Potassium carbonate (K₂CO₃) is a white, powdery, inorganic compound that is composed of potassium, carbon and oxygen. It is also known as potash, pearl ash, or potash soda. It has a slightly alkaline taste and is commonly used in a wide range of industrial and commercial applications.

One of the most common uses of potassium carbonate is in the manufacturing of glass. It is used as a flux to lower the melting point of silica and to improve the clarity and durability of the glass.

In the food industry, potassium carbonate is used as a food additive and a leavening agent in baking. It helps to increase the pH level of the dough, which improves the texture and volume of the finished product.

Potassium carbonate is also used in the production of soaps and detergents, as well as in the manufacture of other chemical compounds.

In the medical field, potassium carbonate is used as a laxative and as a treatment for acid indigestion and other stomach disorders.

It is also hygroscopic which means it absorbs moisture from the air.