Wed March 26, 2014 By: Sanskrati Gawande

what is the effect of heat on magnesium chloride hexa hydrate and gypsum

Expert Reply
Thu March 27, 2014

Magnesium chloride hexahydrate (MgCl2•6H2O), which has a boiling point of 100°C at 760 mmHg (Predicted).

Magnesium Chloride Hexahydrate is not combustible, and does not contribute to the intensity of a fire; however, water should be used to fight fire involving this material in flooding quantities, as reaction with water can produce sufficient heat to ignite other combustible materials. Closed containers exposed to heat may explode.

On heating gypsum at, it loses water molecules and becomes calcium sulphate hemihydrate ( CaSO4. 1/2 H2O). This is called Plaster of Paris. 

Mon April 17, 2017


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