Catalog Number
ACMA00017004
Product Name
Magnesium Hydroxide
Description
Odourless, white bulky powder
IUPAC Name
magnesium;dihydroxide
Molecular Weight
58.32g/mol
Molecular Formula
Mg(OH)2;Mg(OH)2;H2MgO2
Canonical SMILES
[OH-].[OH-].[Mg+2]
InChI
InChI=1S/Mg.2H₂O/h;2*1H2/q+2;;/p-2
InChI Key
VTHJTEIRLNZDEV-UHFFFAOYSA-L
Melting Point
350 °C (decomp.);350 °C (decomposes)
Solubility
Practically insoluble in water and in ethanol;Soluble in dilute acids;0.0009 G SOL IN 100 CC WATER @ 18 °C; 0.004 G SOL IN 100 CC WATER @ 100 °C; SOL IN AMMONIUM SALTS;Almost insoluble in alcohol
Color/Form
Amorphous powder;White, hexagonal crystals;Granules
Covalently-Bonded Unit Count
3
MeSH Entry Terms
Brucite;Hydrate, Magnesium;Hydroxide, Magnesium;Magnesium Hydrate;Magnesium Hydroxide;Magnesium Hydroxide (Mg(OH)4)
Monoisotopic Mass
57.990521g/mol
Other Experimental
Imparts slight alkaline reaction to water; absorbs CO2 in the presence of water;Opaque, more or less viscous suspension from which water usually separates on standing; alkaline to litmus and phenolphthalein /Milk of Magnesia USP/;Decomposes on heating above 120 °C;Heat of formation: -924.54 kJ/mol; free energy of formation: -833.58 kJ/mol; heat capacity: 77.03 J/mol-K; Mohs' hardness = 2.5;Heat of Formation = -1096 kJ/mol;White, friable masses or bulky, white powder; at about 700 °C is converted to MgO; sol in about 3,300 parts CO2-free water; more sol in water containing CO2; sol in dilute acids with effervescence; insol in alcohol /Magnesium carbonate hydroxide/
Refractive Index
Index of refraction: 1.559, 1.580