Uses of Sulphuric Acid: Industrial, Commercial and Everyday Applications Explained with Examples

Sulphuric acid is one of the most important chemicals used in the world today. It is a strong mineral acid with the chemical formula H₂SO₄. Because of its wide range of applications in industries, laboratories, agriculture and daily life, it is often called the “king of chemicals.”

This article explains the uses of sulphuric acid and its major industrial, laboratory and commercial applications.

Table of Contents 

• What is Sulphuric Acid
• Major Industrial and Commercial Uses of Sulphuric Acid
• Laboratory Applications of Sulphuric Acid
• Frequently Asked Questions on Uses of Sulphuric Acid

What is Sulphuric Acid

Sulphuric acid is a strong mineral acid with the chemical formula H₂SO₄. It is a colourless, odourless, dense, and oily liquid that dissolves readily in water and releases a large amount of heat during dilution.

Basic Information

Property	Value
Chemical Formula	H₂SO₄
Molar Mass	98.08 g/mol
Nature	Strong Acid
Appearance	Colourless Oily Liquid
Solubility	Highly Soluble in Water
Common Name	Oil of Vitriol

Also Read: Sulphur and Sulphur dioxide

Major Industrial and Commercial Uses of Sulphuric Acid

1. Manufacture of Fertilisers:The largest use of sulphuric acid is in the fertiliser industry.

It is used to produce:Superphosphate of lime and Ammonium sulphate

These fertilisers:

• Supply essential nutrients to plants.
• Improve soil fertility.
• Help control soil acidity or alkalinity.

2. Chemical Manufacturing:Sulphuric acid is an important raw material in the chemical industry.

It is used to manufacture:

• Nitric acid
• Hydrochloric acid
• Sulphate salts
• Various organic chemicals

It also helps in producing alkylating agents used in chemical synthesis.

3. Production of Detergents:Sulphuric acid is used to prepare:LABSA (Linear Alkyl Benzene Sulphonic Acid) and Acid slurry.

These substances are important ingredients in:

• Washing powders
• Liquid detergents
• Soaps

4. Dye and Pigment Industry:Many dyes and pigments are manufactured using sulphuric acid.A major example is titanium dioxide (TiO₂), a white pigment widely used in:Paints, Plastics,Paper and Cosmetics

5. Petroleum Refining:In the petroleum industry, sulphuric acid is used to:

• Remove impurities from crude oil.
• Refine gasoline, diesel, and jet fuel.
• Extract sulphur compounds from petroleum products.

This improves the quality of fuels and reduces pollution.

6. Metal Processing:Sulphuric acid is widely used for pickling of metals.

Pickling removes:Rust,Oxide layers and Impurities from iron and steel.This cleaning is done before processes such as galvanisation and metal coating.

7. Textile and Rayon Industry:During the manufacture of rayon (regenerated cellulose), cellulose fibres are treated and then passed through concentrated sulphuric acid to form rayon threads.

8. Lead-Acid Batteries:Sulphuric acid serves as the electrolyte in lead-acid batteries used in:cars,trucks,UPS systems and power backup units.

9. Pharmaceutical Industry: In medicine manufacturing, sulphuric acid is used:as a solvent, In chemical synthesis and for preparing certain pharmaceutical intermediates.

10. Paper and Water Treatment Industry: Sulphuric acid helps in producing chlorine dioxide, which is used for bleaching paper pulp, treating drinking water and disinfection processes.

Laboratory Applications of Sulphuric Acid

In chemistry laboratories, sulphuric acid is commonly used:

• As a strong acid reagent.
• As a dehydrating agent.
• As an oxidising agent.
• As a catalyst in many reactions.

As a Dehydrating Agent:

Concentrated sulphuric acid removes water from substances.

For example, when added to sugar, it removes water and leaves behind black carbon. 

As a Catalyst

Sulphuric acid catalyses many industrial reactions, including:

• Esterification reactions (formation of esters).
• Production of nylon intermediates.
• Manufacture of high-octane fuels.

Other Important Applications

Agriculture: Farmers sometimes use dilute sulphuric acid solutions to dry potato plant tops before harvesting, making harvesting easier. 

Household Cleaning:Traditionally, sulphuric acid has been used in some drain cleaners and toilet cleaning products because of its strong cleaning action.

Preparation of Special Cleaning Solutions: It is used with hydrogen peroxide to prepare Piranha solution, a powerful cleaning agent used in microelectronics.

We have learned that Sulphuric acid is one of the most widely used and economically important chemicals in chemistry. Its unique properties make it essential for manufacturing fertilisers, detergents, medicines and countless industrial products. It also serves as an oxidising agent, dehydrating agent, catalyst, and laboratory reagent.