Introduction Calcium chloride is an inorganic salt, which exists as solid or liquid. Solid calcium chloride is a white, crystal substance in the form of flake, granule, pellet or powder. With different crystal water content, it can be dihydrate or anhydrous. Liquid calcium chloride is a colorless, clear solution. As calcium chloride has such properties as quick dissolving, exothermic ability, attracting moisture from the air and surroundings, dissolving at very low temperature. Application: 1.Petroleum: oil field drilling, stabilizing mud layer, lubricating drilling, drilling and cementing. 2.2.Water treatment : Calcium ions can precipitate most anions.Chloride ions precipitate cations,and can also oxidize ions to purify wastewater. 3.Cryogen : Calcium Chloride solution is an important refrigerant for refrigerators and ice making. 4.Used for snow melting and deicing on roads, highways, parking lots and ports. 5.As fog removing agent and dust collecting agent on road, pot 6.As a dryer to dry nitrogen, oxygen, hydrogen, hydrogen chloride and sulfur dioxide etc. 7.As dehydration agent when producing alcohol, ester, ether and acrylic acid. 8.It can increase hardness of concrete and increase cold resistance ability