Title: Magnesium Hydroxide
CAS Registry Number: 1309-42-8
Additional Names: Magnesium hydrate
Trademarks: Carmilax (Pfizer); Emgesan (Kabi); Marinco H
Molecular Formula: H2MgO2
Molecular Weight: 58.32
Percent Composition: H 3.46%, Mg 41.68%, O 54.87%
Line Formula: Mg(OH)2
Literature References: Occurs in nature as the mineral brucite. Prepn from magnesium chloride or sulfate and NaOH: Perlard, Waldron, US 3127241 (1964 to Dow). Industrial method for producing magnesium hydroxide having variable particle sizes: Chisholm, US 3232708 (1966 to FMC).
Properties: Amorphous powder. Practically insol in water (1:80,000). Sol in dil acids. Imparts slight alkaline reaction to water. pH of aq slurry: 9.5-10.5. Absorbs CO2 in the presence of water. Keep well closed.
Therap-Cat: Antacid; cathartic.
Keywords: Antacid; Laxative/Cathartic.