Heavy Calcium Carbonate — Pharma Grade Supplier, Hyderabad
Product Overview
Heavy Calcium Carbonate is a pharmaceutical-grade calcium carbonate with high bulk density, used as an antacid active ingredient, calcium supplement, tablet diluent, and food additive. The heavy grade has greater bulk density than light grade, making it more suitable for direct compression tablet formulations requiring a dense, free-flowing calcium source.
Specifications
| CAS Number | 471-34-1 |
| Molecular Formula | CaCO₃ |
| Appearance | White heavy powder |
| Assay | 98.0–100.5% |
| Loss on Drying | NMT 2.0% |
| Bulk Density | >0.5 g/mL |
| Grades | IP / BP / EP / USP |
| Packaging | 25 kg HDPE bags |
Applications
- Antacid active ingredient in pharmaceutical tablets
- Calcium mineral supplement tablets
- Tablet diluent in direct compression
- Calcium + Vitamin D3 combination products
- Food calcium fortification agent
- Calcium source in nutraceutical formulations
Why Source from Surravi Phharma?
- Ready stock maintained in our centralised AC warehouse, Hyderabad
- IP / BP / EP / USP grades available
- Complete documentation: COA, MSDS, Regulatory certifications
- Flexible quantities — lab scale to bulk commercial
- Prompt delivery with pan India logistics support
Frequently Asked Questions
Where can I buy Heavy Calcium Carbonate IP/USP grade in Hyderabad?
Surravi Phharma supplies Heavy Calcium Carbonate (CaCO₃) in IP, BP, EP, and USP grades in Hyderabad. Ready stock. Used as antacid API, calcium supplement, and tablet diluent. Call +91 8008002576.
What is the difference between Heavy and Light Calcium Carbonate?
Both are CaCO₃ with identical chemical composition and assay (NLT 98.5%), but differ in bulk density and particle characteristics. Heavy Calcium Carbonate has a higher bulk density (>0.5 g/mL) and is preferred for direct compression tablet manufacturing due to better flow. Light Calcium Carbonate has lower bulk density (<0.5 g/mL) and larger surface area, preferred for suspensions and toothpaste.
How much elemental calcium does Heavy Calcium Carbonate provide?
Calcium Carbonate (CaCO₃) contains 40% elemental calcium by molecular weight — the highest of any calcium supplement form. A 1250 mg tablet of CaCO₃ provides 500 mg elemental calcium. This high elemental calcium content makes it the most cost-effective calcium supplement source per dose.
Can Heavy Calcium Carbonate be used as an antacid API?
Yes. Calcium Carbonate is an approved antacid active pharmaceutical ingredient listed in the IP, BP, and USP. It neutralises gastric acid by reacting with HCl: CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂. It provides rapid acid neutralisation and is the active ingredient in antacid tablets and chewable antacid formulations.
Is Calcium Carbonate bioavailability affected by stomach acid?
Yes. Calcium Carbonate requires adequate stomach acid for dissolution and absorption — it is best taken with meals when acid secretion is highest. In patients on acid-suppressing medications (PPIs, H2 blockers), Calcium Carbonate absorption may be reduced. In such cases, Calcium Citrate (which dissolves without acid) is the recommended alternative.