Main areas and fields of ammonia use

Ammonia is one of the most important industrial chemicals. It is a compound of nitrogen and hydrogen with the formula NH3, a colorless gas with a sharp characteristic odor. It is produced in large volumes because ammonia is needed for fertilizers, chemical feedstock, refrigeration systems, cleaning products and many ammonium compounds.

The question of where ammonia is used is most often associated with agriculture and the chemical industry, but its use is not limited to these areas. Another point is important: ammonia is toxic, irritates mucous membranes and the respiratory tract, and at high concentrations is dangerous to people. Therefore, industrial use of ammonia always requires leak control, ventilation and safety rules.

Properties of ammonia

The physical and chemical properties of ammonia determine its main fields of use. Ammonia dissolves well in water, forming ammonia solution. It behaves as a base and reacts with acids to form ammonium salts. For example, the reaction of ammonia with nitric acid is used to produce ammonium nitrate, which is used in fertilizers.

Ammonia is also used as a chemical feedstock and reagent. In industry it is involved in the production of nitric acid, ammonium salts, urea, some amines and other nitrogen-containing products. In certain technological processes, liquid ammonia can act as a solvent, but such processes require special equipment.

Different uses of ammonia

Despite its toxicity, ammonia is used in many industries. Most produced ammonia goes into fertilizers and chemical products. The main areas include:

• fertilizers: ammonium nitrate, ammonium sulfate, urea and other nitrogen fertilizers;
• production of nitric acid by catalytic oxidation of ammonia;
• production of soda ash by the ammonia-soda process;
• production of ammonium salts and other nitrogen compounds;
• industrial refrigeration, where ammonia is used as refrigerant R-717;
• aqueous ammonia solutions for household and technical cleaning products;
• selected medical and laboratory uses of ammonia solution.

In agriculture, ammonia is important mainly as a source of fixed nitrogen. Fertilizers are produced from it and used for plant nutrition. At the same time, nitrogen fertilizers must be applied in controlled amounts: excess nitrogen compounds can worsen soil condition, pollute water and reduce crop quality.

Ammonia in refrigeration

Ammonia is used in industrial refrigeration systems as a refrigerant. It has good thermodynamic properties and a low global warming potential, so it is used in large cold stores, food production and other industrial systems. The main drawback is ammonia toxicity, which means equipment must be designed and serviced under strict safety requirements.

Medical and household use of aqueous ammonia

Household products do not use anhydrous ammonia directly, but its aqueous solution. It is included in some cleaning products and helps remove grease, marks on glass, ceramics and metal. Such products must not be mixed with chlorine-containing cleaners and should only be used according to instructions.

In medicine, ammonia solution is known as smelling salts or spirit of ammonia in some contexts. It may be used as an irritant for brief inhalation in fainting situations and in some external preparations. Taking ammonia internally or using it for self-treatment is dangerous. Any medical use must follow instructions and professional advice.

Ammonia remains important for the chemical industry, agriculture and refrigeration. Its usefulness is directly connected with proper handling: it is effective in production, but requires caution because of its toxicity and irritating action.