Calcium Hydroxide

Calcium hydroxide is an inorganic compound with the chemical formula Ca(OH)2. It is a colorless crystal or white powder and is obtained when calcium oxide is mixed or slaked with water. A suspension of Calcium hydroxide particles in water is called Milk of Lime; the particles give it the milky aspect


Molar Weight74.093 g/mol
Melting Point580 °C
Density2.211 g/cm³ (solid)
FormsPowder, Liquid, White, Colourless

Uses and Applications

Key applications

  • Beverage processing
  • Food and Nutrition
  • Wastewater treatment
  • Water treatment
  • Oil and Gas
  • Pulp and paper
  • Building & Construction products


  • Pulp & Paper
  • Pharma
  • Oil & Gas
  • Cleaning
  • Coatings & Construction
  • Polymers
  • Mining
  • Cosmetics
  • Water Treatment
  • Food
  • Agrobusiness
  • Lubricants
  • Chemical Processing
  • Rubber

Synonyms: Calcium dihydroxide, Slaked lime, Hydrated lime, Lime, Milk of lime, E526

Chemical Formula: Ca(OH)2

CAS Number: 1305-62-0