Calcium Carbonate 400mesh Industrial Grade Powder

Fundamental Characteristics
Calcium carbonate (CaCO₃) represents one of the most versatile and economically viable inorganic mineral fillers available today. This naturally occurring compound exhibits exceptional physicochemical properties that make it indispensable across numerous industrial applications. As a non-toxic, odorless, and non-irritating white powder, it meets the strictest safety requirements for diverse applications ranging from food additives to construction materials.

Chemical Properties

• Molecular formula: CaCO₃

• Molecular weight: 100.09 g/mol

• Crystal structure: Calcite, aragonite, or vaterite forms

• Decomposition temperature: 825-900°C (yielding CaO + CO₂)

• Solubility profile:

  • Water: 0.0014 g/100 mL (25°C)

  • Alcohol: Insoluble

  • Weak acids: Soluble with effervescence

  • Organic solvents: Negligible solubility

Physical Parameters

• Appearance: Ultra-fine white powder

• Bulk density: 0.6-1.3 g/cm³ (varies by grade)

• Mohs hardness: 3.0

• Refractive index: 1.59

• pH value: 8.5-9.5 (10% aqueous suspension)

• Whiteness: 90-98% (ISO brightness)

Manufacturing Processes

• Ground Calcium Carbonate (GCC):

  • Dry processing: Crushers, classifiers, mills

  • Wet processing: Slurries with 70-78% solids

• Precipitated Calcium Carbonate (PCC):

  • Carbonation process

  • Lime-soda process

  • Controlled crystallization techniques

Grade Classification
| Grade Type | Particle Size | Surface Area | Primary Applications |
|------------|--------------|--------------|----------------------|
| Ultra-fine | 0.5-2 μm | 5-15 m²/g | High-end plastics, cosmetics |
| Fine | 2-10 μm | 2-5 m²/g | Paper coating, paints |
| Medium | 10-50 μm | 1-2 m²/g | Rubber, adhesives |
| Coarse | 50-100 μm | <1 m²/g | Construction materials |

Functional Advantages

• Cost Efficiency: 30-50% lower than alternative fillers

• Process Benefits:

  • Reduces compound viscosity

  • Improves melt flow characteristics

  • Enhances dimensional stability

• Performance Enhancements:

  • Increases impact strength in polymers

  • Improves surface finish

  • Enhances printability in paper coatings

Industry-Specific Applications

Polymer Composites

• Plastics: 10-40% loading in PVC, PP, PE

• Rubber: 20-60% filler in tires, hoses

• Sealants: Improves rheology and sag resistance

Coatings & Inks

• Paints: 15-30% extender pigment

• Inks: Enhances opacity and print quality

• Putty: Primary filler component

Paper Industry

• Filler: 5-25% in paper bulk

• Coating: 30-70% in coating formulations

Specialty Applications

• Food: Acid regulator (E170)

• Pharma: Tablet excipient

• Cosmetics: Opacifying agent

• Dentistry: Toothpaste abrasive

Surface Modification Options

• Stearic acid coating (1-3%)

• Silane coupling agents

• Titanate treatments

• Polymer grafting

Technical Comparison with Alternative Fillers
| Property | CaCO₃ | Talc | Kaolin | Silica |
|----------|-------|------|--------|-------|
| Cost Index | 1.0 | 1.8 | 1.5 | 3.0 |
| Density (g/cm³) | 2.7 | 2.8 | 2.6 | 2.2 |
| Oil Absorption | Medium | High | High | Very High |
| Reinforcement | Low | Medium | Medium | High |
| Brightness | Excellent | Good | Good | Fair |

Quality Standards

• Food grade: FCC, USP, EP compliance

• Industrial grade: ISO 3262

• Technical grade: ASTM D1199

• REACH registered

Environmental Profile

• Naturally abundant resource

• Carbon footprint: 0.1-0.3 kg CO₂/kg

• Biodegradable and non-toxic

• Recyclable in multiple applications

Packaging Options

• 25 kg multi-wall paper bags

• 1-ton bulk bags

• Silo trucks for large volumes

• Customized packaging available

Storage Considerations

• Shelf life: Unlimited in dry conditions

• Moisture sensitivity: <0.5% water absorption

• Stacking: Maximum 10 pallets high

• Handling: Standard powder equipment

Emerging Applications

• Biodegradable polymer composites

• Environmental remediation

• Advanced paper coatings

• 3D printing materials

Technical Support Services

• Material selection guidance

• Formulation optimization

• Processing parameter recommendations

• Quality troubleshooting

This comprehensive technical profile demonstrates calcium carbonate's unparalleled versatility as an industrial filler. Its unique combination of physical characteristics, chemical stability, and economic advantages continues to make it the first-choice mineral across countless applications. Ongoing technical developments are further expanding its utility in advanced material systems and sustainable technologies.

TDD-Global.com is a professional China chemical B2B marketplace operated by IBI Company, dedicated to promoting global communication, business negotiation, and market expansion in the chemical industry. With a strong network of China chemical product suppliers and international buyers, TDD-Global creates a dynamic and efficient platform for sourcing, trading, and cooperation.

Under the brand name TUDUODUO, TDD-Global has built a trusted reputation among suppliers and buyers in sectors such as fine chemicals, raw materials, industrial additives, and advanced chemical solutions. We offer a wide range of services including product listing, online promotion, supply chain solutions, and international marketing support.

Our platform connects hundreds of verified China chemical suppliers with buyers worldwide, fostering transparent transactions, better business opportunities, and high-value partnerships. Whether you are looking for bulk commodities, specialty chemicals, or customized procurement services, TDD-Global is your go-to platform.

Driven by the innovative spirit of IBI Company, we are committed to building a smarter, faster, and more reliable global chemical trade ecosystem.

If you are interested in cooperation, strategic partnerships, or customized chemical sourcing, please feel free to contact us. Let's shape the future of the chemical industry together!