Product Description of Barium sulfate CAS#7727-43-7
Barium Sulfate is a white inorganic powder. It has outstanding chemical stability, weather resistance and high opacity. It is non-soluble in water and dilute acids. This product includes precipitated and natural barite grades, with controllable particle fineness and consistent whiteness. It acts as an economical functional filler in paint, plastic, rubber and printing ink. Medical grade barium sulfate has high radiopacity for X-ray contrast examination.
It can improve the surface gloss, wear resistance and dimensional stability of finished materials without affecting the basic performance of the formula. It also meets multiple industry standards and can be supplied according to customized particle size requirements for different end-use scenarios.
Barium sulfate Chemical Properties
| Melting point | 1580 °C |
| Boiling point | decomposes at 1580℃ [KIR78] |
| density | 4.5 |
| storage temp. | Storage temperature: no restrictions. |
| solubility | water: insoluble |
| form | powder |
| color | White to yellow |
| Specific Gravity | 4.5 |
| PH Range | 7 |
| PH | 3.5-10.0 (100g/l, H2O, 20℃)suspension |
| Odor | wh. or ylsh. fine powd. free from grittiness, odorless, tasteless |
| Water Solubility | 0.0022 g/L (50 ºC) |
| Crystal Structure | Barite |
| crystal system | Nogata |
| Merck | 14994 |
| Solubility Product Constant (Ksp) | pKsp: 9.97 |
| Space group | Pnma |
| 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 |
| OSHA: TWA 15 mg/m3; TWA 5 mg/m3 | |
| NIOSH: TWA 10 mg/m3; 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 |
Product Application of Barium sulfate CAS#7727-43-7
Barium Sulfate is a versatile inorganic filler widely applied across multiple industries. In oil and gas exploration, it acts as a weighting agent for drilling mud to control downhole pressure and prevent blowouts. It serves as a functional extender filler in powder coatings, paints, printing inks and plastics, improving gloss, hiding power and weather resistance while lowering formulation costs. It is also added into rubber products, friction materials and sealants to enhance rigidity and wear resistance.
Medical-grade barium sulfate is used as a radiopaque contrast medium for X-ray diagnostic examinations. Besides, it can be used for radiation shielding, paper coating, ceramic production and raw material for manufacturing other barium salts.
