Premium Industrial Mineral

Calcium Carbonate

CaCO3

The world's most prevalent mineral — engineered for excellence across global industries with high whiteness, chemical inertness, and ease of dispersion.

97%+ Whiteness
Mohs ~3
Eco Safe
ISO Certified
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25+Grades
10+Industries
50+Countries
35+Years
Calcium Carbonate - 20 Microns
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Product Overview

About Calcium Carbonate

Understanding the fundamentals of calcium carbonate

Product Overview

The World's Most Prevalent Mineral

Calcium carbonate (CaCO₃) is the first and most prevalent mineral in the world and can be found in relatively large quantities as limestone, marble, and chalk.

With a Mohs hardness of approximately 3, it is the softest and most easily processed of fillers. Because of its high whiteness, chemical inertness, ease of dispersion, and low cost, calcium carbonate is essential for the integrity of paint formulations and production economics.

Limestone Marble Chalk
CaCO3

Chemical Formula

Calcium Carbonate

Chemical Properties
  • Molecular Weight100.09 g/mol
  • Melting Point825 °C
  • Density2.71 g/cm³
  • pH Value9.0 – 9.5
Physical Properties
  • Mohs Hardness~3
  • Whiteness95 – 98 %
  • Oil Absorption14 – 20
  • Moisture< 0.3 %
97%+
Whiteness
0.7–44μm
Particle Size
98%+
CaCO₃
ISO
Certified

Environmentally Benign

Non-hazardous and compatible with regulated uses.

Non-ToxicSustainableREACH
Limestone quarry – natural source of Calcium Carbonate
Natural Source

From Ancient Limestone
to Modern Industry

Extracted from the world's finest deposits — limestone, marble & chalk — then precision-engineered to exact industrial specifications.

3 Billion+Tons Global Reserve
35+Years Processing
10+Mining Units
Naturally occurring
High purity grades
Consistent quality
Global supply
Cost effective
Advantages

Key Benefits

Why calcium carbonate is the preferred choice for industry leaders worldwide

01

High Whiteness & Brightness

Provides exceptional whiteness and brightness index, improving the aesthetic quality of finished products across all applications.

02

Chemical Inertness

Chemically stable and non-reactive with most substrates, ensuring long-term durability and stability in formulations.

03

Cost Effectiveness

Reduces total raw material costs without compromising quality. Can partially replace expensive inputs like TiO₂.

CaCO₃
97%+Whiteness
6Key Benefits
10+Industries
04

Versatile Applications

Suitable for paints, plastics, paper, rubber, adhesives, pharmaceuticals, and construction materials.

05

Environmental Safety

Naturally sourced, non-toxic, and environmentally benign. Fully compatible with regulated and sustainable use requirements.

06

Consistent Quality

Stringent quality control ensures batch-to-batch consistency in particle size, whiteness, and chemical composition.

Industrial manufacturing excellence
World Class Quality

Industry-Leading Performance
at Every Scale

Trusted by leading manufacturers across 50+ countries for consistent, high-purity calcium carbonate that meets international standards.

ISO 9001 EcoVadis Gold REACH Compliant Lab Certified
ISO Certified
Global Supply
Lab Tested
Industry Leading
Product Range

Available Grades

Comprehensive range of calcium carbonate grades for diverse industrial applications

Precision quality testing of calcium carbonate grades

Precision Engineered Grades

Every grade is meticulously tested in our state-of-the-art laboratories to meet the most demanding industrial specifications worldwide.

Whiteness97%+
Particle Size0.7–44μm
CaCO₃98%+
CertifiedISO
Natural

Ground Calcium Carbonate

GCC

Produced by grinding and classifying natural limestone/marble to achieve desired particle sizes for multiple applications.

  • 2–44 micron range
  • High purity (98%+)
  • Low oil absorption
Learn More
Most Popular
Synthetic

Precipitated Calcium Carbonate

PCC

Synthetically produced with controlled morphology for superior whiteness, narrow particle size, and high purity.

  • 0.7–3 micron range
  • Controlled morphology
  • Superior whiteness
Learn More
Treated

Surface-Coated Grades

Stearic Acid Coated

Surface-modified with stearic acid for improved dispersion, reduced moisture uptake, and better compatibility with polymers.

  • Enhanced dispersion
  • Reduced moisture
  • Polymer compatible
Learn More
Optimized

Density-Optimized Grades

Engineered CaCO₃

Blended to achieve target specific gravity for paints, putties, and coatings where density plays a key performance role.

  • Targeted density
  • Customizable SG
  • Exterior grade
Learn More
Product Statistics
5Grade Categories
25+Product Variants
0.7–44Micron Range
Request Custom Grade
Advanced

Ultrafine & Nano Grades

Nano CaCO₃

Used in inks and high performance coatings for gloss and transparency adjustment in premium applications.

  • Sub-micron particles
  • High gloss finish
  • Transparency control
Learn More
ISO 9001 Certified Global Delivery Technical Support Custom Solutions
Applications

Industries & Applications

Versatile applications across diverse industry verticals worldwide

Paints & Coatings

Paints & Coatings

Emulsions, primers, decorative paints and wall putties with high loading capacity for superior coverage.

DecorativeIndustrialPrimers
40%Filler Loading
Plastics & PVC

Plastics & PVC

Enhances stiffness, dimensional stability, and processability in polymer applications.

PVCPP & PEEngineering
60%Cost Savings
Paper Industry

Paper Industry

Improves hiding power, slip and printability; may replace or modify TiO₂ in formulations.

WritingPackagingSpecialty
97%Brightness
Adhesives & Sealants

Adhesives & Sealants

An economical filler to enhance bulk and mechanical properties in bonding applications.

ConstructionIndustrialCaulks
25%Strength Boost
Rubber & Construction

Rubber & Construction

Employed in rubber articles, sealants, caulks and cement-based systems for durability.

RubberCementBuilding
35%Loading Rate
Pharma & Agriculture

Pharma & Agriculture

Calcium supplement and antacid preparation with high purity grades for specialized applications.

PharmaFeedSoil
99%Purity
10+Industries
25+Applications
50+Countries
1000+Customers

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Our Promise

Why Choose 20 Microns?

World-class quality minerals backed by decades of expertise & innovation

20 Microns state-of-the-art manufacturing facility

Years of
Excellence

ISO 9001
EcoVadis
Gold Rated
Certified

Our calcium carbonate is extracted from the finest deposits worldwide and processed with advanced grinding and surface treatment technologies. We provide reliable quality, consistency of performance and technical support.

Premium Quality

Extracted from finest deposits worldwide

Advanced Processing

State-of-the-art grinding technology

Consistent Quality

Reliable performance batch after batch

Technical Support

Expert assistance for your applications

Start Your Journey With Us
Key Metrics
10+Manufacturing Units
50+Countries Served
1000+Happy Customers
35+Years Experience
EcoVadis Gold Sustainability Rating
10+Manufacturing Units
R&DInnovation Center
24/7Global Logistics
ExpertTechnical Team
Knowledge Base

Frequently Asked Questions

Get answers to common questions about Calcium Carbonate

Knowledge Center

Find detailed answers about specifications, applications, and technical details.

5Questions
24/7Support
TechnicalApplicationsGradesQuality

Still Have Questions?

Our team is here to help

Contact Us
01

Why is calcium carbonate used in paints?

Calcium carbonate provides whitening, opacity, rheology control, and mechanical strength while significantly reducing formulation costs. It serves as a primary extender pigment and improves overall application characteristics.

Whitening Opacity Cost Reduction
02

What forms of calcium carbonate are available?

Both natural (GCC) and synthetic (PCC) are available, depending on your specific performance needs and application requirements.

GCC PCC Coated
03

Is calcium carbonate suitable for outdoor coatings?

Yes, it is commonly used in exterior paints where cost and opacity are priorities. Our density-optimized grades are specifically designed for exterior coating systems.

Exterior Use Weather Resistant
04

How does calcium carbonate compare with dolomite?

Dolomite offers higher hardness (Mohs 3.5–4) and better scrub resistance. Calcium carbonate is preferred for higher whiteness, smoother finish, and better dispersion in premium coatings.

Higher Whiteness Smoother Finish
05

What particle sizes are available?

We offer a comprehensive range from 0.7 microns to 44 microns, including ultrafine and nano grades for specialized applications.

Nano Ultrafine Standard

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Our technical experts are available to provide detailed answers

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Industry Applications

Product Applications

Calcium Carbonate serves as a critical input across diverse industrial sectors worldwide

01

Cosmetics

Mild abrasive and gentle filler in beauty and personal care formulations.

02

Ceramic

Flux and whitening agent in ceramic bodies and specialty glazes.

03

Plastic & Polymer

Enhances stiffness, dimensional stability and processability in polymers.

04

Rubber

Reinforcing filler and processing aid in rubber articles and tyres.

05

Paints & Coatings

High loading capacity filler for emulsions, primers and decorative paints.

06

Paper & Boards

Improves brightness, opacity, printability and surface smoothness in paper.

07

Adhesive & Sealants

Economical filler enhancing bulk and mechanical strength in bonding systems.

08

Animal Feed

Calcium supplement and mineral carrier in livestock and poultry nutrition.

09

Construction

Key component in cement, mortars, concrete and construction sealants.

10

Leather

Surface treatment and finishing agent for premium quality leather goods.

11

Brake Composite

Friction modifier and filler material in automotive brake compositions.

12

Welding Electrodes

Coating component that improves arc stability in welding electrode production.

13

Inks & Pigments

Extender pigment and substrate in printing inks and specialty colorants.

14

Oil & Gas

Weighting agent and drilling fluid additive in oil and gas exploration.

14+Application Sectors
25+Product Grades
50+Countries Served
1000+Industry Clients
Calcium Carbonate industrial applications worldwide
Global Industrial Reach

Powering Industries Across
50+ Countries

From cosmetics to oil & gas — calcium carbonate is the essential mineral behind thousands of products you use every day.

Need a Specific Grade for Your Application?

Our experts will guide you to the perfect calcium carbonate solution

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Product Video

See It In Action

Watch how 20 Microns' Calcium Carbonate powers real-world industrial applications

Calcium Carbonate in Action – 20 Microns
YouTube
Official Product Film

Calcium Carbonate - Industrial Applications

20 Microns Limited · Official Channel

About This Video

Discover how 20 Microns' Calcium Carbonate grades deliver superior performance across industrial applications.

  • Product manufacturing overview
  • Quality control processes
  • Application demonstrations
  • Global supply capabilities
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