Barium Sulfate (CAS 7727-43-7) Manufacturer & Wholesale Supplier | High Purity Synthetic Precipitated & Natural Grade
Name: Barium Sulfate
Cas: 7727-43-7
Purity: 99%
MOQ: 1KG
Directory Guidance on Barium Sulfate
Chemical Structure
Basic Info
Barium Sulfate (CAS 7727-43-7): Ultra-Pure Functional Filler & Extender for Advanced Industrial Applications
Barium Sulfate (BaSO4, CAS 7727-43-7) is an inorganic, chemically inert compound widely utilized as a premium functional filler across coatings, plastics, rubbers, inks, and specialty chemical formulations. Manufactured via precise chemical precipitation (synthetic precipitated barium sulfate) or high-grade natural barite processing, it exhibits high density, high whiteness, exceptional light-scattering properties, and robust resistance to acids, alkalis, and weathering.
Due to its low oil absorption, high temperature stability, and non-reactive profile, Barium Sulfate enhances mechanical strength, gloss retention, and rheological control without compromising color brilliance or resin cross-linking.
| Melting point | 1580 °C |
| Boiling point | decomposes at 1580℃ [KIR78] |
| density | 4.5 |
| bulk density | 500kg/m3 |
| storage temp. | Storage temperature: no restrictions. |
| solubility | water: insoluble |
| form | powder |
| 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) |
Our production facilities and quality management workflows strictly comply with international standards to ensure batch consistency and regulatory compliance for global distribution.
ISO 9001:2015 & ISO 14001:2015: Certified quality management and eco-conscious manufacturing processes.
REACH Registered (EU): Full registration status for bulk importing and distribution across European markets.
RoHS & Heavy Metal Compliance: Verified low trace-element profile, fully compliant with EU Directive 2011/65/EU and EN 71-3 toy safety standards.
FDA Compliance (Select Grades): Meets requirements for indirect food contact applications in packaging plastics and coatings under relevant 21 CFR sections.
Technical Documentation Package: Safety Data Sheet (SDS) following GHS standards, Certificate of Analysis (COA), Technical Data Sheet (TDS), and Heavy Metal Test Reports supplied with every shipment.
Product Packaging
To maintain consistent particle morphology, brightness, and dispersion performance, each batch undergoes a standardized multi-point quality inspection prior to release:
Particle Size Distribution (PSD) Analysis: Measured via laser diffraction particle size analyzers (Malvern) to strictly control average particle diameter (D50) and eliminate coarse agglomerates.
Whiteness & Brightness Testing: Evaluated using spectrophotometric colorimeters (L*a*b* space) to ensure high L* values and color fidelity in clear/pigmented systems.
Oil Absorption & Rheology Check: Tested according to ISO 787/5 protocols to guarantee predictable viscosity behavior during high-shear dispersion.
Chemical Purity & Heavy Metals: Assessed via Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES) to verify low content of soluble barium, iron oxides, and heavy metals.
pH & Water-Soluble Matter: Measured per ISO standards (10% aqueous slurry) to ensure complete compatibility with sensitive waterborne and solvent-borne systems.
Barium Sulfate serves as a multi-functional additive across diverse manufacturing sectors:
Paints & Powder Coatings: Acts as a spacer for titanium dioxide (TiO2), reducing agglomeration and optimizing hiding power. Improves scratch resistance, gloss stability, and film hardness in automotive primers, industrial coatings, and architectural paints.
Plastics & Polymer Composites: Used in polyolefins (PP, PE), engineering plastics (ABS, PA), and masterbatches to enhance dimensional stability, thermal conductivity, tensile strength, and processing throughput.
Printing Inks: Ensures controlled tack, low abrasiveness to printing plates, and high color transparency in offset, flexographic, and gravure inks.
Acoustic & Vibration Damping Materials: High density (4.0–4.5 g/cm3) makes it an effective sound deadener in automotive floor mats and construction insulation materials.
Medical & Radiation Shielding: Serves as a radiopaque agent in specialized polymer compounds and X-ray protective aprons or shielding walls.
Processing Notes:
Easily dispersed using high-speed dissolvers or bead mills.
In polymer compounding, surface-treated grades (silane or fatty acid coated) are recommended for improved wet-out and interfacial adhesion with non-polar matrices.
FAQ
A: Precipitated Barium Sulfate is chemically synthesized, offering ultra-high purity, narrow particle size distribution, superior whiteness, and minimal abrasive impurities. Natural barite powder is produced via mechanical milling, making it a cost-effective choice for heavy-duty industrial coatings or sound-deadening applications where extreme optical clarity or sub-micron dispersion is not critical.
A: Free soluble barium ions are toxic; however, Barium Sulfate (BaSO4) is extremely insoluble in water, organic solvents, and dilute acids (including stomach acid). As a result, non-soluble BaSO4 is non-toxic under normal handling conditions and is widely accepted for food-contact plastics and medical diagnostics under regulatory guidelines.
A: Standard packaging includes 25 kg multi-wall paper bags with PE liners or 1,000 kg moisture-proof jumbo bags. Store in a dry, covered warehouse away from direct moisture and contamination to prevent powder caking during storage.
Related References
Pubchem-Barium Sulfate
Chemicalbook-Barium Sulfateethylammonium Chloride
Manufacturer of Barium Sulfate
1. For products ≤50kg, we recommend using express delivery, which is usually called DDU service (discounted, convenient).
2. For products ≤500kg, we generally recommend air freight, which is usually called FOB, CFR or CIF service (fast and efficient).
3. For products >500kg, we generally recommend shipping by sea, which is usually called FOB, CFR or CIF service (economical, safe).
4. For high-value products, please choose air or express to ensure the safety of product transportation.
