Magnesium Hydroxide (Mg(OH)2) Nanoparticles - Properties, Applications

Topics Covered

Introduction
Chemical Properties
Physical Properties
Thermal Properties
Applications

Introduction

Nanoparticles are used, or being evaluated for use, in many domains such as biology, physics, chemistry, cosmetics, optical components, polymer science, pharmaceutical drug manufacture, toxicology, and mechanical engineering.

This article discusses the properties and applications of magnesium hydroxide nanoparticles. Magnesium is a Block S, Period 3 element, hydrogen is a Block S, Period 1 element, and oxygen is a Block P, Period 2 element. Magnesium can be commercially produced from carnallite, dolomite, brucite, magnesite, olivine and talc.

Magnesium hydroxide nanoparticles appear in a white powder form, and have a low toxicitym making them attractive for use in applications where environmental exposure may be an issue. Pure magnesium hydroxide nanopowder, like many fine powders, is graded as an irritant and can cause some skin, eyes, and breathing irritations.

Chemical Properties

The chemical properties of magnesium hydroxide nanoparticles are outlined in the following table.

Chemical Data
Chemical symbol Mg(OH)2
CAS No. 1309-42-8
Group Magnesium 2
Hydrogen 1
Oxygen 16
Electronic configuration Magnesium [Ne] 3s2
Hydrogen 1s1
Oxygen [He] 2s2 2p4
Chemical Composition
Element Content (%)
Magnesium  
Hydrogen  
Oxygen  

Physical Properties

The physical properties of magnesium hydroxide nanoparticles are given in the following table.

Properties Metric Imperial
Density 2.34 g/cm3 0.084 lb/in3
Molar mass 58.83 g/mol -

Thermal Properties

The thermal properties of magnesium hydroxide nanoparticles are provided in the table below.

Properties Metric Imperial
Melting point 350°C 662°F

Applications

The key applications of magnesium hydroxide nanoparticles are as follows:

  • As a flame retardant in various polymer compositions
  • As a precursor for magnesium oxide refractory ceramics
  • Can be evenly dispersed in PA, PP, ABS, PVC, and other rubber and plastic products
  • As smoke suppressants
  • As a non-hazardous alkali to neutralize acidic wastewaters.
  • In the biorock method for building artificial reefs

Source: AZoNano

Date Added: Apr 11, 2013 | Updated: Jul 22, 2013
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