magnesium hydroxide CAS Number: 1309-42-8
Pharmaceutical Materials 2025-03-02
CAS Number: 1309-42-8
Molecular Formula: Mg(OH)2
Molecular Weight: 58.32
Appearance: White powder or crystal
Melting Point: 350°C (decomposes)
Solubility: Insoluble in water and alcohol, soluble in dilute acids and ammonium salt solutions.
Usage: Used as a flame retardant, antacid, and neutralizing agent.
Magnesium hydroxide, with the CAS number 1309-42-8, is an inorganic compound known for its versatile applications. It exists as a white, odorless powder with a hexagonal crystal structure. This compound is widely used as a flame retardant in plastics and rubbers, and it also serves as a desulfurization agent in environmental protection, replacing caustic soda and lime in acid wastewater neutralization. Additionally, magnesium hydroxide finds applications in the pharmaceutical industry, sugar refining, and as a raw material for other magnesium salts.
| Property | Value |
|---|---|
| Physical Properties | |
| CAS Number | 1309-42-8 |
| Molecular Formula | Mg(OH)₂ or H₂MgO₂ |
| Molecular Weight | 58.32 g/mol |
| Density | 2.36 g/cm³ |
| Appearance | White powder |
| Chemical Properties | |
| Solubility in Water | 0.0009 g/100 g (at 18°C) |
| pH (1 mM solution) | 10.4 |
| Melting Point | 350°C |
| Decomposition | Forms magnesium oxide and water at 350°C |
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