1. Basic Product Information
Product Name: Ground Calcium Carbonate (GCC), Heavy Calcium Carbonate
Chemical Name: Calcium Carbonate
Molecular Formula: CaCO₃
Molecular Weight: 100.09
CAS No.: 471-34-1
HS Code: 2836.50
Payment Terms: T/T, L/C
Trade Terms: FOB, CFR, CIF
MOQ: 20GP ≈ 20-25MT
Appearance: Pure white ultra-fine powder with uniform and transparent color, no variegation, no black spots and no coarse particles. The powder is dry, fluffy, free-flowing, caking-free and odorless. It features high purity and stable whiteness, hardly absorbing moisture or discoloring during long-term storage with uniform fineness.
Product Introduction: Ground Calcium Carbonate (GCC) is a functional inorganic mineral powder processed from high-purity natural calcite, marble and limestone through precise sorting, purification, ultra-fine grinding, graded screening, impurity removal and drying. The products are divided into Industrial Grade Ground Calcium CarbonateandFood Grade Ground Calcium Carbonate, strictly complying with GB/T 19281-2022 industrial standard and GB 1886.214-2016 national food safety standard. Featuring high purity, extremely low impurities and stable chemical properties, the product has multiple advantages including filling reinforcement, whitening and toughening, wear resistance and weather resistance, as well as cost reduction. It is the most widely used and cost-effective environmentally friendly universal filler for coatings, rubber and plastics, building materials, papermaking, daily chemicals, food, pharmaceutical and other industries.
2. Physical and Chemical Properties
This product is a white inorganic mineral powder, non-toxic, odorless, environmentally friendly and non-radioactive. It has a density of 2.7g/cm³ and a Mohs hardness of 3.0, with uniform texture and stable structure. It features strong chemical inertness at room temperature, excellent resistance to acid, alkali, corrosion, aging and high temperature, and is not easy to oxidize and deteriorate. Insoluble in water and ethanol, it is slightly soluble in acidic media and has a good pH buffering capacity. The powder has uniform particle size distribution, moderate specific surface area and low oil absorption value, with excellent dispersibility and fluidity. It is highly compatible with resins, emulsions, rubber, plastics, mortar, coatings and other substrates without agglomeration, sedimentation or delamination. It can significantly improve the hardness, rigidity, wear resistance, flatness, weather resistance and dimensional stability of finished products, effectively reduce formula costs, and adapt to automated mass production processes.
3. Executive Standards & Technical Specifications
Executive Standards: GB/T 19281-2022 Calcium Carbonate, GB 1886.214-2016 National Food Safety Standard - Food Additive Calcium Carbonate, GB 6566 Limits of Radionuclides in Building Materials
Product Grades: Industrial Grade Ground Calcium Carbonate, Food Grade Ground Calcium Carbonate
4. Core Product Characteristics
1. High Purity & Low Impurities with Superior Batch Stability
Selected high-purity calcite raw ore undergoes multiple water washing, impurity removal and fine screening processes to strictly control heavy metals, arsenic and soluble impurities. The powder is pure white without variegation or black spots. All batches feature highly unified whiteness, purity and fineness with stable performance, completely avoiding mixed materials and inferior quality problems.
2. Low Oil Absorption & High Filling Capacity for Significant Cost Reduction
Featuring dense powder structure and moderate specific surface area, its oil absorption value is much lower than similar fillers. It can replace high-priced raw materials such as resin and titanium dioxide in a large proportion, greatly reducing formula production costs without affecting product performance, perfectly adapting to cost reduction demands for large-scale mass production.
3. Excellent Dispersibility Suitable for Automated Mass Production
The powder is dry, non-agglomerated and free-flowing with fast wetting speed. It has excellent compatibility with water-based, oil-based and cementitious systems, easy to stir and disperse without sedimentation or skinning. It supports continuous assembly line feeding and precise proportioning production without material blockage or efficiency loss.
4. Reinforcement & Toughening to Improve Comprehensive Product Performance
It effectively enhances the hardness, rigidity, wear resistance, impact resistance and dimensional stability of rubber, plastic, coating and building material products, reduces shrinkage, deformation and cracking problems, optimizes surface flatness and glossiness, and prolongs product service life.
5. Excellent Weather & Corrosion Resistance for Complex Working Conditions
With stable chemical properties, it resists acid and alkali corrosion, dry-wet cycles, aging and ultraviolet radiation. It hardly pulverizes, fades or peels during long-term outdoor use, significantly improving the weather resistance and anti-corrosion performance of end products.
6. Food Grade Safety & Compliance for Diverse Application Scenarios
Food grade calcium carbonate fully complies with national food additive standards, featuring low heavy metal content, no harmful residues and non-toxicity. It can be safely used in strict scenarios such as food leavening, nutrition fortification, feed addition and pharmaceutical excipients.
7. Eco-friendly & Non-radioactive with Green Performance
Made of natural mineral raw materials without radioactivity or harmful substance precipitation. It meets domestic and international environmental protection standards, suitable for high-end scenarios such as high-grade home decoration, food contact products, children’s supplies and export commodities.
5. Main Application Fields
Coating & Ink Industry (Core Application)
Widely applied in interior and exterior wall latex paint, industrial anti-corrosion paint, powder coating, water-based industrial paint, wood paint and printing ink. Serving as a body filler, whitening filler and weather-resistant filler, it improves film hardness, flatness, covering power, wear resistance and aging resistance, reduces coating oil absorption, prevents film cracking and powder falling, and greatly cuts down coating production costs.
Plastic & Rubber Industry
Suitable for filling and modification of PVC, PP, PE, ABS, pipes, plates, profiles, wires and cables, rubber sealing rings and silicone products. It enhances product rigidity, hardness, heat resistance, flame retardancy and dimensional stability, reduces shrinkage deformation and warping cracking, and improves surface finish and insulation performance, serving as the most universal reinforcing filler in the rubber and plastic industry.
Construction & Building Material Industry
Used for dry-mixed mortar, putty powder, gypsum products, waterproof building materials, tile adhesive, caulking agent and thermal insulation materials. It improves mortar compactness, strength, wear resistance and crack resistance, optimizes construction feel, and prevents wall sanding, hollowing and cracking, adapting to the production of prefabricated buildings and engineering & home decoration building materials.
Papermaking Industry
Applied as paper filler and coating pigment for cultural paper, coated paper, special paper and packaging paper. It effectively improves paper whiteness, flatness, bulkiness, ink absorption and printing clarity, optimizes paper surface fineness, and reduces papermaking raw material consumption and production costs.
Daily Chemical & Fine Chemical Industry
Used in the production of toothpaste, skin care products, detergents and powder daily chemical products. As a mild friction agent, filler and whitening additive, it improves the use feel and texture of daily chemical products with safety and no irritation.
Food & Feed Industry (Special for Food Grade)
Compliant food grade calcium carbonate acts as a calcium nutrition fortifier, leavening agent and acidity regulator, widely used in pastries, dairy products, beverages and health products. It also serves as a feed additive to supplement calcium for livestock and poultry and promote growth with no harmful residues.
Pharmaceutical Industry
High-purity food grade calcium carbonate can be used as pharmaceutical excipients, tablet fillers and calcium supplement raw materials, featuring high purity, few impurities and stable performance, which meets pharmaceutical production safety standards.
Environmental Water Treatment Industry
It can be used as an acid-base neutralizer and water quality conditioning filler for industrial wastewater treatment, desulfurization and denitrification, and water pH adjustment. It adsorbs impurities and purifies water quality, serving as a low-cost and commonly used raw material for environmental water treatment.