Magnesium Hydroxide 99%


Magnesium Hydroxide 99% is a versatile chemical compound widely used in various industries. With the chemical formula Mg(OH)2, it appears as a white powder and does not dissolve easily in water.

In manufacturing, magnesium hydroxide finds application as a flame retardant, providing fire resistance to plastic and rubber products. Its ability to release water vapor when exposed to heat helps inhibit the spread of flames.

In wastewater treatment processes, magnesium hydroxide acts as a flocculant, aiding in the removal of impurities and neutralizing acidity. This contributes to the purification of water and supports environmental sustainability.

Furthermore, magnesium hydroxide is an essential ingredient in the production of other magnesium compounds. These compounds have diverse industrial uses, including applications in agriculture, ceramics, and construction.

  • Flame retardant in the manufacturing of plastics and rubber products
  • Flocculant in wastewater treatment processes
  • Key ingredient in the production of other magnesium compounds
  • Industrial applications in agriculture, ceramics, and construction

Minimum Assay: 99%
Molecular Formula: Mg(OH)2
Molecular Weight: 58.32 g/mol

Chemical Analysis 

% by weight

MgO: 99.9
CaO: 0.01
SiO²: 0.02
Fe²O³: 0.001

Residue on a 53 μm sieve (ISO 787-7) 0.1%

Loss on ignition (950oC) 31%

Cas Number: 1309-42-8

Einecs Number: 215-170-3

HS Code / Commodity Code: 2816100000

Hazard Phrases: H0001

HS CODE: 2816100000


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The Duty is ascertained by your national customs authority based on the HS Code of each product. The HS Code is shown in the “European Shipment” section of each product page.


Additional information

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100gm, 250gm, 500gm, 1Kg, 2.5Kg, 5Kg, 25Kg