Sulphuric Acid:

Sulphuric acid also spelled Sulfuric (H2SO4), also called as Oil Of Vitriol, and Hydrogen Sulfate, colorless, oily, dense, corrosive liquid. One of the most important of all in chemicals, and organized industrially by the response of water with sulfur trioxide, which in turn is made by chemical mixture of sulfur dioxide and oxygen also by the contact process and the chamber process. Sulfuric acid is a very powerful acid in aqueous solutions it ionizes totally to fandom hydronium ions (H3O+) and the hydrogen sulphate ions (HSO4−). In reduce solutions the hydrogen sulfate ions also dissociate, fading made hydronium ions and sulfate ions (SO42−).

Sulfuric acid is the most important industrial chemicals. Made of it is every year than is made of any additional manufactured chemical made than 40 million tons of it was produced in the United States in 1990? It has generally different uses and plays some part in the manufacture of practically all manufactured goods. The most important uses of sulphuric acid are in the creation of fertilizers e.g., super phosphate of lime and ammonium sulphate.

It is extensively used in the manufacture of chemicals e.g., in making hydrochloric acid, nitric acid, sulfate salts, synthetic detergents, dyes and pigments, explosives, and drugs. It is used in petroleum cleansing to wash impurity out of petrol and other refinery products. Sulphuric acid is used in the processing metals e.g., in cleaning iron and steel became plating them with tin and zinc.

Uses of Sulphuric Acid:

  1. In the manufacturing of fertilizers similar to ammonium sulfate as well as super phosphate of lime.
  2. Sulphuric acid is uses of manufacturing the hydrochloric acid, nitric acid, phosphoric acid, ether, plastics, metal sulfates, cellophane, dyes, drugs, perfumes, disinfectants, and glue.
  3. In the manufacturing of hydrogen through the sulphur iodine cycle, this is a series of thermo-chemical reactions.
  4. In the manufacturing of explosives, nitroglycerin acid, and tri-nitro-toluene (TNT).
  5. In the manufacturing of sodium phosphate, this is a detergent.
  6. In potato agricultural, where it is sprayed on the potato fields became harvesting, to create the stems die out speedily.
  7. Removing impurities during the refining process of petroleum.
  8. As an electrolyte in lead-acid batteries.
  9. In the iron and steel-making industry and removing oxides from steel rolls became electroplating and galvanizing.
  10. In the manufacturing of pigments, such as paints and printing ink.
  11. In the chemical industry as a catalyst and important chemical reactions.
  12. As an active ingredient of domestic consume cleaners.

Sulphuric Acid Specifications


Commercial Grade

Battery grade (concentrated)


Liquid, not darker than brown in colour.

Colourless liquid. The acid on dilution with equal volume of distilled water, is free from suspended matter and other visible impurities.

Total acidity (as H2SO4) percent by mass, Min.



Residue on ignition



Iron as Fe



Chloride as CI



Lead as Pb



Arsenic as As



Oxidisable impurities as SO2



Organic matter


To pass test

Selenium as Se



Manganese as Mn



Copperas Cu



Zinc as Zn



Nitrates, nitrites & ammonia as N



Note : The requirement mentioned above are the same as those of IS 266 : 1993 (Technical Grade) except iron and total acidity as Sulphuric acid for battery grade acid. As per IS specification for battery grade acid (concentrated), total acidity is 95.0% Min. & Iron is 0.003% Max.



Sulphur. Acid 98% (Comm. Gr.)

  1. Dyes & Dyes Intermediates
  2. Drugs
  3. Chemicals
  4. Petro Chemicals
  5. Steel Pickling etc.
  6. Fertilisers
  7. Inorganic Salts
  8. Sulphonation

Sulphur. Acid 98% (Battery. Gr.)

  1. As Battery Acid
  2. Speciality Chemicals
  3. Drugs etc.