stands for material safety data sheet of calcium hydroxide – a very important document that shows general safety information about this chemical.

Chemical Product and Company Identification

The chemical name is calcium hydroxide
The chemical formula is Ca(OH)2
Synonyms of calcium hydroxide are Calcium hydroxide, hydrated lime, builders lime, slack lime, pickling lime, slaked lime.

Composition and Information on Ingredients
The lethal dose is around 7300mg/kg. Studies are made with rats and mice.


Hazards Identification

Ca(OH)2 is hazardous in eye contact, skin contact, ingestion and inhalation. It can easily damage the tissues and the damage depends on the length of the contact with the tissue. Calcium hydroxide is a strong irritant – can cause blindness when contacts the conjunctiva and irritation and blistering when contacts the skin and mucosa.

Ca oh 2 details and chemical formula

The calcium hydroxide is produced by mixing lime (CaO – calcium oxide) with water. Another name for this reaction is slaking. This is the cheapest way to produce CaOh2 which is used in a number of industries.

CaO + H2O = Ca(OH)2

Ca(oh)2 is a strong base. Therefore it can react with acids. The reaction is called neutralization:
The normal products from the neutralization are water and a salt.
Ca(oh)2 + HCl = CaCl2 + 2 H2O

You can also produce Ca(OH)2 in the laboratory by mixing aqueous solution of calcium chloride CaCl2 and sodium hydroxide NaOH:

CaCl2 + 2NaOH = Ca(OH)2+ 2NaCl

Ca(oh)2 has a polymeric structure like all the alkaline earth metal hydroxides.


Ca Oh 2 a.k.a Calcium hydroxide, hydrated lime, builders lime, slack lime, pickling lime, slaked lime is an inorganic chemical used in many industries. Obtaining calcium hydroxide is cheap and doesn’t need special equipment since Ca(OH)2 is not a toxic agent. Because of its -OH radicals the chemical is used for raising the pH of the water. It neutralizes the acids and regulates the pH. A typical characteristic for Ca oh 2 is that it doesn’t raise the pH to a very high level. That is because it achieves an equilibrium shown in the next formula:

Ca(OH)2 = CaO + H2O

It regulates the pH, keeps it high but not too much. Ca(oh)2′s self-regulation makes it perfect for water treatment and reducing the H+ in the water. These ions make the pipes corrode. It is either a colorless crystal or white powder easily soluble in water:

Ca(OH)2 = Ca2+ + 2OH-


Calcium hydroxide is produced by mixing water (H2O) with lime (CaO):

CaO + H2O = Ca(OH)2

This is the cheapest and most efficient method to produce slaked lime. Another way to obtain hydrated lime is by mixing sodium hydroxide with calcium chloride. Both NaOH and CaCl2 must be in aqueous solutions:

2NaOH + CaCl2 =2NaCl + Ca(OH)2


In the presence of carbon dioxide, calcium hydroxide can be carbonated – the result is calcium carbonate and water:

Ca(OH)2 + CO2 = CaCO3 + H2O





Ca + 2(H2O) = Ca(OH)2 + H2

2HNO3 + Ca(OH)2 = Ca(NO3)2 + 2H2O

2H3PO4 + 3Ca(OH)2 = 6H2O + Ca3(PO4)2

3H3PO4 + 5Ca(OH)2 = Ca5(PO4)3(OH) + 9H2O

HCl + Ca(OH)2 = CaCl2 + H2O