What is Ammonium Chloride?
NH4Cl is an inorganic compound with chemical name Ammonium Chloride. It is also known as sal ammoniac, the salt of ammonia and hydrogen chloride. It is a by-product of sodium carbonate. It has diuretic and expectorant effects. In its pure form, it is crystalline salt, white. This compound is highly water-soluble and mildly acidic. It is used in veterinary medicine in the prevention of urinary stones in sheep, goats, and cattle. When ammonium sulfate and NaCl solutions react, NH4Cl is produced. When a 5% solution of ammonium chloride (by weight) is mixed with water, the resulting solution has a pH value ranging from 4.6 to 6.0.
Properties of Ammonium Chloride
|Molecular Weight/ Molar Mass||53.491 g/mol|
|Boiling Point||520 °C|
|Melting Point||338 °C|
Structure of NH4Cl
Uses of Ammonium Chloride
- It is used in fertilizers as a nitrogen source.
- It is used in medicine (especially in cough medicine) as an expectorant.
- It is used in glue which helps to bond plywood.
- It is used in Leclanche cells in aqueous solutions.
- It is used in food additives – in bread making as a yeast nutrient.
- It is used as an acidifier.
- It is used in cooling baths to create low temperatures.
- They are used as buffer solutions along with ammonia.
- It is given to cattle as feed supplements.
Frequently Asked Questions
What are the uses of ammonium chloride?
The primary use of ammonium chloride is as a source of nitrogen in fertilizers (corresponding to 90 per cent of ammonium chloride production worldwide) such as chloroammonium phosphate. Rice and wheat are the principal crops fertilized in this way. Ammonium chloride is also used as a flux to prepare metals for grinding, galvanizing, or soldering in nickel.
How is ammonium chloride prepared?
Ammonium chloride is produced as one of the products in the Solvay process for the production of sodium carbonate. This compound can also be prepared on an industrial scale by reacting ammonia with hydrochloric acid or gaseous hydrogen chloride. Ammonium chloride is known to occur naturally in certain volcanic areas.
What happens when ammonium chloride is heated?
When heated, ammonium chloride undergoes a decomposition reaction to yield ammonia and gaseous hydrogen chloride as the products. Although this process appears similar to sublimation processes, the change is chemical and not physical.
Learn more about the structure and the physical and chemical properties of NH4Cl from the experts at BYJU’S.