CASO is characterised by a certain number of remarkable properties which determine its many applications.

• Low freezing point with water : In conjunction with water, CASO forms a solution that will not freeze until it reaches a temperature of -51.6°C

• Exothermic dissolution : When it dissolves in water, CASO gives off heat (90 kcal/kg of 77-80% crystalline CaCl2).

• High hygroscopicity : CASO absorbs humidity from the atmosphere even during very dry weather.

• Deliquescence: CASO dissolves in absorbed water.

• High specific gravity : A solution of 40% CaCl2 produces a specific gravity of 1.4kg/drn³ at 15°C.

• Water combines with CASO in the forms of CaCl2 x H2O with x = 1,2,4,6.