Precipitated Barium Sulphate
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Index | National Standard GB/T2899-2008 | TLZ Standard |
BaSO₄ Content | 98.0% min | 98% min |
Moisture | 0.3 max | 0.15 |
Water Soluble % | 0.3 max | 0.15 |
lron % | 0.004 max | 5 ppm |
Whiteness % | - | 97 min |
Brightness (L Value) | 10-30 g/cm³ | 98-99% |
Oil Absorption | 6.5-9.0 | 14-18 g/cm³ |
PH | - | 7.0±1 |
Particle Size D50 | - | 0.8±0.2 μm |
Particle Size D97 | - | 2-3 μm |
Particle Size D100 | - | 10 um max |
Residue (45 μm) | 0.2% max | 0.05 max |
Conductivity | - | 150 μs/cm |
Precipitated Barium Sulphate is a high-purity, chemically synthesized white powder known for its exceptional brightness, inertness, and uniform particle size. Used extensively across the coatings, plastics, rubber, and pharmaceutical industries, Precipitated Barium Sulphate offers outstanding properties that enhance product quality, appearance, and durability.
In this guide, we’ll explore the definition, characteristics, industrial applications, and sourcing tips for Precipitated Barium Sulphate, making it easier for buyers and engineers to choose the right grade for their needs.
🔍 What Is Precipitated Barium Sulphate?
Precipitated Barium Sulphate (chemical formula: BaSO₄) is synthetically produced by reacting barium salts (such as barium chloride) with sulfate salts (like sodium sulfate) under controlled conditions. This process ensures uniform particle distribution, high whiteness, and low solubility—unlike natural barite.
Because of its excellent chemical stability, low oil absorption, and high specific gravity, Precipitated Barium Sulphate is a widely preferred white filler and pigment extender in high-value applications.
⚗️ Key Properties of Precipitated Barium Sulphate
| Property | Specification |
|---|---|
| Chemical Formula | BaSO₄ |
| Purity | ≥98% (depending on grade) |
| Appearance | White, odorless fine powder |
| Oil Absorption | Low (10–15 g/100g) |
| Particle Size (D50) | 0.3–1.5 μm (customizable) |
| Specific Gravity | 4.3–4.5 g/cm³ |
| Refractive Index | ~1.64 |
| Solubility in Water | Insoluble |
| CAS Number | 7727-43-7 |
Thanks to its high density and chemical inertness, Precipitated Barium Sulphate performs well under extreme environmental or chemical conditions.
🏭 Industrial Applications of Precipitated Barium Sulphate
🎨 1. Paints and Coatings
In automotive, industrial, and architectural coatings, Precipitated Barium Sulphate acts as a functional filler and pigment extender, offering:
High brightness and smooth finish
Enhanced UV and chemical resistance
Improved opacity without affecting color tone
🧴 2. Plastics and Masterbatches
Used in PVC, PP, PE, and ABS formulations, Precipitated Barium Sulphate enhances dimensional stability, increases stiffness, and reduces shrinkage. It also improves light diffusion in translucent products.
🛞 3. Rubber and Elastomers
In rubber applications, Precipitated Barium Sulphate boosts tensile strength and wear resistance. It ensures excellent dispersion, crucial for tire, hose, and gasket production.
💊 4. Pharmaceuticals and Radiology
Medical-grade Precipitated Barium Sulphate is used as a contrast agent in X-ray imaging of the gastrointestinal tract due to its opacity to X-rays and biological inertness.
🧪 5. Chemical and Lab Use
It’s widely used in analytical chemistry for sulfate testing and as a high-purity standard for calibration.
✅ Advantages of Using Precipitated Barium Sulphate
High Purity and Brightness: Ensures a consistent, glossy finish in coatings and plastics
Low Solubility: Chemically inert in harsh environments
Excellent Dispersion: Uniform particle distribution for smooth processing
High Specific Gravity: Adds weight without altering color or stability
Cost-Effective: Replaces part of expensive pigments like titanium dioxide (TiO₂)
📦 Packaging and Storage
Standard Packaging: 25kg paper bags, 500kg or 1000kg jumbo bags
Custom Packing: Available for special specifications
Storage: Keep in a dry, cool, and ventilated environment. Avoid contact with moisture.
Proper packaging protects the flowability and performance of Precipitated Barium Sulphate over long-term storage.
🧯 Safety and Handling Guidelines
While Precipitated Barium Sulphate is non-toxic and chemically stable, it’s important to:
Avoid inhaling dust—use appropriate dust masks and ventilation
Prevent skin and eye contact—wear gloves and goggles
Follow local disposal regulations for dust or residue
Refer to the product's MSDS for complete safety protocols
🌍 How to Choose a Reliable Precipitated Barium Sulphate Supplier
Selecting a high-quality supplier is key to achieving consistent product performance. Look for:
ISO-certified manufacturing facilities
Batch-specific COA (Certificate of Analysis) and SDS
Customizable particle size and oil absorption
Stable global supply chains and flexible logistics
Technical support and after-sales assistance
Working with a dependable supplier ensures that your Precipitated Barium Sulphate meets both quality standards and industrial compliance.
📈 Why Precipitated Barium Sulphate Remains in Demand
From high-gloss automotive finishes to pharmaceutical imaging, the demand for Precipitated Barium Sulphate continues to grow due to its versatility, cost-efficiency, and performance-enhancing properties.
As industries shift toward environmentally friendly and efficient materials, Precipitated Barium Sulphate offers a non-toxic, high-performance solution that meets modern manufacturing needs.
