Magnesium hydroxide


Item Index Index Index
A.R. C.P. High-purity grade
Assay % 98~102 98~102 ≥ 98.5
HclInsol. in water % ≤0.03 ≤0.1 ≤0.1
Loss on ignition % 30~33 30~33 30~33
Chlorides(CL) % ≤0.02 ≤0.05 ≤0.2
Nitrates(NO3)% ≤0.005 ≤0.01 ≤0.005
Sulphates(SO4)% ≤0.02 ≤0.2 ≤0.05
K% ≤0.005 ≤0.05 ≤0.05
Na% ≤0.05 ≤0.2 ≤0.2
Ca% ≤0.05 —— ≤0.05
Fe% ≤0.002 ≤0.01 ≤0.02
Heav metal(Pb)% ≤0.005 —— ≤0.005


Packing& Storage

Packing 25kg cardboard drum, lined with double-layer plastic bag
Storage 20℃, 2 years.
Shipping Room temperature in China; may vary elsewhere


General Information

1.1 Chemical & Physical Properties

Common Names  Magnesium hydroxide
CAS No. 1309-42-8 Boiling Point (℃) 100ºC at 760mmHg
Molecular Weight 58.32 Melting Point (℃) 350ºC ( Decomposes)
Appearance Colorless crystal, belonging to the hexagonal crystal system Vapor Specific Gravity 2.36
HS Code 2816100090 Flash Point (℃) will not burn
Solubility Soluble in dilute acid and ammonium salt solution, almost insoluble in water and alcohol Autoignition Temperature (℃) N/A


1.2 Safety Information

Safety Phrases 26-36-37/39
RIDADR NONH for all modes of transport
WGK Germany N/A
Packaging Group N/A
Hazard Class N/A


Inhalation Cough. Sore throat. Use local exhaust or breathing protection. Fresh air, rest.
Skin Redness. Burning sensation. Itching. Protective gloves. Remove contaminated clothes. Rinse and then wash skin with water and soap.
Eyes Redness. Pain. Wear safety goggles. First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.
Ingestion Abdominal pain. Nausea. Vomiting. Do not eat, drink, or smoke during work. Wash hands before eating. Rinse mouth. Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Refer for medical attention .


1.3 Synthetic Route


Magnesium hydroxide, also known as brucite, is a white crystalline solid with the chemical formula Mg(OH)2. It is widely used in various industries due to its unique properties and versatile applications. In this product introduction, we will explore the production capacity, upstream and downstream development, as well as the product outlook and applications of magnesium hydroxide in China and internationally.


Production Capacity:

The production capacity of magnesium hydroxide has been steadily increasing in recent years to meet the growing demand. Major magnesium hydroxide producers have expanded their production facilities, enhancing the overall capacity. Additionally, advancements in production techniques have improved efficiency, resulting in higher output. The increased production capacity ensures a stable supply of magnesium hydroxide for various industries.

Upstream and Downstream Development: In terms of upstream development, magnesium hydroxide primarily relies on magnesium-rich minerals as its raw materials. The mining and extraction of magnesium minerals play a crucial role in the production of magnesium hydroxide. Efforts have been made to explore new sources of magnesium-rich minerals to ensure a sustainable supply chain.

Regarding downstream development, magnesium hydroxide has found extensive applications across several industries. Its versatility and unique properties have made it an essential ingredient in various manufacturing processes. The development of innovative downstream applications continues to drive the demand for magnesium hydroxide and open new opportunities for the industry.

Product Outlook and Prospects: The global market for magnesium hydroxide is expected to witness significant growth in the coming years. Increasing environmental regulations and a shift towards eco-friendly products have boosted the demand for magnesium hydroxide, as it serves as an excellent flame retardant and smoke suppressant. Its applications in industries such as plastics, rubber, and construction are anticipated to contribute to the market’s expansion.

In China, as a major producer and consumer of magnesium hydroxide, the market is projected to grow steadily. The country’s growing manufacturing sector, coupled with the rising demand for environmentally friendly products, drives the usage of magnesium hydroxide in various applications. Furthermore, ongoing research and development efforts aim to explore new uses and enhance the overall performance of magnesium hydroxide, further fueling its market growth in China.


Applications of Magnesium Hydroxide:

Flame Retardant: Magnesium hydroxide acts as an efficient flame retardant in various industries. It releases water vapor when exposed to high temperatures, effectively reducing the spread of flames and minimizing smoke generation. It finds applications in plastics, textiles, and electrical cables.
Environmental Protection: Magnesium hydroxide is widely used in wastewater treatment processes. It neutralizes acidic effluents, reduces heavy metal concentrations, and acts as a pH regulator in water treatment plants. Its alkaline nature makes it an environmentally friendly choice for neutralizing acidic pollutants.
Pharmaceuticals: Magnesium hydroxide is utilized in the pharmaceutical industry as an antacid and laxative. It helps relieve indigestion, heartburn, and constipation. Additionally, it finds applications in oral care products as an ingredient in antacids and toothpaste formulations.
Agriculture: Magnesium hydroxide is employed in agriculture as a source of magnesium and as a soil conditioner. It improves the nutrient content of the soil and helps regulate pH levels, ensuring optimal conditions for plant growth.



Magnesium hydroxide is a versatile compound with a wide range of applications across industries. Its flame retardant properties, environmental benefits, and pharmaceutical uses make it an indispensable component in various products and processes. With the growing demand for eco-friendly solutions and ongoing research and development efforts, the future of magnesium hydroxide looks promising both in China and internationally.