calciumhydroxid

Calcium hydroxide, also known as slaked lime or hydrated lime, is a chemical compound with the formula Ca(OH)2. It is a white, powdery solid that is produced by reacting calcium oxide (quicklime) with water. This process is called slaking. Calcium hydroxide is sparingly soluble in water, forming a milky suspension called milk of lime, or a clear solution called limewater when the excess solid is allowed to settle.

The compound is a strong base and is used in a wide variety of industrial and domestic applications. It is commonly used in the construction industry as a component of mortar, plaster, and cement. In agriculture, it is used to neutralize acidic soils and as a component of pesticides. Calcium hydroxide is also employed in water and wastewater treatment to adjust pH and remove impurities. In the food industry, it is used as a food additive (E number E526) for purposes such as firming agent, pH regulator, and leavening agent. It plays a role in the traditional nixtamalization process for corn.

Historically, calcium hydroxide has been used for medicinal purposes and in various artisanal crafts. It is a relatively inexpensive and readily available chemical, contributing to its widespread use across different sectors. When heated, calcium hydroxide decomposes back into calcium oxide and water.