Magnesium Hydroxide ACS

Product Overview

Magnesium Hydroxide ACS is a high-purity, white, odorless powder with the chemical formula Mg(OH)₂. Classified as an ACS Reagent Grade material, it meets stringent purity standards required for analytical, research, and industrial manufacturing applications. Unlike technical grades, this product maintains a strictly controlled impurity profile, making it the preferred choice for sensitive formulations and chemical synthesis.

Primarily utilized as a strong yet safe alkaline agent, Magnesium Hydroxide is effective for acid neutralization and pH adjustment in water treatment and industrial processing. Its low solubility in water allows for a controlled release of hydroxide ions, providing long-lasting buffering capacity without the risk of pH spikes associated with stronger caustics. Additionally, it serves as a critical precursor in the production of magnesium salts and as a halogen-free flame retardant additive in polymer matrices.

Key Properties

• Chemical Formula: Mg(OH)₂
• Grade: ACS Reagent
• CAS Number: 1309-42-8
• Molecular Weight: 58.32 g/mol
• Appearance: White amorphous powder
• Solubility: Practically insoluble in water; soluble in dilute acids
• Assay: ≥ 95.0%
• Calcium (Ca): ≤ 1.0%
• Heavy Metals (as Pb): ≤ 0.005%
• Iron (Fe): ≤ 0.02%
• Chloride (Cl): ≤ 0.01%

Common Applications

• Water Treatment: Used effectively for pH adjustment and acid neutralization in wastewater streams. It precipitates heavy metals efficiently and produces a denser sludge than lime or caustic soda.
• Chemical Synthesis: Acts as a raw material precursor for producing magnesium oxide, magnesium salts, and other magnesium compounds.
• Flame Retardant: Functions as a halogen-free flame retardant and smoke suppressant in plastics, rubber, and roofing materials. It decomposes endothermically at 330°C to release water.
• Flue Gas Desulfurization: Utilized in scrubbing systems to remove sulfur dioxide (SO2) from industrial exhaust gases.
• Laboratory Reagent: Serves as a reliable alkaline standard for analytical chemistry and research projects requiring ACS-grade purity.

Safety Precautions

Magnesium Hydroxide should be handled with standard industrial hygiene practices. Store in a cool, dry area away from incompatible materials such as strong acids. Ensure containers are tightly closed to prevent moisture absorption and caking. While generally considered low hazard, the powder can cause mechanical irritation to eyes and the respiratory tract. Operators should wear appropriate Personal Protective Equipment (PPE), including safety glasses, gloves, and a dust mask (N95) when handling large quantities to minimize dust inhalation. Refer to the Safety Data Sheet (SDS) for comprehensive handling instructions.

Benefits

High Purity ACS Grade – Validated for research and critical manufacturing processes requiring low trace impurities.
Controlled pH Management – Provides safe, buffered neutralization without the safety risks of liquid caustics.
Versatile Utility – Suitable for water treatment, flame retardancy, and chemical synthesis.
Scalable Packaging – Available in sizes ranging from laboratory bottles to bulk industrial pails.

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