It is a pharma product, used in manufacture of antacid Tablets & liquids. Available in light and heavy variety to be used in tabs. & liquids respectively. Also used in talcum powder as prickly heat powder, antioxidant, decolouriser and odour absobant.

Description : Fine white powder, free from grittyness odourless, sligtly hygroscopic
Solubility : Practically insoluble in water and in ethanol 95 %
Alkalinity : Complies as I.P./B.P./U.S.P.
Arsenic : Not more than 4 ppm
Heavy Metals : Not more than 40 ppm
Chloride : Note more than 500 ppm
Sulphate : Not more than 0.5% ppm
Acid absorption : Not less than 100 ml. of 0.1m Hydrochloric acid required to neutralise 1.0 gm.
Water soluble salts : Not more than 30 mg per Gm.
Loss on Ignition : Not less than 17.0% & not more than 34.0%
Magnesium oxide : Not less than 29.0%
Silicone Dioxide : Not less than 65.0%