Ashok Mineral Enterprises, Chennai, India –  Manufacturer, Supplier and Exporter for Calcium Carbonate in Chennai, India and other parts of the world.

Here are some interesting facts about Calcium Carbonate (CaCo3):

Calcium carbonate (journal)


What is calcium carbonate common name/ generic name?

Calcium carbonate is commonly called as limestone.

Calcium carbonate chemical formula /symbol


calcium carbonate stone:

limestone (calcium carbonate; CaCO3)

Calcium carbonate molecular weight/ molar mass:

100.0869 g/mol

calcium carbonate equation/specification:

Calcite CaCO3

Refractive Index: 1.66-1.74

Specific Gravity: 2.71

(calcium carbonate hardness)Mohs Hardness: 3


Aragonite CaCO3

Refractive Index: 1.68-1.69

Specific Gravity: 2.95

Mohs Hardness: 3.5-4

Calcium carbonate Thermal properties:

Decomposition 1515 ,

Linear Expansion in./in.oF x 10-6  5.5-6.5 ,

Conductivity BTU/ft2,hr.,oF/in -4.3

Calcium carbonate to calcium oxide

Calcium carbonate is insoluble in water and stable at normal temperatures. When heated to high temperatures, it decomposes to form calcium oxide with the release of carbon dioxide.

CaCO3 →CaO + CO2

Calcium carbonate organic or inorganic:

It is an inorganic compound.

calcium carbonate structure:

Is calcium carbonate acid or base? : :

It is either acid or base

Calcium carbonate cas no :


Calcium carbonate hs code are :


Chalk Powder akaCalcium carbonate :

Chalk is a form of calcium carbonate, having the same chemical composition as ground calcium carbonate.

Calcium carbonate ore:

The mineral calcite is the major or sole constituent of most commercial calcium carbonate products. These include natural limestone, marble, and chalk, plus most precipitated calcium carbonate calcium.

Calcium carbonate powder:

Ground calcium carbonate: Natural calcium carbonate ores are high in chemical and mineralogical purity and are wet or dry, ground to a wide range of products. Dry-ground calcium carbonates, comprising nominal 200 to 325 mesh products, are among the least pricey white fillers available. They are simply crushed from ore but may also be beneficiated by air separation. Wet-ground fine and ultra fine products are also sold in 75% solids slurry form for high volume paint and paper applications and in stearic acid- and stearate-treated forms for use in polymers.

Precipitated calcium carbonate: Precipitated calcium carbonate (PCC) is produced for applications requiring any combination of higher brightness, smaller particle size, greater surface area, lower abrasiveness, and higher purity than is generally available from ground natural products. In the India. PCC is most commonly made by the carbonation process. Limestone controlled forcolouring oxides (e.g. of Mn and Fe) is calcined to calcium oxide and carbon dioxide. The calcium oxide (burnt lime) is then slaked with water to form calcium hydroxide (milk of lime). The carbon dioxide liberated on calcining is then reintroduced to precipitate calcium carbonate. Manipulation of process variables determines particle size and shape, surface area, and whether the product is isomorphous calcite or a cicular aragonite. PCC products are also made by the lime-soda process, where milk of lime is reacted with sodium.

Coated Calcium Carbonate Powder:

Coated Calcium Carbonate Powder is highly compatible with polymers than bare calcium carbonate and  therefore it is used as fillers in  rubber, plastic, paint, textile and sealant industries. Even though talc has a major position in plastics, it is losing market share to coated calcium carbonate, especially stearate coated fine 1-μm to 3-μm products. Coated Calcium Carbonates provide impact resistance but little stiffness. They work well in applications where the finished product is low in price and disposable, such as plastic grocery bags.

Activated Calcium Carbonate Powder:

Activated calcium carbonate is produced by surface coating the precipitated calcium carbonate slurry (a semi-liquid mixture) with fatty acids (stearic acid – a solid saturated fatty acid obtained from animal or vegetable fats) and titanate(a salt in which the anion contains both titanium and oxygen, in particular one of the anion TiO32−) coupling agent then filtering and drying of the coated pcc slurry to produce acc powder. The particle size, crystal form is specifically controlled by temperature, concentration of reactants and other process parameters. Activated Calcium Carbonate Powder is highly effective, precisely formulated, accurate composition. It is mainly used in plastic industry, pharmaceuticals, rubber industry, cosmetics, paints, printing ink, sealants and mastics.

calcium carbonate bioavailability:

Limestone is one of the minerals found in Japan, Jordan, Vietnam in some parts of India etc..

Many calcium carbonate deposits are the remains of the shells and skeletons of ancient sea life. Sedimentary rocks form by consolidation of loose sediment by biochemical, chemical, or mechanical processes. Biochemically or chemically deposited carbonate sedimentary rocks form the remains of living things, such as corals, clams, and other marine organisms that have the ability to secrete calcium carbonate, or they chemically precipitate directly from the water.Seawater contains various dissolved salts that will separate depending on their relative solubilities. Calcium carbonate, which is the least soluble, will separate out first and Highly soluble magnesium salts tend to separate last.

Applications of Calcium Carbonate:

Calcium carbonate uses in paint for (Coatings):

Ground natural calcium carbonate is the most generally used white pigment in paints because it is available at fairly low cost and has high brightness for TiO2 extension, high purity, low abrasiveness, and resistance to weathering.

Calcium carbonate uses as filler:

Both natural and PCC (Precipitated calcium carbonate) are paper, paint, adhesives and sealants, and polymers.

Calcium carbonate uses in Paper :

In alkaline paper making, calcium carbonate is used as a paper filler and coating, which require high brightness, high purity, small particle size, and lack of abrasion.

Calcium carbonate uses in Adhesives and sealants (bonding agents):

Calcium carbonate is also used as filler in adhesive and sealants. The calcium carbonate granules (Coarsest) grades of ground natural products are used at high loadings in drywall joint cements and in ready-mix adhesives for heavy wall tile.

Calcium carbonate uses in Polymers:

Ground natural calcium carbonate is used as filler in plastics due to its low cost, low abrasion, low oil absorption, low moisture, high brightness, and easy dispersion with conventional mixing tools.

Calcium carbonate other uses:

Substantial quantities of crushed and ground limestone are also used in the manufacture of portland cement, lime, glass, and metallurgical fluxes, as well as in flue gas desulfurization processes and as a soil amendment. Fine particle size products are used as a fire extinguisher foam filler, as an abrasive in domestic cleaners, as a flux in welding rod coatings, as a diluent in agricultural pesticide dusts, and as a dusting agent to mitigate the explosion potential of coal dust produced during underground mining.

Carbonate price

Generally regarded as the most common and cheapest white mineral filler, calcium carbonate powder uses. The major filler uses of calcium carbonate, both natural and PCC, are paper,paint, adhesives and sealants, and polymers.

Calcium carbonate processing/value addition

If a mineral has the essentialgeologic characteristics and can be mined economically, then thenext step is adding value through processing techniques such ascrushing, grinding, separation, classification, and surface treatment. The degree of processing increases theproduction cost of the material as well as the value of the material,but not always in direct proportion. Reducing the particle size of amineral is the most common way to derive additional value, but forcertain performance industrial minerals, including CalciumCarbonate,adhering to strict physical parameters such as particle size,shape, and distribution is equally important. This products also has a fairly rigorous chemical andcolor specification in additionto physical sizing requirements. The form in which the productis delivered (e.g., slurried, densified, pelletized), the package size,and method of delivery can also contribute greatly to the valueaddedbenefit of the material to the consumer. We at Ashok Mineral Enterprises tailor our CalciumCarbonate products to the specific requirements ofthe customers and end users.

Calcium carbonate GST:

Calcium carbonate, Coated Calcium carbonate and Activated Calcium carbonate gst percentage are 5%.  Precipitated Calcium carbonate  gst percentage is 18%

Different grades of CalciumCarbonate available at Ashok Mineral Enterprises:

We offer a Wide variety of

  • Ground Calcium Carbonate Powder (From 2 Microns to 75 Microns)
  • Calcium Carbonate Coarser grades (from 1 to 0mm)
  • Calcium Carbonate Chips / Limestone Chips
  • Coated Calcium Carbonate
  • Activated Calcium Carbonate
  • Precipitated Calcium Carbonate
  • Limestone Lumps