Barium sulfate
Odorless and tasteless: The material exhibits complete organoleptic neutrality, demonstrating no detectable odor or taste, a critical characteristic for pharmaceutical formulations, food-contact materials, and premium consumer products where sensory integrity is paramount.
Stable chemical nature: Maintains inherent chemical stability, ensuring consistent performance and formulation integrity over extended periods.
Insoluble in water: Demonstrates water insolubility, particularly suited to hydrophobic applications where moisture resistance is critical.
Available in various forms: Provided in multiple physical forms including white or yellowish powders and polymorphic crystalline structures to adapt to specific processing requirements.
Barium sulfate typically occurs as white to faintly yellowish crystalline solids, powders, or polymorphic crystalline forms, all characterized by being odorless and tasteless. It demonstrates high chemical stability under standard conditions and is essentially insoluble in aqueous media. When subjected to high-temperature decomposition, the compound releases sulfur oxide fumes, requiring appropriate ventilation and safety measures during high-temperature processing.
Parameters
Melting point | 1580 °C |
Boiling point | decomposes at 1580℃ [KIR78] |
bulk density | 500kg/m3 |
density | 4.5 |
storage temp | Storage temperature: no restrictions. |
solubility | water: insoluble |
form | |
color | White to yellow |
Specific Gravity | 4.5 |
Odor | wh. or ylsh. fine powd. free from grittiness, odorless, tasteless |
PH | 3.5-10.0 (100g/l, H2O, 20℃)suspension |
PH Range | 7 |
Water Solubility | 0.0022 g/L (50 ºC) |
Crystal Structure | Barite |
crystal system | Nogata |
Merck | 14,994 |
Space group | Pnma |
Solubility Product Constant (Ksp) | pKsp: 9.97 |
Lattice constant | a/nmb/nmc/nmα/oβ/oγ/oV/nm30.89090.54670.7188909090 |
Dielectric constant | 11.4（16.0℃） |
Exposure limits | ACGIH: TWA 5 mg/m3 |
Stability | Stable. |
LogP | -1.031 (est) |
CAS DataBase Reference | 7727-43-7(CAS DataBase Reference) |
EPA Substance Registry System | Barium sulfate (7727-43-7) |
Safety Information
Hazard Codes | Xn |
Risk Statements | 20/21/22-36/37/38 |
Safety Statements | 22-24/25-36-26 |
OEB | B |
OEL | TWA: 10 mg/m3 (total) |
WGK Germany | - |
RTECS | CR0600000 |
TSCA | Yes |
HS Code | 28332700 |
Hazardous Substances Data | 7727-43-7(Hazardous Substances Data) |
Toxicity | LD50 orally in Rabbit: > 20000 mg/kg |
Barium sulfate (BaSO₄) is employed in medical diagnostics as a radiocontrast agent. When administered orally, its radiopaque properties enable clear visualization of the gastrointestinal tract by blocking X-ray transmission, assisting in the detection of ulcers and other intestinal abnormalities. Beyond medical applications, it serves as a functional additive in the manufacturing of paints, rubber products, and plastics where it acts as an inert filler and pigment.
