CAS 1309-42-8 Magnesium Hydroxide - Materials / Alfa Chemistry

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Magnesium Hydroxide

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Catalog Number

ACM1309428-1

CAS Number

1309-42-8

Product Name

Magnesium Hydroxide

Category

Nanoparticles; Polymers

Description

Odourless, white bulky powder

IUPAC Name

magnesium;dihydroxide

Molecular Weight

58.32g/mol

Molecular Formula

Mg(OH)2

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)

Purity

> 99.99%

Density

2.36 g/mL

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

Application

Magnesium hydroxide, commonly recognized as a key component in the 'milk of magnesia,' serves a dual purpose as both an antacid and a laxative. This white, bulky powder, formed through the reaction of sodium hydroxide with a soluble magnesium salt, appears as a milk-like suspension due to its limited solubility in water. As a mild base, it effectively neutralizes excess stomach acid, providing relief from indigestion and heartburn. Additionally, the magnesium ions present enhance water content in the intestines, promoting bowel movements through osmotic effects. This dual action makes magnesium hydroxide an essential remedy for digestive discomfort.

Average Particle Size

80 nm

Color/Form

Amorphous powder;White, hexagonal crystals;Granules

Complexity

Covalently-Bonded Unit Count

EC Number

215-170-3

Exact Mass

57.990521g/mol

Form

Nanopowder

Formal Charge

Heavy Atom Count

MeSH Entry Terms

Brucite;Hydrate, Magnesium;Hydroxide, Magnesium;Magnesium Hydrate;Magnesium Hydroxide;Magnesium Hydroxide (Mg(OH)4)

Monoisotopic Mass

57.990521g/mol

Odor

Odorless

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

Rotatable Bond Count

UNII

NBZ3QY004S

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