Product Details
High-Purity CaCO₃ for Industrial Applications | Low Oil Absorption, High Brightness
🔎What Is Heavy Calcium Carbonate?
Heavy calcium carbonate, also known as ground calcium carbonate (GCC), is a form of CaCO₃ with higher density, coarser particle size, and irregular shapes, produced by mechanical grinding of natural limestone or marble. It is widely used in paper, coatings, plastics, construction, and food applications due to its high whiteness, low oil absorption, and stable chemical structure.
Learn more about our Ground Calcium Carbonate (GCC) and how it compares with Precipitated Calcium Carbonate (PCC).
🔧Key Properties and Advantages
| Property | Heavy Calcium Carbonate |
|---|---|
| CAS No. | 471-34-1 (Heavy CaCO₃) |
| Formula | CaCO₃ |
| Color | White |
| Average Particle Size | 5 – 25 µm |
| Bulk Density | 0.8 – 1.3 g/cm³ |
| Melting Point | 825°C (decomposes) |
| Boiling Point | Not applicable (decomposes) |
| Heavy Metal Content | < 0.002% (customizable) |
Larger particle size offers better opacity and filling ability.
High brightness (≥95%) ideal for paper & paints.
Stable formula suitable for food-grade and pharmaceutical calcium carbonate uses.
Lower oil absorption improves flow and dispersion in plastic/rubber processing.
🏭Applications of Heavy CaCO₃
🧾 Paper Industry
Used as a cost-efficient filler to improve opacity, whiteness, and print surface.
🎨 Paints & Coatings
Improves brightness, smoothness, and pigment dispersion; ideal for emulsion paints and primers.
🏗️ Construction Materials
Filler in mortar, putty, and precast concrete; reduces costs and enhances body.
🚫🔥 Fireproof Ceilings
Used to enhance brightness and flame resistance in fire-retardant panels.
🍽️💊 Food & Pharma
Used in antacids, tablets, and nutritional supplements (upon request, custom CaCO₃ specs available with MSDS).
⚙️ Other Uses
Plastic masterbatches
Sealants & adhesives
Feed-grade fillers
✅ Why Choose Our Heavy Calcium Carbonate?
Sourced from high-purity white limestone
Customizable grades with MSDS, COA, and particle size control
Competitive export pricing from our ISO-certified Chinese plant
Technical support for application-specific requirements
Backed by Jintai’s expertise in calcium-based materials and global supply capability
📦 Customization & OEM Services
We offer tailored heavy calcium carbonate powders for clients requiring:
Specific bulk density
Surface treatment or moisture control
Food/pharma compliance
Private label or OEM packaging
📌 Visit our Custom Calcium Carbonate Solutions page for details.
❓FAQ – Heavy vs Light Calcium Carbonate
Q1: What is the difference between heavy and light calcium carbonate?
A1: Heavy CaCO₃ is mechanically ground and has a higher bulk density, irregular shape, and coarser particles. Light CaCO₃ is chemically precipitated, fine, and spherical with higher purity and surface area. See our comparison guide for more.
Q2: What is the bulk density of heavy calcium carbonate?
A2: Typically ranges between 0.8–1.3 g/cm³, depending on particle size.
Q3: Can I get a food or pharma grade of heavy CaCO₃?
A3: Yes, we provide certified food/pharma grades with low heavy metals and specified microbial limits upon request.
Q4: Does heavy calcium carbonate contain heavy metals?
A4: Our industrial-grade typically has <0.002% heavy metals. Food and pharma grades are tested to meet applicable standards.
Q5: Is this product customizable for my application?
A5: Yes. We support custom powder densities, moisture levels, and particle size distributions.
