Alkalis are a set of substances produced from alkali metals. These substances are more destructive to the skin than most acids, among their properties is that of being soluble in water, their solutions transfer electrical current, create soapy compounds when in contact with water, in high concentrations they can cause chemical burns , so it is important to exercise caution when using them.

Alkali metals are made up of common elements such as potassium, sodium, calcium and magnesium. These metals are very reactive, especially with elements with higher atomic numbers than those with smaller numbers. This means that they are prone to losing an electron to have an overall positive charge and mix with halogen, such as chlorine.

Alkalis are so reactive that they are almost never found in their pure natural state. When mixed with water they react so powerfully that they can cause an explosion. These reactions in water produce a hydroxide, such as sodium hydroxide and potassium hydroxide. The most used names of these substances are: alum, lime, bleach, soda, chlorine, ammonia. Substance widely used by people for cleaning and manufacturing.

Sodium hydroxide or caustic soda is an extremely corrosive alkali, it is used in industry for the manufacture of detergents, textiles, paper and other materials. As a domestic use, it is used to unclog the drains of the house since these salts easily dissolve the organic substances present in the pipes.

Potassium hydroxide is of inorganic origin and, like sodium dioxide, is part of the powerful alkalis. It is used for dyeing leathers, cleaning drain pipes, and in cuticle removers.

Ammonia is an alkali whose chemical composition is formed naturally, it is characterized by having a strong and annoying odor, it generally comes in gaseous form and is easy to dissolve in water. It is used for industrial use, cooling agent, bleaching agent, fertilizer manufacturing, household cleaning, among others.