Dibasic calcium phosphate dihydrate – Functional calcium excipient for bone support formulations
1. General introduction to Dibasic Calcium Phosphate Dihydrate
Dibasic calcium phosphate dihydrate (CaHPO₄·2H₂O) is an inorganic excipient belonging to the calcium phosphate group, widely used in pharmaceutical, nutraceutical, and food industries. In modern formulation science, it is no longer considered a conventional filler but a functional ingredient capable of optimizing manufacturing performance while enhancing the biological value of finished products.
In practical applications, Dibasic calcium phosphate dihydrate is commonly found in vitamin and mineral tablets, calcium supplements for bone health, oral care products, as well as fortified foods such as biscuits and breakfast cereals. Its broad presence across multiple product categories reflects its inherent stability, high compatibility, and multifunctional role in diverse formulation systems.
2. Chemical composition of Dibasic Calcium Phosphate Dihydrate
Chemical formula: CaHPO₄·2H₂O
Appearance: White crystalline powder, odorless
Molecular weight: ~172 g/mol
Density: ~2.31 g/cm³
Solubility: Slightly soluble in water, soluble in acidic environments
Key characteristics:
Non-hygroscopic, making it suitable for moisture-sensitive APIs
Chemically inert, minimizing interaction with active ingredients
Mild emulsifying and stabilizing properties in formulation systems
3. Advantages of Dibasic Calcium Phosphate Dihydrate
Superior direct compressibility enables efficient manufacturing: Dibasic calcium phosphate dihydrate possesses a unique crystalline structure that allows the formation of tablets with high mechanical strength and uniformity without requiring granulation steps.
High stability ensures formulation integrity: Its non-hygroscopic and chemically inert nature helps minimize interactions with active ingredients, particularly moisture-sensitive APIs.
Good flowability supports large-scale production: Stable flow properties ensure uniform powder distribution during tableting, reducing weight variation and improving batch-to-batch consistency.
Functional value through calcium and phosphorus supplementation: It serves as a bioavailable mineral source, enhancing the nutritional value of formulations.
High biocompatibility for premium applications: With a structure similar to natural bone, it offers excellent safety and compatibility, making it ideal for high-quality pharmaceutical and nutraceutical products.
4. Applications of Dibasic Calcium Phosphate Dihydrate
In pharmaceuticals
Tablets: Functions as a filler to provide structure, improve mechanical strength, and ensure weight uniformity
Direct compression tablets: Supports direct compression processes, eliminating granulation steps and reducing production costs
Capsules: Enhances powder flow and improves formulation stability during encapsulation
Calcium supplements: Provides a stable and bioavailable source of calcium and phosphorus for bone health formulations
Vitamins and minerals: Stabilizes multi-component systems and reduces interactions between micronutrients
In food
Dietary supplements: Supplies bioavailable calcium and phosphorus, enhancing nutritional value
Fortified milk: Stabilizes mineral systems and improves nutritional content in fortified formulations
Cereals: Increases mineral content and helps maintain product structure
Baked goods and baking mixes: Contributes to structural stability and participates in leavening systems in certain formulations
Premium nutrition products: Enhances product positioning through essential mineral fortification
In cosmetics and oral care
Toothpaste: Acts as a mild abrasive to remove plaque and polish tooth surfaces
Tooth powder: Improves cleaning performance and provides a smooth sensory experience
Oral care products: Supports whitening effects and protects enamel due to its stability and safety
Powder cosmetics: Enhances smoothness, dispersion, and formulation stability
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