Ultra-White Ultra-Fine Heavy Calcium Carbonate 1250 Mesh Whiteness 97% Heavy Calcium

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Product Description

Calcium carbonate powder is a highly versatile inorganic material with the chemical formula CaCO3, renowned for its wide natural distribution and extensive industrial applications. It presents as a white, odorless, and tasteless crystalline powder, making it a preferred raw material across numerous sectors.Physical Characteristics: It has a molecular weight of 100.09 and a density ranging from 2.70 to 2.95 g/cm³. The powder is practically insoluble in water and organic solvents like ethanol, but readily dissolves in acids, releasing carbon dioxide gas. It decomposes at approximately 825°C, producing calcium oxide and carbon dioxide. Key quality indicators include high whiteness (typically 85%-96%), fine particle size, and low moisture content.
Chemical Stability: It is chemically stable under normal conditions, non-toxic, non-irritating, and exhibits a slightly alkaline nature. These properties underpin its safety and compatibility in food, pharmaceutical, and various industrial formulations.
Crystal Structures: It exists in three primary crystal forms: calcite (the most stable and common), aragonite, and vaterite. Calcite, the main component of limestone and marble, is the most industrially significant due to its stability and abundance.

Calcium carbonate powder is categorized mainly by its production method, which dictates its particle size, purity, and performance:

Ground Calcium Carbonate (GCC): Produced by physically crushing and grinding natural minerals like high-purity calcite and marble. It features irregularly shaped particles, relatively larger sizes (5-50μm), high purity (up to 98%+), and low production costs. It is widely used for general filling purposes.
Precipitated Calcium Carbonate (PCC): Manufactured through a chemical process involving limestone calcination, digestion, carbonation, dehydration, and drying. This yields finer, more uniformly sized particles (0.5-5μm), higher whiteness, and superior dispersibility, making it ideal for high-end applications.
Activated Calcium Carbonate: A modified form produced by surface-treating GCC or PCC with coupling agents. This enhances its compatibility with organic polymers (like plastics and rubber), improving reinforcement and processing properties.

Specification

Item	Value
CAS No.	471-34-1
MF	CaO3
EINECS No.	207-439-9
Purity	99.2%
Appearance	Fine grained powder
Product name	Clacium Carbonate Powder
Color	White
Particle size	2-75 microns
Whiteness	70-95
PH value	7-8, 9-11
Usage	Paint Plastic Paper Industry Additives
MOQ	1 kg
Packing	25kg/50kg/1000kg/bag;Customized packaging
CAS	471-34-1

Application

Plastics & Rubber: As the most consumed inorganic filler, it reduces material costs while improving dimensional stability, rigidity, heat resistance, and surface finish of products. In rubber, it acts as a reinforcing agent, partially replacing more expensive carbon black.
Paper Industry: Used extensively as a filler and coating pigment, it significantly boosts paper whiteness, opacity, smoothness, and printability. Its low abrasiveness also helps protect paper-making equipment.
Paints & Coatings: Serves as a key extender pigment, providing excellent hiding power, enhancing film durability, and improving flow and leveling characteristics.
Other Uses: Applied in construction materials, adhesives, sealants, cosmetics, and as a soil conditioner in agriculture to neutralize acidity and provide calcium nutrients.

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