °C)
Solubility	Soluble in concentrated sulfuric acid Insoluble in acetone, chloroform, ethanol, toluene
Thermochemistry
Std molar entropy (So298)	132 J·mol−1·K−1
Std enthalpy of formation (ΔfHo298)	−1465 kJ·mol−1
Hazards
Safety data sheet	ScienceLab
Flash point	Non-flammable
Related compounds
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Barium sulfate or barium sulphate is an insoluble salt of barium, with a variety of applications. It has the chemical formula BaSO₄.

Properties

Physical

Barium sulfate is a dense white solid, insoluble in water.

Availability

Barium sulfate can be purchased from many pharmacies.

Preparation

Delete this section if not applicable

Projects

• Make white pigment
• Green flame in some pyrotechnics
• Paper brightener

Handling

Safety

Although soluble salts of barium are toxic to humans, barium sulfate is nontoxic due to its insolubility. This allows it to be used safely in X-ray investigations.

Storage

Barium sulfate should be stored in closed bottles.

Disposal

Due to its low toxicity, barium sulfate doesn't require special disposal.

References

Relevant Sciencemadness threads

• Need help with BaSO4..