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Magnesium chloride hexahydrate ball


Magnesium chloride, usually containing six molecules of water of crystallization, namely MgCl2?6H2O, is deliquescent. It has bitterness and is corrosive. Used in the production of magnesium metal, disinfectant, frozen brine, ceramics, and used to fill fabrics, paper and other aspects.

Basic Information

Chemical Category: Inorganic Salts - Chlorides

Chemical formula: MgCl2

Storage: sealed and stored in dry place

Relative molecular mass: relative molecules 95.2195.95.21

Magnesium chloride is a chloride, chemical formula MgCl2. Colorless and easy to deliquesce crystals. These salts are typical ionic halides and are readily soluble in water. Hydrated magnesium chloride can be extracted from salt water or sea water. Usually with 6 molecules of water of crystallization. However, the crystal water was lost when heated to 95 °C. Decomposition begins at 135 ° C or higher and releases hydrogen chloride (HCl) gas. Industrial raw materials for the production of magnesium. Found in sea water and salt brine. Hydrated magnesium chloride is a commonly used substance for prescription oral magnesium supplements.

Physical properties

Relative density: 1.56 (six water), 2.325 (anhydrous)

Melting point: 118 ° C (decomposition, Liushui), 712 ° C (anhydrous)

Boiling point: 1412 ° C (anhydrous)

Properties: hexahydrate: white tidal monoclinic crystal with bitter taste;

Anhydrous: colorless hexagonal crystal.

Solution: dissolve in water and ethanol.

Basic uses
1. It is an important inorganic raw material in the chemical industry for the production of magnesium products such as magnesium carbonate, magnesium hydroxide, magnesium oxide, etc., and also as a raw material for antifreeze.

2. Used in the metallurgical industry for the production of metallic magnesium (made by melt electrolysis), liquid chlorine and high purity magnesia.

3. In the building materials industry, it is the production of light building materials such as fiberglass tiles, decorative panels, sanitary ware, ceilings, floor tiles, magnesia cement, ventilation ducts, anti-theft manhole covers, fire doors and windows, fireproof panels, partition panels, production of artificial marble, etc. An important raw material for high-rise building supplies. In the magnesite products, high-quality magnesium tiles, high-quality fireproof panels, magnesium packaging boxes, magnesium decorative panels, lightweight wall panels, abrasive tools, stoves, fireworks and solid propellants can be used.

4. In other fields, it can be used as food additives, protein coagulants, snow melting agents, refrigerants, dustproofing agents, refractory materials, and the like. Tofu made with brine (magnesium chloride aqueous solution) is more tough than gypsum.

5. Metallurgical industry: a binder used to make refractory materials and furnace arm, and is a raw material for manufacturing No. 2 flux and smelting metal magnesium.

6. Machinery industry: In life, the use of diamond bitter soil can be made into mechanical packaging boxes, triangular cushions and furniture, etc., which is a good material for "materials by earth".

7. Transportation industry: used as a road ice melting agent, the ice speed is fast, the corrosion to the vehicle is small, and it is higher than the sodium chloride effect.

8. Medicine: "Malted dry" made of magnesium chloride can be used for medicinal purposes. Can be used as a laxative.

9. Agriculture: It can be used as magnesium fertilizer, potassium magnesium fertilizer and cotton defoliant.

10. Curing agent; nutritional fortifier; flavoring agent (combined with magnesium sulfate, salt, calcium hydrogen phosphate, calcium sulfate, etc.); solubilizer for Japanese sake, etc.; water removing agent (for fish cake, dosage 0.05%~ 0.1%); tissue improver (used in combination with polyphosphates as an elastic enhancer for surimi products). Due to the strong bitterness, the usual amount is less than 0.1%.

Storage Precautions
Anhydrous magnesium chloride and magnesium chloride containing different crystal waters are highly water-absorptive substances. They need to be insulated from air, moisture-proof, sealed and stored in a cool, dry and well-ventilated warehouse. Keep away from fire and heat. Protect from direct sunlight. It should be stored separately from oxidants, and should not be mixed. The storage area should be equipped with suitable materials to contain spills.


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