colorless cubic crystal. white or white porous or grain, honeycomb. oderless, slightly bitter taste. Relative density of 2.15(25℃). melting point of 782℃, boiling point of 1600℃. strong moisture absorption. It is easy to deliquescent in the air. Easy to soluble in water and at the same time release lots of heat. It's water solution is slight acidity. soluble with alcohol, acetone and vinegar. React with ammonia and alcohol to produce CaCl2·8NH3 & CaCl2·4C2H5OH. Under the common temperature, crystal to produce Hexahydrate. add heat to 30℃ and it is soluble with self crystal water. Continously add heat, lose water, to 200℃ become dihydrate. Add heat to 
260℃ it becomes water porous calcium chlorde,anhydrous.