Calcium carbonate – An inorganic salt that supports bone strength and digestive balance, and serves as a diluent for solid dosage forms.
1. General introduction to Calcium Carbonate
Calcium Carbonate (CaCO₃) is an inorganic calcium salt composed of calcium ions (Ca²⁺) and carbonate ions (CO₃²⁻), commonly found in nature as limestone, marble, and chalk. It is one of the highest natural sources of calcium and is widely used across industries today.
Calcium Carbonate is widely used in pharmaceuticals and dietary supplements due to its high calcium content and natural alkalinity, helping support bone mineralization and neutralize excess gastric acid. These dual mechanisms make it a strategic ingredient in products targeting bone health and digestive wellness.
In pharmaceutical formulations, Calcium Carbonate is also commonly used as a diluent in solid dosage forms, a buffering agent, and an opacifying agent in film-coating systems.
2. Composition of Calcium Carbonate
Main component: Calcium Carbonate (CaCO₃)
Functional roles:
Provides a high elemental calcium content (~40%)
Neutralizes stomach acid (antacid effect)
Supports mineral balance in the body
Diluent in solid dosage form
Buffering agent
Opacifier for film coated
3. Key Advantages of Calcium Carbonate
Meets pharmaceutical and dietary supplement grade standards for API.
High elemental calcium content(~40%) enables efficient calcium supplementation with lower doses, optimizing cost and formulation space
pH buffering capacityallows rapid neutralization of stomach acid, ideal for digestive support products
Controlled particle sizeand surface area improve dissolution rate and bioavailability
High chemical stability extends shelf life and minimizes interactions with other ingredients
Good compressibility and flowabilitycompatible with various formulation processes.
Dual functionality (calcium supplementation + antacid)reduces the number of raw materials in formulations
4. Applications of Calcium Carbonate
API in Pharmaceuticals and Nutraceuticals:
Bone health products: Widely used as the primary calcium source to maintain bone density and structural strength. Its high elemental calcium content makes it suitable for long-term supplementation.
Digestive and antacid products: Acts as a key ingredient in digestive aids and antacid formulations. It reacts with stomach HCl to reduce acidity, alleviating symptoms such as heartburn, acid reflux, and stomach discomfort.
Multi-functional products:Often used as a dual-purpose ingredient to provide calcium supplementation and acid neutralization, optimizing formulation efficiency and market value.
Excipient:
Diluent in solid dosage form such as tablet, hard capsule, sachet and granule
Supports binder excipient functionality
Buffering agent, dissolution aid in dispersible tablets
Opacifier in tablet film-coating
Bulking agent in tablet sugar-coating process
5. Commercial products using Calcium Carbonate
6. Product contact information
For more information on sourcing Calcium Carbonate, please contact us:
Edetate Sodium is a chelating agent used in pharmaceutical, cosmetic, and food formulations to support pH stability, control metal ions, and enhance preservative system performance. Suitable for serums, solutions, gels, and oxidation-sensitive formulations.
Dried Ferrous Sulphate is an iron compound widely used in pharmaceutical, nutraceutical, and micronutrient formulations. Suitable for hematinic, iron support, tablet, capsule, and oral powder applications.
Hydrogenated soybean oil from Jiangxi Alpha Hi-Tech Pharmaceutical Co., Ltd. is a highly stable lipid ingredient widely used in pharmaceutical, cosmetic and food formulations to enhance oxidative stability and product quality.
(2).png)
(1).png)
.png)
.png)
.png)
.png)
.png)
