Magnesium Chloride Hexahydrate PURE [ CAS: 7791-18-6 ] - 100g

Magnesium Chloride Hexahydrate – Pure

Other Names: Magnesium dichloride hexahydrate, MgCl₂·6H₂O
Chemical Formula: MgCl₂·6H₂O
Molar Mass: 203.30 g/mol
CAS Number: 7791-18-6
Appearance: Colorless to white crystalline solid
Odor: Odorless

Magnesium chloride hexahydrate is an inorganic salt consisting of magnesium and chloride ions with six molecules of water of crystallization. It is widely used in various chemical, industrial, and laboratory applications, particularly for its hygroscopic and ionic conductivity properties.

Chemical and Physical Properties

• Density: ~1.57 g/cm³ (at 20 °C)

• Melting Point: ~115–117 °C (with decomposition and dehydration)

• Boiling Point: Decomposes before boiling

• Solubility in Water: Highly soluble (~1670 g/L at 20 °C)

• Solubility in Alcohols: Slightly soluble

• pH (5% solution): ~5.0–6.5

• Hygroscopic: Yes – absorbs moisture from air

Applications

• Chemical Industry: Used as a source of magnesium ions in synthesis and as a drying agent in non-aqueous systems.

• Dust and Ice Control: Commonly used in de-icing formulations and dust suppression due to its hygroscopic nature.

• Textiles and Dyeing: Acts as a mordant and stabilizer in specific dyeing processes.

• Laboratory Use: Serves as a magnesium source or catalyst component in various analytical and preparative procedures.

Safety

Handling and Storage

• Handling: Avoid contact with eyes and prolonged skin exposure. Use in well-ventilated areas and wear appropriate PPE.

• Storage: Store in a tightly sealed container in a cool, dry, well-ventilated place. Protect from moisture to prevent caking and deliquescence.

Environmental Considerations

Magnesium chloride is generally considered to have low environmental toxicity in moderate concentrations. However, avoid uncontrolled release into water systems in large quantities.