Magnesium Hydroxide mixture


IngredientsQty GivenQty TakenActivity
Magnesium Sulphate100gFormation of Magnesium Hydroxide
Sodium Hydroxide15g
Light Magnesium oxide52.5g
Peppermint Oil0.5mlFlavouring Agent
Purified water freshly boiled   and cooledq.s to 1000 mlVehicle


Sodium hydroxide was dissolved in purified water.

Light magnesium oxide was triturated with this solution to form a smooth cream.

Pour this suspension in a thin stream into a solution of the magnesium sulfate in purified water, stirring continuously during the mixing. 

Mixture is set aside in a closed container for 48 hrs.

Allow the precipitate to subside, remove the clear liquid, and wash the precipitate with purified water until the washings give only a slight reaction for sulfate.

Mix the washed precipitate with purified water, and add sufficient purified water to produce the required volume.


MgO +H2O                Mg (OH)2                   

This is a  Hydration reaction which is very slow

Mg SO4 +2 NaOH                 Mg (OH)2       +  Na2SO        

Precipitation reaction by double decomposition 

All sulphate ions ( Na2SO4) must be removed as they enhance peristalsis of intestine.   



Laxative (8-16 ml) and antacid (1-4 ml)

Container & storage:

Well closed container in   a cool place

Labeling Direction:

Shake well before use

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