With the advent of mass production during the Industrial Revolution, hydrochloric acid was used in the chemical industry as a pure reagent in the large-scale production of vinyl chloride for VVC plastics and MDI / TDI for polyurethane. It also has many small-scale uses, including housekeeping, making gelatin and other food additives, descaling, and tanning. About 20 million tons of hydrochloric acid are produced annually in the world.

Jabir bin Hayyan is also said to have discovered the acid. This acid is used for scaling from different levels. Hydrochloric acid is also present in the stomach and helps digest food. Inhalation of hydrochloric acid vapor is dangerous and damages the respiratory system. If a drop of it drips on the skin of the body, blisters can form even deep wounds. In such cases, the acid effect should be neutralized immediately with a dilute alkaline solution such as baking soda.

Due to the need to maintain environmental health along with production activities, this production unit with an annual capacity of more than 70,000 tons, converts the exhaust gases of factory furnaces in a chemical process into hydrochloric acid with a quality of 33%. Hydrochloric acid or salt ink (HCI) with a purity of 30-33% (w) is a by-product in the process of producing potassium sulfate and due to its independence from the general market policies and industries that produce this substance as the main product, the time of independence In determining the price and sales policy for this product, it is provided to the consumer industries. It should be noted that due to the Mannheim production method and the lack of metal in the structure of production reactors, it is possible to produce quality acid with the lowest percentage of metal contamination.

In parallel with the production of potassium sulfate chemical fertilizer, the company has also sent the by-product of hydrochloric acid to meet the needs of manufacturing companies such as steelmakers, gelatin producers, detergents, oil well drilling, and other consumers.


Hydrochloric acid is prepared by dissolving hydrogen chloride in water. Hydrogen chloride can be produced in a variety of ways, and this means that there are many ways to make hydrochloric acid. Large-scale production of hydrochloric acid is almost always done on an industrial scale with other materials.

Properties of hydrochloric acid

The physical properties of hydrochloric acid, such as boiling point and melting point, density, and pH depend on the concentration or molarity of HCl in aqueous solution, ranging from water properties at concentrations close to 0% acid to heater values of hydrochloric acid at more than 40%.
Hydrochloric acid as a binary mixture of HCl and H2O azeotropes has a constant boiling point at 20.2% HCl and 108.6 ° C (227 ° F). Four eutectic points of crystallization constant for hydrochloric acid, between the crystalline forms HCI.H2O (٪ 60 HCI) and HCI.2H2O (51% HCI) and HCI.3H2O (41% HCI) and HCI.6H2O (25% HCI) and There is ice (0% HCI). There is also a fixed point of 24.8% between ice and HCI.3H2O crystal.

Some applications of hydrochloric acid

– In steel acid washing
– In the production of organic compounds
– In the production of inorganic compounds
– In control (PH) and neutralization
– In the reconstruction of ion exchangers

Some of our customers:

About Us:

Asia Potash Industry Company, the largest producer of potassium sulfate in Iran, was established in 1390 with a capital of 1000 billion Rials and on a land area of 70,000 square meters. The purpose of establishing the company was to produce 200,000 tons of chemical fertilizer of potassium sulfate annually and to meet the domestic needs of farmers and gardeners in the country.

 Central office:

Unit 12, first floor, No. 6, between the second and fourth alleys, South Gandi St., Tehran, Iran

021-88886036  |  021-88661842


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