Overview
Calcium lactate is a calcium salt of lactic acid, produced through the neutralization of lactic acid with calcium carbonate or hydroxide. It is widely utilized due to its excellent solubility and bioavailability compared to other calcium salts like calcium carbonate. The compound is odorless, has a neutral taste, and is less likely to cause gastrointestinal discomfort, making it a preferred choice for dietary supplements and fortified foods. In the industrial context, calcium lactate serves multiple roles, from a nutrient supplement in animal feed to a pH regulator in food processing. Its versatility and safety profile have cemented its position in regulated industries, including pharmaceuticals, where it acts as a tablet binder or filler.
Physical and Chemical Properties
Calcium lactate typically appears as a white or off-white crystalline powder. It is highly soluble in water (approximately 3.4 g/100 mL at 20°C) but only slightly soluble in ethanol. The compound decomposes at around 120°C without melting, releasing water and forming calcium oxide. Its solubility and stability profile make it suitable for liquid formulations, unlike less soluble calcium salts. Chemically, it is stable under normal storage conditions but may absorb moisture if exposed to humid environments. Unlike calcium citrate or carbonate, it does not require acidic conditions for absorption, which enhances its utility in neutral-pH applications such as dairy products or baked goods.
Main Applications
In the food industry, calcium lactate is a multifunctional additive (E327) used for calcium fortification in beverages, cereals, and dairy alternatives. It also acts as a firming agent in fruits and vegetables during processing. Its neutral taste avoids flavor interference, a critical advantage over calcium chloride or gluconate. Pharmaceutically, it is employed in chewable tablets and lozenges due to its palatability. Nutraceutical formulations leverage its high bioavailability for bone health supplements. Additionally, it finds niche uses in biodegradable plastics and as a coagulant in tofu production, showcasing its cross-industry relevance.
Safety and Storage
Calcium lactate is classified as GRAS by the FDA and is safe for consumption within recommended doses (typically 1,000–1,300 mg/day for adults). Overconsumption may lead to hypercalcemia, manifesting as nausea or kidney stones. Industrial handlers should use standard PPE to avoid dust inhalation, though its toxicity is low. Storage requires protection from moisture to prevent caking. Ideal conditions include airtight containers in cool (below 25°C), dry environments. Bulk quantities should be stored on pallets away from walls to ensure ventilation. Shelf life typically exceeds two years if stored properly.
B2B Procurement Guide
When sourcing calcium lactate, prioritize suppliers with ISO or GMP certifications to ensure compliance with food and pharmaceutical standards. Key specifications include purity (≥98%), heavy metal limits (e.g., <10 ppm lead), and microbial counts. Request certificates of analysis (CoA) for each batch. Pricing varies by order volume and grade. Food-grade material (FCC) commands a premium over technical-grade. For large-scale procurement, negotiate contracts with clauses for consistency in particle size and solubility. Consider regional suppliers to minimize logistics costs, as the compound is widely produced in North America, Europe, and Asia.
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