Description

Magnesium Hydroxide CAS NO 1309-42-8 is a versatile inorganic compound widely recognized for its flame-retardant and acid-neutralizing properties. This high-performance material is essential for manufacturers seeking to enhance product safety and environmental compliance. It serves as a critical raw material across diverse sectors, including polymer production, wastewater treatment, pharmaceuticals, and environmental remediation.

Application

• Flame Retardant & Smoke Suppressant: A key, halogen-free additive in polymers (e.g., PVC, polyolefins, EVA), cables, and construction materials, where it decomposes endothermically to release water vapor.
• Environmental & Wastewater Treatment: Used as an effective alkaline agent for pH adjustment and heavy metal precipitation in industrial effluent and flue gas desulfurization (FGD) processes.
• Pharmaceutical & Nutraceutical: Serves as an active ingredient in antacids and laxatives (e.g., Milk of Magnesia) and as a mineral source in dietary supplements.
• Food Industry: Employed as an anti-caking agent, color retention aid, and acidity regulator (food grade, FCC) in various food products.
• Agriculture: Functions as a magnesium fertilizer to correct soil magnesium deficiencies and as a buffering agent in pesticide formulations.
• Specialty Chemicals: A precursor for the synthesis of magnesium oxide and other magnesium salts, and used in the manufacture of refractory materials.

Basic Information

Product Name	Magnesium Hydroxide
CAS No.	1309-42-8
Molecular Formula	Mg(OH)2
Molecular Weight	58.32 g/mol
Synonyms	Magnesium dihydroxide; Milk of magnesia; Magnesia magma; Brucite; Magnesium hydrate; MAGNISAL®; FR-20; E528
EINECS	215-170-3

Quality Control

We supply Magnesium Hydroxide in various grades, including industrial, food (FCC), and pharmaceutical (USP/EP) specifications. Our products undergo rigorous quality testing to ensure compliance with industry standards. Certificates of Analysis (COA) are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent caking and absorption of atmospheric moisture and carbon dioxide.

Specification

Item	Specification
Appearance	White fine powder
Identification (IR)	Conforms
Assay (as Mg(OH)2)	≥ 95.0% - 99.0%
Loss on Drying	≤ 2.0%
Acid Insoluble Substances	≤ 0.1%
Calcium Oxide (CaO)	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm
Particle Size (D50)	1 - 10 µm (customizable)

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.