Facts About Calcium Chloride

Calcium chloride is a white and crystalline powder.
••• Salt image by lefebvre_jonathan from Fotolia.com

Calcium chloride (CaCl2) is a calcium salt of hydrochloric acid. It is a deliquescent salt, meaning it can liquefy by absorbing moisture in the air. It is used to maintain calcium levels in water, as a drying agent to melt ice, can be used to strengthen concrete and is used in fire extinguishers.


Calcium breaks down easily in water, forming calcium and chloride ions. Calcium promotes plant growth, and chloride is an important micronutrient for plants and plays a role in photosynthesis.

Drying Agent

Calcium chloride is used on sidewalks, roads and in parking lots as a deicing agent. It does this by lowering the melting point of water so ice does not form.


Calcium chloride is used as an accelerant in concrete. An accelerant typically increases strength, reaction or means the concrete settles in faster.

Fire Extinguishers

Calcium chloride has been used as an additive in fire extinguishers. After expiring, stainless steel extinguishers with calcium chloride should not be tested or replaced but destroyed.


Although calcium chloride is not flammable, toxic and does not burn, it can produce hydrogen atoms if it reacts with zinc and sodium. It is also corrosive to metals such as brass and steel. Calcium chloride pellets should not be ingested.

Related Articles

What Materials Will Make an Ice Cube Melt Faster?
Properties of Magnesium Chloride
Calcium Chloride Alternatives
Commercial Uses of Sodium Polyacrylate
How to Make Magnesium Chloride
How to Make a Sodium Silicate Solution
What Materials Will Make an Ice Cube Melt Faster?
What is Ethanolic Potassium Hydroxide?
How to Make Bromine Water in the Chemistry Lab
The Properties of Rock Salt
Uses of Potassium Hydroxide
Uses for Gypsum Powder
Uses for Potassium Perchlorate
Alodine Vs. Anodizing
The Properties of Nitrocellulose
Signs of a Chemical Reaction With Steel Wool and Peroxide
How to Use Sodium Perborate
Difference Between 316 & 308 Stainless Steel
How to Regenerate Activated Charcoal
How to Make Calcium Carbide

Dont Go!

We Have More Great Sciencing Articles!