Magnesium Hydroxide 99%

What is Magnesium Hydroxide? Our Magnesium Hydroxide 99%, with the chemical formula Mg(OH)₂, is a high-purity inorganic compound commonly used in pharmaceutical, industrial, and environmental applications. It is also known by alternate names such as Milk of Magnesia, Magnesia Hydroxide, and Magnesium (II) Hydroxide. This white, odourless powder is valued for its versatility, including its use as an antacid, laxative, and in water treatment processes.

Consistent Quality: We use only carefully sourced Magnesium Hydroxide 99%, ensuring reliable and consistent performance for a wide range of applications in the pharmaceutical, industrial, and environmental sectors.

Shipped from Manchester, UK Facility: Sourced and packaged in non-toxic, chemical-resistant containers, ensuring safe handling and consistent quality for our customers.

Frequent Uses

Environmental Applications
Magnesium Hydroxide plays an important role in environmental applications, particularly in the treatment of acidic industrial effluents. It is used to neutralise acidic waste streams and to prevent environmental pollution. 

Industrial Manufacturing
Utilised in the manufacture of flame retardants, particularly for polymers and plastics. Its high thermal stability makes it an effective additive in materials that require resistance to fire. 

• 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

Technical grade

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