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An In-depth Review of the Calcium Sulfite Chemical Formula

ECHEMI 2021-12-07

An In-depth Review of the Calcium Sulfite Chemical Formula

Did you know what CALCIUM sulfite chemical formula is? This blog post will define it, provide its chemical formula, properties, how it is made, and its applications. Read on to learn more!

What Is Calcium Sulfite?

Calcium Sulfite is a white powder that is insoluble in water but soluble in alcohols or acids. Calcium Sulfite is also known as Calcium sulfite, Calcium salt or Sulfurous acid, calcium salt.

Properties of Calcium Sulfites

l Calcium sulfite is a white powder that is insoluble in water but soluble in alcohol or acids.

l It has a molecular weight of 120.14g/mol

l Its melting point is 600 degrees Celsius

l Calcium sulfite's solubility in water is 4.3 grams per 100 milliliters at 18 degrees Celsius

l Its exact mass is 119.9194059

l Calcium sulfite's monoisotopic mass is 119.9194059

l Its Hydrogen Bond Acceptor Count is 4

l Its Rotatable Bond Count is 0

l its Hydrogen Bond Donor Count is 0

l Covalently-Bonded Unit Count is 2

l It does not have any chiral centers

l It has a density of 3.01 grams per cubic centimeter

l Its refractive index is 1.590, 1.595, 1.628

l Its CAS registry number is 10257-55-3

Calcium Sulfite Chemical Formula

The Calcium Sulfite chemical formula is CaSO3. This means that for every molecule of calcium sulfite, there are 3 atoms of sulfur, 3 atoms of oxygen, and 2 atoms of calcium.

How To Make Calcium Sulfite

This process begins by adding sulfur to a hot concentrated solution of slaked lime. The temperature is kept at 70 degrees Celsius to form calcium sulfite during this reaction.

Calcium sulfite can also be made by heating sulfur dioxide with Calcium Carbonate or calcium hydroxide in an alkaline solution. The reaction between the sulfur dioxide and the calcium carbonate or calcium hydroxide is called a double replacement reaction.

Below is the Calcium chemical formula.

2CaCO3(s) + SO2(g) + H2O (l)= CaSO3 (s) + CO2(g) + H2O (l)


Applications Of Calcium Sulfite

Calcium sulfite has several uses. They include:

Used to Produce IDA

IDA stands for Industrial Diamonds. It is also known as fused quartz. The process used to produce IDA begins by heating calcium sulfite with sand at temperatures between 1650 and 1800 degrees Celsius in an electric furnace. This reaction forms calcium silicate, carbon monoxide, and silicon dioxide:

2CaSO3 (s) + SiO2(s)= CaSiO3 (s) + CO(g)

The calcium silicate from the above reaction is added to a mixture of sand and coke. The addition of this mixture to a crucible, which is surrounded by graphite bricks, forms the IDA product.

Paper Manufacturing

Calcium sulfite is used in the production of paper because it helps prevent the formation of lumps and improves the strength of the paper. It also helps to remove any unwanted colors from the paper.

Manufacturing Printing Inks

Calcium sulfite is also used in printing inks to improve the ink's strength and prevent it from fading.


Calcium sulfite is often used as a preservative because it helps to protect against bacteria, fungi, and molds. It also helps to extend the shelf life of food products.

Reducing Agent

Calcium sulfite can be used as a reducing agent in chemical synthesis. It helps to convert aldehydes and ketones into alcohol.

Soil Fertilization

Calcium sulfite has several uses in agriculture. It is often used to fertilize soils because of its ability to lower the soil's pH value. This helps to make phosphorus more available to plants. Calcium sulfite can also decrease the sodium content in soils, making it beneficial for growing certain crops.

Manufacture Of Glass

Glass manufacturers use Calcium sulfite to remove the greenish tinge from glass. The calcium sulfite and sodium carbonate reactions form sodium sulfite and sodium bisulfite. This reaction forms a molten glass that eventually becomes a solid. Calcium sulfite also helps reduce the amount of soda ash used in the manufacture of glass.

Manufacture of Soaps

Calcium sulfite is also used in the manufacture of soaps. It helps to produce a more rigid bar of soap, and it also helps to remove any unwanted colors from the soap.

Sugar Manufacturing

In sugar manufacturing, calcium sulfite is used to extract excess lime from a mixture. It also helps to remove sulfur dioxide from a polyphosphoric acid before an esterification reaction occurs between this substance and glucose.


Calcium sulfite chemical formula has many uses in various industries. Typically, the compound is a vital part of producing different items such as paper, printing ink, glass, soap, and sugar. For more information about Calcium sulfite, visit our website.

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