Description
What is dichloride hexahydrate CAS 7791-18-6
dichloride hexahydrate CAS 7791-18-6 is a colorless crystal with the appearance of white flakes, granules or powder. Magnesium chloride hexahydrate is also widely used in metallurgical industry, chemical industry, building materials, food, transportation, medicine and agriculture.
Chemical Properties
| Property | Value |
| Chemical Formula | MgCl₂·6H₂O |
| Molecular Weight | 203.30 g/mol |
| Appearance | Colorless to white crystalline solid or granular crystals |
| Odor | Odorless |
| Density | 1.57 g/cm³ (25°C) |
| Melting Point | 116–118°C (decomposes with loss of water) |
| Boiling Point | Not applicable (decomposes upon heating) |
| Solubility | Highly soluble in water (167 g/L at 20°C); soluble in ethanol |
| Solution pH | ~5–7 (5% aqueous solution) |
| Crystal System | Monoclinic |
| Hygroscopicity | Highly hygroscopic, absorbs moisture from the air |
| Thermal Stability | Decomposes and loses crystal water when heated above ~117°C |
| Chemical Reactions | – Reacts with bases to form magnesium hydroxide |
| – Reacts with phosphates to form precipitates |
Application
- Industrial Uses:
- Used as a dehydrating and drying agent.
- In the production of fireproof materials, ceramics, and leather tanning.
- Construction Materials:
- A key component of magnesium oxychloride cement (commonly known as “Sorel cement”).
- Agriculture:
- Used as a magnesium source in fertilizers and animal feed supplements.
- Pharmaceuticals and Food:
- Used as a food additive (e.g., coagulant) and in the production of medicines.
- Water Treatment:
- Applied in industrial water treatment and seawater desalination processes.
Packing
25kgs/drum, 9tons/20’container
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