Calcium hydroxide

Molecular formula:
Ca(OH)2
Chemical compound:
calcium hydroxide
Common name:

Ca(OH)2 – сalcium hydroxide – is a white powder that is quite insoluble in water. This compound is also called slaked lime, caustic lime, and hydrated lime. It is used as a special reagent in water and sewage treatments – it forms a fluffy solid that can remove smaller particles from water and contribute to a clearer product. It is also used to neutralize acidic solutions (including wastewater from manufacturing). It is widely used in the construction industry. Ca(OH)2 is often added to whitewash, mortar, and plaster. It is also used as a disinfectant in root canal procedures.

Similar reagents

Experiments with similar reagents

Hazard information

Hazard statements

  • Causes eye irritation.

Precautionary statements

  • Wear protective gloves/protective clothing/eye protection/face protection.
  • IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do – continue rinsing.
  • Immediately call a POISON CENTER/doctor/…