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Hydrated lime/ calcium hydroxide

Calcium hydroxide is an inorganic compound with the formula Ca(OH)2. It is a colorless crystal or white powder. It is also known as hydrated lime or slaked lime.


It has a boiling point of more than 1000oC and dissolves sparingly in water to give a highly alkaline solution of pH 12 to is manufactured by treating calcium oxide (quicklime) with water ( CaO + H2O → Ca(OH)2 ), in a process called "slaking." Also known as slack lime, builders lime or pickling lime, hydrated lime is used in the production of mortars, plasters, cements, paints, hard rubber products, petrochemicals, and in the tanning of leather.

Calcium oxide is stoichiometrically reacted with water in a controlled process to form a hydrated lime product that has the consistency of a fine white powder containing less than 1% residual moisture.. It is created by adding water to quicklime in order to turn oxides into hydroxides.


There are Three Type :

  • Quick Lime ( CaO )

  • Hydrated Lime  Ca(OH)₂

  • Lime Stone

It is necessary for calcium oxide (quicklime) to be slaked in a controlled environment because it can create heat that reaches up to 50 degrees Celsius. Calcium hydroxide, or hydrated lime, is already neutralized, so it will not undergo oxidation and can be mixed with water , for water ph control, lime slurry addition, lime slurry mixes, soil rehabilitation and more.


  • Also called calcium oxide.

  • Has a heavy density of 1 g / cm³.

  • Is a white, caustic, alkaline, and crystalline solid at room temperature.


  • Also called calcium hydroxide.

  • Has a density of 0.5 g / cm³.

  • Is a colorless crystal.

Uses :

  • Hydrated lime products are typically used in chemical manufacturing, water and wastewater treatment, acid neutralization and other environmental applications.

  • Hydrated lime plays a major role in construction applications for mortar and stucco applications as a soil-stabilizing material and as an anti-strip additive in asphalt.

  • Hydrated lime has applications as a sorbent in flue gas treatment for the control of SO2 and S03 emissions applications.


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