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Calcium Ascorbate
Calcium Ascorbate is a white to off-white crystalline powder, the calcium salt of ascorbic acid, formed by neutralizing ascorbic acid with calcium carbonate or hydroxide. It has a molecular formula of (C₆H₇O₆)₂Ca and a molecular weight of 426.35 g/mol, offering the same biological activity as ascorbic acid but with reduced acidity (pH 7.0-8.0 in solution), making it gentler on the gastrointestinal tract. Highly water-soluble (16 g/100 mL at 25°C), it dissociates into ascorbate ions and calcium cations, providing a bioavailable source of both nutrients. More stable than ascorbic acid in storage, it resists oxidation in neutral to alkaline environments, making it ideal for formulations sensitive to acidity.
| Product Name | Calcium Ascorbate |
| Appearance | White Powder |
| Specification | 98% |
| Test Method | HPLC |
| CAS No | 50-81-7 |
| MF | C6H8O6 |
| Certificate | ISO/cGMP/KOSHER/HALAL/USDA ORGANIC |
Description
Functions
Dual-Action Nutrient Delivery:
Ascorbate Activity: Identical to ascorbic acid, providing antioxidant protection, collagen support, immune enhancement, and iron absorption facilitation, without the gastric irritation associated with acidic forms.
Calcium Supplementation: Each gram of calcium ascorbate provides approximately 10% of the RDI for calcium (40 mg elemental calcium), contributing to bone mineral density, muscle contraction, and nerve impulse transmission. The chelated form may offer better calcium absorption compared to calcium carbonate, especially in individuals with low stomach acid.
Buffering and Stability:In formulations, the calcium salt acts as a pH buffer, maintaining stability in multivitamin tablets or liquid supplements where ascorbic acid alone might degrade other heat-sensitive vitamins (e.g., thiamine, folic acid).
Applications
Dietary Supplements:
Non-Gastric Irritant Vitamin C: Preferred by individuals with acid reflux or ulcers, available in chewable tablets (250-500 mg), effervescent powders, and pediatric formulations (e.g., flavored syrups for children).
Calcium-Fortified Products: Combined with other minerals (magnesium, zinc) in bone health supplements, providing dual benefits of vitamin C and calcium in a single ingredient.
Food and Beverage Industry:
Fortifier for Sensitive Formulations: Used in alkaline drinks (e.g., plant-based milks, sports recovery drinks) and infant formulas, where its neutral pH prevents curdling or nutrient degradation.
Antioxidant in Low-Acid Foods: Stabilizes flavors and colors in meat products, baked goods, and dairy without altering taste, unlike acidic ascorbic acid.
Pharmaceutical and Clinical Settings:
Pediatric and Geriatric Care: Gentle on the stomach for elderly patients or children, often prescribed in divided doses to treat vitamin C deficiency or support immune health during infections.
Parenteral Nutrition:Used in intravenous solutions where a non-acidic vitamin C source is required, though less common than sodium ascorbate due to calcium’s solubility limits.
