Magnesium hydroxide
Magnesium hydroxide (CAS: 1309-42-8), with the chemical formula Mg(OH)₂, is an inorganic compound with a molecular weight of 58.32 g/mol. This white, amorphous solid functions as a weak base. It finds primary use as an antacid and laxative in pharmaceutical preparations, and as a flame retardant and smoke suppressant in plastics and other materials. Its applications extend to wastewater treatment and the production of other magnesium compounds.
Antacid and Laxative
Magnesium hydroxide is widely utilized in pharmaceuticals as an active ingredient in antacids to neutralize stomach acid and as an osmotic laxative to relieve constipation.
Flame Retardant
As a flame retardant and smoke suppressant, it is incorporated into various polymers and plastics. Upon heating, it decomposes endothermically, releasing water vapor which cools the material and dilutes flammable gases.
Wastewater Treatment
It serves as an effective neutralizing agent for acidic wastewater streams, precipitating heavy metals as hydroxides and facilitating their removal.
Chemical Synthesis
Magnesium hydroxide acts as a base in various chemical synthesis processes, particularly in the production of other magnesium salts and compounds.
| Molecular weight | 58.32 |
|---|---|
| Linear formula | Mg(OH)2 |
| Assay | ≥95% |
| Solubility | 5 M HCl: soluble0.1 M, clear, yellow |
| Particle size | 5.8-20 nm (TEM)<50 nm (XRD) |
| Impurities tested | ≤0.01% Phosphorus (P)≤0.1% Insoluble matter |
| Melting point | 350 °C(lit.) |
Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | nwg |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26 |
| Cation traces | Al: ≤0.02%Ca: ≤0.7%Cu: ≤0.0005%Fe: ≤0.02%K: ≤0.005%NH4+: ≤0.05%Na: ≤0.05%Pb: ≤0.001%Zn: ≤0.001% |
| Anion traces | chloride (Cl-): ≤0.5% |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Surface Area | spec. surface area 94.8 m2/g |
|---|
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Magnesium Hydroxide used for?
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Magnesium hydroxide is used as an antacid, laxative, flame retardant, smoke suppressant, in wastewater treatment, and in chemical synthesis.
What is the CAS number and formula for Magnesium Hydroxide?
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The CAS number is 1309-42-8 and the chemical formula is Mg(OH)₂.
What grade and purity does Tech Serve Solutions supply for Magnesium Hydroxide?
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Tech Serve Solutions supplies Magnesium Hydroxide with an assay of ≥95%. This product is supplied for research and industrial use and is not represented as USP, BP, EP, or pharmacopoeia grade.
How should Magnesium Hydroxide be handled safely?
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Handle Magnesium Hydroxide with appropriate personal protective equipment, including a dust mask (type N95 recommended), eyeshields, and gloves. Avoid breathing dust. Ensure good ventilation. Refer to the Safety Data Sheet for comprehensive handling instructions. It may cause skin irritation, serious eye irritation, and respiratory irritation (H315-H319-H335).
Is Magnesium Hydroxide available for export?
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Yes, Tech Serve Solutions is a global supplier and exporter of fine chemicals, including Magnesium Hydroxide. Please contact us for export inquiries.
How can I request a quote or sample for Magnesium Hydroxide?
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To request a quote or sample, please use the 'Contact Us' form on our website or call our sales department, providing the product name and CAS number (1309-42-8).
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