How to Buy Calcium Carbonate

What is Calcium Carbonate?

Calcium carbonate is a chemical compound made up of calcium, carbon, and oxygen atoms. It's found naturally in rocks, such as limestone, marble, and chalk. Calcium carbonate is widely used in various industries, including construction, agriculture, pharmaceuticals, and food production.

In everyday life, you can find it in items like toothpaste, antacids, baking powder, and even as a filler in plastics and paints.

  • Formula: CaCO3
  • Other names: Aragonite; Calcite; Chalk; Lime; Limestone; Marble.
  • CaCO3 has the appearance of fine white powder with a chalky taste.
  • Specification:
    1. Calcium Carbonate 99% COA TDS
    2. Calcium Carbonate 99% MSDS
  • CAS number: 471-34-1
  • Hazard classification: nonhazardous - not a DOT controlled material in the US.

3 Main forms of Calcium Carbonate


3 Main forms of Calcium Carbonate

These are different forms of calcium carbonate found in nature and used in industry which you must know before buying calcium carbonate.

  1. Calcite: The most stable and least soluble form of calcium carbonate.
  2. Aragonite: Another form of calcium carbonate, found in some minerals and shells.
  3. Vaterite: A less common form of calcium carbonate, with different properties than calcite and aragonite.

In industry, calcium carbonate is often used in the form of a powder, and in lime products.

Types of Calcium Carbonate


Types of Calcium Carbonate

These are different types and grades of calcium carbonate, a common chemical compound used in various industries:

  1. Calcium Carbonate Dense(Industrial Grade)
  2. Calcium Carbonate Dense(Food Grade)
  3. Calcium Carbonate Light(Industrial Grade)
  4. Calcium carbonate Light(Food Grade)
  5. Calcium carbonate Nano Plastic(Food Grade)
  6. Calcium carbonate Nano Plastic(Industrial Grade)
  7. Calcium carbonate Nano Coating (Industrial Grade)
  8. Calcium carbonate Nano Coating (Food Grade)

You must choose the type of calcium carbonate according to your requirements.

Applications of Calcium Carbonate


Applications of Calcium Carbonate

There are diverse uses of calcium carbonate across industries such as construction, agriculture, pharmaceuticals, and food production. Here we will see in detail:

1. Calcium Carbonate in Construction Industry

  • Used as a building material in its own right (e.g. marble), and as an ingredient of cement.
  • Contributes to the making of mortar used in bonding bricks, concrete blocks, stones, roofing shingles, rubber compounds, and tiles.
  • CaCO3 decomposes to form carbon dioxide (CO2) and lime, an important material in making steel, glass, and paper.
  • Used in industrial settings to neutralize acidic conditions in both soil and water.

2. Calcium Carbonate in Paper, Paint & Coatings

  • Used as filter as a coating pigment
  • Used as an inexpensive filler to make bright opaque paper
  • Used as an extender by weight in paints

3. Calcium Carbonate in Rubber Industry & Agricultural

  • Used to control viscosity, heat expansion coefficient, product shrinkage.
  • Used as an additive in the production of pesticides and poultry food in the agricultural industry.

Calcium Carbonate 99% available for sale at Camachem.

4. Calcium Carbonate for Wastewater Treatment

  • Remove inorganic and organic pollutants from the environment through adsorption
  • Acts a coagulant to sweep particles out of solution

5. Calcium Carbonate in Plastic Industry

  • Improve the dimensional stability of plastic products, such as improve the product hardness, electrical efficiency, flame
  • Improve the gloss and evenness of the product surface
  • Improve the heat resistance of conventional plastic products

6. Calcium Carbonate for Personal Health & Food Production

  • Used as dietary calcium supplement
  • Used as an essential element in toothpaste

Camachem Packaging of Calcium Carbonate CaCO3


Camachem Packaging of Calcium Carbonate CaCO3

At Camachem, there are 4 options of weight capacity with PPPE bags to fit with client’s requirements:

  1. 25kg/PPPE bag
  2. 50kg/PPPE bag
  3. 1000kg/PPPE bag
  4. 1250kg/PPPE bag

You can choose your calcium carbonate bag according to your needs.

How to Choose Correct Calcium Carbonate


How to Choose Correct Calcium Carbonate

Different grades of industrial calcium carbonate may vary in terms of particle size distribution, brightness, chemical purity, and other properties, depending on the intended use.

It's important to source it from reputable suppliers who adhere to food safety regulations and provide products that are labeled as "food grade" to ensure they are suitable for use in food processing and production.

Additionally, it's crucial to follow recommended usage levels and guidelines provided by food safety authorities to ensure the safe and appropriate use of products.

1. Calcium Carbonate Dense

"Dense" calcium carbonate typically means it's packed tightly with high bulk density. Bulk density measures how closely a substance is packed in a volume. Industries often choose dense calcium carbonate for more material in less space, which helps in manufacturing.


Calcium Carbonate 99% available for sale at Camachem.

Depending on the purpose of using calcium carbonate in each industry, the manufacturer should choose the appropriate grade to save manufacturing costs:

  • Industrial grade - Dense industrial-grade calcium carbonate typically has a high purity level and controlled particle size to meet the specific needs of industries where it is employed.
    1. Paper Industry: used as a filler material in the production of paper, where it improves the paper's whiteness, opacity, and smoothness.
    2. Paints and Coatings: used as a filler and extender in the production of paints and coatings to enhance the coverage, durability, and rheological properties of these products.
    3. Plastics Industry: used as a filler to reduce production costs, increase stiffness, and improve various properties of plastic products.
    4. Construction Industry: used to improve workability and provide certain desired properties of cement, concrete, and mortar.
    5. Adhesives and Sealants: used as a filler in adhesives and sealants to enhance their performance.
    6. Pharmaceuticals: used as a dietary supplement in pharmaceuticals and also as an antacid to relieve heartburn, acid indigestion, and upset stomach.
    7. Food Industry: used as a food additive (E170) and a white food coloring agent in products like toothpaste and baking powder.
    8. Environmental Remediation: used in wastewater treatment processes to control pH levels and remove impurities.
    9. Agriculture: used as a soil conditioner to neutralize acidic soils and provide essential calcium to plants.
  • Food grade - refers to a specific quality and grade of calcium carbonate that is safe for consumption and approved for use in food products
    1. The European food additive number E170, generally recognized as safe (GRAS) by regulatory authorities in many countries, including the United States.
    2. Food Additive: used as a food additive in various food and beverage products, may be added for several purposes, including as a calcium supplement, a colorant, an anticaking agent, and as a pH regulator to adjust the acidity of certain foods.
    3. Calcium Supplement: a source of dietary calcium, which is an essential mineral for the human body and often added to foods like fortified cereals, orange juice, and dietary supplements to increase calcium intake.
    4. Colorant: used as a white food coloring agent to achieve a desired color or appearance in food products, such as white sauces, frosting, and certain candies.
    5. Anticaking Agent: used as an anticaking agent to prevent powdered or granulated food products, such as salt, sugar, and baking powder, from clumping and forming lumps due to moisture absorption.
    6. pH Regulator: used as a pH regulator to adjust and stabilize the acidity or alkalinity of certain foods and beverages.

2. Calcium Carbonate Light

Calcium Carbonate Light refers to a type of calcium carbonate that has a lighter density compared to other forms. It is commonly used in various industries for its specific properties and applications.

Calcium Carbonate 99% available for sale at Camachem.  Calcium Carbonate Light

Choose reputable suppliers for calcium carbonate light that meet quality and safety standards. Selection of grade and formulation depends on specific performance needs.

  • Industrial grade - characterized by its lower bulk density ("light" indicates that it has a lower density compared to "dense" calcium carbonate).
    1. Same as dense, calcium carbonate “light” is also applied in various industries such as coatings and paints, paper and pulp, pharmaceuticals, agriculture and environmental remediation.
    2. Besides the industries listed above, light calcium carbonate is also used as the filler material: used as a filler material in the production of various products, such as plastics, rubber, adhesives, sealants, and construction materials to improve product characteristics like stiffness, texture, and cost-effectiveness.
  • Food grade 
    1. Used as calcium carbonate dense, but processed as “light” to save the cost of processing and packaging.

3. Calcium Carbonate Nano Plastic

"Nano" denotes the extremely small particle size of the calcium carbonate, typically in the nanometer range (1 nanometer equals one billionth of a meter).

The distinctive feature of calcium carbonate nano plastic is its ultrafine particle size. The nano-sized particles have a much larger surface area per unit mass compared to conventional calcium carbonate, which can impart specific properties to the plastic products.

Calcium Carbonate 99% available for sale at Camachem.

Choose reputable suppliers for calcium carbonate nano plastic that meet quality and safety standards. Selection of grade and formulation depends on specific performance needs.

  • Industrial grade - refers to a specific quality and grade of calcium carbonate that is finely ground to nano-scale particles and is intended for use in the plastics industry.
    1. Used as a reinforcement agent in plastics to enhance the mechanical properties of plastic materials, including tensile strength, stiffness, and impact resistance. This makes them valuable in the development of high-performance plastics.
    2. Improved Optical Properties: improve the optical properties of plastics, such as transparency and color dispersion.
    3. Reduced Material Usage: Due to their small particle size and high surface area, it can be used in smaller quantities compared to larger particle sizes to achieve the same or even better results. This can lead to cost savings in production.
    4. Barrier Properties: enhance the barrier properties of plastic materials, making them more effective at blocking the passage of gases, moisture, and other substances. This is particularly useful in packaging applications.
    5. Thermal Properties: influence the thermal properties of plastics, such as heat resistance and thermal conductivity.
    6. Reduced Environmental Impact: result in lighter and more environmentally friendly materials due to reduced material consumption and potential energy savings during processing.
  • Food grade: Calcium Carbonate nanoparticles are not typically used in the food industry due to the extremely small size of the particles. Therefore, it is not directly used as food additives or ingredients in food products, which turns back to the primary use of CaCO3 as larger particles.

4. Calcium Carbonate Nano Coating

Nano-sized particles provide high surface area per mass, benefiting coatings. Calcium carbonate nano coatings are used in various industries like automotive, aerospace, and electronics. To ensure effectiveness, strict adherence to safety and environmental regulations is crucial, considering factors like substrate type and coating process.

Calcium Carbonate Nano Coating

Choose reputable suppliers for calcium carbonate nano coatings that meet quality and safety standards. Selection of grade and formulation depends on specific performance needs.

  • Industrial grade - a specialized form that has been processed to have nano-sized particles and is designed for use as a coating material in various industrial applications.
    1. Improved Surface Properties: The nano-sized calcium carbonate particles can be used to modify the surface properties of various substrates and materials, such as metals, ceramics, polymers, and composites.
    2. Coating Thickness Control: provide precise control over the thickness of the coating, allowing for thin and uniform layers to be applied to surfaces.
    3. Enhanced Barrier Properties: improve the barrier properties of substrates, making them more resistant to moisture, chemicals, and environmental factors.
    4. Anti-Corrosion: used for their anti-corrosion properties to protect metal surfaces.
    5. Surface Modification: employed to modify the surface energy, adhesion, and other surface characteristics of materials to achieve specific performance goals.
    6. Optical Properties: Depending on the formulation, nano coatings may influence optical properties such as transparency, reflectivity, and color.
  • Food grade - Nano coatings, including calcium carbonate variants, offer unique properties for food and packaging. However, their use raises safety, regulatory, and health concerns.

Consider the following for nano coatings in food-related applications:

  1. Regulatory Approval: Ensure compliance with food safety regulations and safety assessments before considering any nano coating as food grade.
  2. Safety: Rigorous testing is crucial to confirm that nanocoatings do not pose health risks when in contact with food.
  3. Specific Applications: Choose nano coatings based on specific food-related needs, such as barrier properties, antimicrobial effects, or freshness preservation.
  4. Research and Development: Stay informed about evolving research and safety evaluations in the field of nanomaterials in the food industry.

Conclusion - Buying Calcium Carbonate


Buying Calcium Carbonate

In conclusion, selecting the right calcium carbonate product is crucial for various industries and applications. Consideration of factors such as particle size, purity, and intended use is essential in making an informed decision.

Additionally, sourcing from reputable suppliers who adhere to quality standards ensures the reliability and safety of the product. By carefully evaluating these factors and following recommended guidelines, industries can effectively utilize calcium carbonate to meet their specific needs while maintaining safety and quality standards.

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