Calcium hydroxide, commonly referred to as slaked lime, is described by the chemical formula Ca(OH)₂. It is an inorganic compound which has a white, powdery appearance in its solid-state. However, Ca(OH)₂ has a colourless appearance in its crystalline form.

The alternate names of this compound include hydrated lime, slack lime, pickling lime, and caustic lime. Generally, calcium hydroxide is prepared by mixing water and calcium oxide (also known as quick lime).

Properties of Calcium Hydroxide

Chemical Formula : Ca(OH)₂

Appearance : White powder or colourless crystal

Molecular Weight/Molar Mass : 74.093 grams per mole

Density : 2.211 grams per cubic centimetre

Melting Point : 853 K

Uses of Calcium Hydroxide

In the process of sewage treatment, calcium hydroxide is used as a clarifying agent or as a flocculant.

Ca(OH)2 is used in the paper industry during the Kraft process of converting wood into wood pulp.

It is a very important compound in the preparation of ammonia.

This compound is also used as a pH modifier due to its basicity.

The pickling of cucumbers is generally done with the help of Ca(OH)₂

The production of many plastics involves the use of calcium hydroxide as an ingredient.

It is also used in pesticides, hair care products, and the manufacture of ebonite.

In root canal procedures, this compound is used to fill the cavities in the human teeth.

Sugar beets and sugarcane are processed via carbonation, which involves the use of Ca(OH)₂.

Calcium hydroxide is used in the leather industry to separate the fur/hair from the animal hide.