湖北博枫化工有限公司
Hubei Bofeng Chemical Co., Ltd.

Calcium chloride
Alias: Anhydrous calcium chloride; anhydrouscalciumchloride; calciumchloraide; calciumchloride(anhydrous); Calcium chloride anhydrous
CAS: 22691-02-7
Molecular formula: CaCl₂.xH₂O

Calcium chloride
Alias: Anhydrous calcium chloride; anhydrouscalciumchloride; calciumchloraide; calciumchloride(anhydrous); Calcium chloride anhydrous
CAS: 10043-52-4
Molecular formula: CaCl₂

Calcium chloride dihydrate
Alias: snow melt agent; calcium chloride hydrate (1:2:2); calcium dichloride
CAS: 10035-04-8
Molecular formula: CaCl₂H₄O₂

Chemical formula: CaCl₂
Molecular weight: 111
CAS: 10043-52-4
EINECS: 233-140-8
Melting point: 772 ℃   Boiling point: 1600 ℃
Water solubility: Soluble in water and exothermic when dissolved
Density: 2.15 g/cm³
Appearance: white granules or powder
Safety description: S26; S39; S24; S22; S36
Hazard symbol: R36
Hazard description: Xi
UN Dangerous Goods Number: 1789

Properties:
Colorless cubic crystal, white or off-white, granular, honeycomb, spheroid, irregular granular, powder.
Slightly toxic, odorless, slightly bitter taste. Extremely hygroscopic, easy to deliquescence when exposed to air. It is easily soluble in water, and its solubility is 74.5g /100g water at 20℃. Its aqueous solution is slightly acidic.
Soluble in a variety of polar and protic solvents. Solubility in the following solvents (g/100mL of solvent) at 20℃ : methanol: 29.2, anhydrous ethanol: 25.8, n-propanol: 15.8, n-butanol: 25.0, n-pentanol: 11.5, ethylene glycol: 21.6 (25℃), formic acid: 43.1, acetic acid: 15.0 (30℃), hydrazine: 16.0.
However, in dipole solvents and low polar solvents, such as diethyl ether, tetrahydrofuran, etc., only slightly soluble or insoluble. CaCl2·8NH3 and CaCl2·4C2H5OH complexes were formed by reaction with ammonia or ethanol, respectively.
At low temperature, the solution crystallizes and precipitates as hexahydrate, which gradually dissolves in its own crystalline water when heated to 30℃, gradually loses water when heated to 200℃, and then becomes dihydrate when heated to 260℃, and then becomes white porous anhydrous calcium chloride.
In the process of heating and dehydration of calcium chloride hydrate, part of hydrolysis reaction occurs, so the product often contains a small amount of CaO impurities.