Heavy Calcium Carbonate (GCC, ground calcium carbonate) is a food-grade coarse-grade food mineral with higher bulk density, used in calcium supplements, antacids and food fortification.We supply bulk Heavy Calcium Carbonate sourced from leading China manufacturers, available in powder form for food and beverage manufacturers worldwide. Our Heavy Calcium Carbonate is widely used in direct-compression calcium tablets, gI-relief products, food-grade calcium fortification, pharmaceutical excipient and chewable supplement tablets.
Heavy Calcium Carbonate is produced by mechanical grinding and classifying of natural limestone or marble to a controlled particle size. This yields a higher-density product than precipitated (light) calcium carbonate.
The 'heavy' designation refers to its higher bulk density and larger particle size. Used in direct-compression tablets, antacids and food fortification.
Grades / Types Available: food grade
| Item | Specification |
|---|---|
| Appearance | White powder |
| Assay (CaCO₃) | ≥ 98.0% |
| Loss on Drying | ≤ 1.0% |
| Acid-Insoluble Substances | ≤ 0.2% |
| Bulk Density | ≥ 0.8 g/mL |
| Heavy Metals (as Pb) | ≤ 3 mg/kg |
| Purity | 98.6% (Food Grade) |
| Insoluble Matter in Hydrochloric Acid | 0.04% (Food Grade) |
| Free Alkali | qualified (Food Grade) |
| Alkali Metal and Magnesium | 0.4% (Food Grade) |
| Barium | <0.030% (Food Grade) |
| Arsenic | 0.00002% (Food Grade) |
| Fluorine | 0.0002% (Food Grade) |
| Lead | 0.00001% (Food Grade) |
| Mercury | <0.00001% (Food Grade) |
| Cadmium | <0.00001% (Food Grade) |
Our MOQ for bulk food/feed ingredient is generally 500 kg. We also support mixed containers — combine Heavy Calcium Carbonate with other food ingredients in one shipment to save on freight.
We provide free samples (100–500g) for quality testing before you place a bulk order. The buyer covers shipping costs only. Samples are typically dispatched within 2–3 business days.
Standard lead time is 7–15 days after order confirmation and payment. For stock items, delivery can be faster. We will confirm the exact timeline before you place the order.
You will receive the original COA (Certificate of Analysis), COO (Certificate of Origin), MSDS, TDS, and relevant certifications directly from the manufacturer. We guarantee full document authenticity and traceability.
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Whether you're sourcing bulk ingredients or mix container, contact our team for pricing, free samples, and technical support.