For purchasing professionals and chemical formulators, a thorough understanding of product specifications is the cornerstone of successful raw material procurement. Calcium carbonate, a fundamental inorganic chemical, presents various grades and specifications that cater to a wide array of applications, from food leavening to industrial fillers. This guide aims to clarify these specifications, empowering you to make informed decisions when you buy calcium carbonate.

The foundational identifier for calcium carbonate is its CAS number: 471-34-1. This number guarantees you are sourcing the correct chemical compound. However, its true value lies in its physical and chemical properties, which are detailed in product specifications. Key parameters include purity, typically stated as CaCO3 content, which should be ≥98% for high-quality applications. For its use as a food grade leavening agent, adherence to stringent purity standards and appropriate particle size is critical.

Particle size distribution is another vital specification. Manufacturers often provide particle size data in mesh counts (e.g., 200 mesh, 400 mesh, up to 4000 mesh) or as an average particle diameter (e.g., 3.0-4.0 µm). This parameter significantly impacts rheology, surface area, and reactivity. When seeking a calcium carbonate filler for rubber or plastics, finer particles generally yield better mechanical reinforcement. For coatings, specific particle sizes can influence gloss and opacity. As a dedicated manufacturer and supplier in China, we ensure our calcium carbonate powders offer precisely controlled particle size distributions to meet these diverse needs.

Other important specifications may include moisture content (ideally ≤0.3%), oil absorption, and pH value. These parameters can affect processing and the final product's stability. When comparing a calcium carbonate supplier, always request a comprehensive Certificate of Analysis (COA) that details these specifications for each batch. Understanding the price in relation to these specifications is crucial for making a value-driven purchase decision.

For businesses looking to purchase calcium carbonate, especially in bulk, partnering with a reliable calcium carbonate powder manufacturer that provides consistent quality and clear specifications is paramount. We are committed to transparency and quality, offering calcium carbonate that serves effectively as a food additive, industrial filler, and more. Contact us to discuss your specific requirements and receive detailed specifications for our products.