Barium Sulfate
Barite, Barium White
- CAS
- 7727-43-7
- EC
- 231-784-4
- Sectors
- Mining & Metals, Coatings, Adhesives, Sealants & Elastomers, Plastics & Polymers
Barium Sulfate (CAS 7727-43-7) is an inert white crystalline powder, a barium salt of sulfuric acid with very low solubility in water and acids, used as a filler and pigment extender in coatings, plastics and rubber and as a radiopaque agent in X-ray imaging. Its high density, opacity, and chemical inertness make it a preferred filler and pigment extender.
Typical Properties
| Molecular formula | Ba.H2O4S |
|---|---|
| Molecular weight | 233.39 g/mol |
| Appearance | Barium sulfate is a white crystalline solid. |
| Form | powder |
| Color | White to yellow |
| Odor | wh. or ylsh. fine powd. free from grittiness, odorless, tasteless |
| Melting point | 1580 °C |
| Boiling point | 1600 °C |
| Density | 4.49 g/cm³ |
| Water solubility | 0.0022 g/L (50 °C) |
| pH | 3.5-10.0 (100g/l, H2O, 20°C)suspension |
| GHS signal word | Danger · Irritant / harmful, Health hazard |
| HS code | 28332700 |
Typical literature values for identification; lot-specific results are stated on the certificate of analysis (COA) and the safety data sheet (SDS) that accompany every delivery.
Barium Sulfate
Applications
Used in coatings, plastics, and rubber to improve gloss, mechanical strength, and weather resistance. In the medical field, it serves as a radiopaque agent for X-ray imaging. It is also applied in paper coatings, catalysts, and ceramics.
Safety & Risks
Non-toxic and chemically stable; however, fine dust may cause mechanical irritation. Avoid inhalation and excessive dust generation.
Packaging
Supplied in 25–50 kg paper bags with PE liners or big bags. Store sealed, dry, and free from contamination to maintain whiteness and flowability.