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    Related: Nutrient Salt Magnesium Chloride
    • Magnesium Chloride Hexahydrate CAS 7791-18-6

    Magnesium Chloride Hexahydrate CAS 7791-18-6

    Magnesium Chloride Hexahydrate (CAS 7791-18-6) is a highly soluble hydrated inorganic salt utilized as a premium de-icing agent and a coagulant in food processing. Chemically identified as Magnesium dichloride hexahydrate, this colorless or white crystalline flake functions to suppress dust on unpaved roads and coagulate soy milk into tofu. As a stable Magnesium(II) chloride hydrate, it is extensively utilized in the production of Sorel cement (magnesia cement) and fireproofing boards due to its ability to form strong chemical bonds with magnesium oxide. We ensure bulk supply capabilities for this material, providing access to competitive factory pricing and customized specifications to meet specific concentration requirements (e.g., 46% - 47% flakes). Full technical documentation, including MSDS, TDS, COA, is available to support compliance and safety protocols.

    • CAS: 7791-18-6
    • Synonyms: Magnesium dichloride hexahydrate, Magnesium chloride 6H2O, Hydrated magnesium chloride, Bischofite (refined)
    • Einecs: 232-094-6
    • Molecular Formula: MgCl2·6H2O
    • Grade: Industrial Grade / Tech Grade
    • Package: 25kg PP/PE bag, 50kg bag, or 1000kg Jumbo bag (Customization available)
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    Product Description

    Magnesium Chloride Hexahydrate is a white or colorless crystalline solid, typically supplied in the form of flakes, pellets, or granules. It is highly hygroscopic and extremely soluble in water. Derived from natural brine or sea water processing, our Magnesium Chloride is a crucial raw material in various industries, ranging from construction materials (Sorel cement) to winter road maintenance.

    Our manufacturing process ensures strict quality control, minimizing the content of sulfates and alkali metals to provide a consistent and reliable raw material for your production needs.

    1 Physicochemical Properties
    2 Applications
    3 Storage Conditions
    4 Safety Precautions

    Physicochemical Properties

    The following specifications represent our typical industrial-grade export standard:

    PropertySpecification / Value
    AppearanceWhite to Light Yellow Flakes or Crystals
    Main Content (MgCl2)≥ 46.0%
    Magnesium Chloride Hexahydrate (MgCl2·6H2O)≥ 98.0%
    Calcium (Ca2+)≤ 0.25%
    Sulfate (SO4 2-)≤ 0.40%
    Alkali Metal Chlorides (K+ & Na+)≤ 0.80%
    Water Insolubles≤ 0.10%
    DensityApprox. 1.56 g/cm³
    Melting Point~117°C (Decomposes)
    pH Value (in water solution)6.0 – 8.0
    SolubilityEasily soluble in water and ethanol

    Applications

    Magnesium Chloride Hexahydrate is a versatile chemical used in numerous sectors:

    1. De-icing and Snow Removal: Highly effective for melting ice on roads and sidewalks at low temperatures, working faster than sodium chloride.
    2. Dust Control: Used on unpaved roads and mining sites to suppress dust and stabilize soil due to its hygroscopic nature.
    3. Construction Materials: A key ingredient in the production of Magnesium Oxychloride Cement (Sorel Cement), used for industrial flooring, fireproof boards, and wall panels.
    4. Textile & Paper Industry: Acts as a dressing agent and helps in fireproofing fabrics.
    5. Water Treatment: Used as a coagulant in wastewater treatment processes.
    6. Fire Extinguishing Agents: Used in the production of fire retardants.
    7. Agriculture: Used as a magnesium supplement in fertilizers.

    For the anhydrous magnesium chloride grade, see Magnesium Chloride.

    Storage Conditions

    • Moisture Sensitivity: The product is highly hygroscopic (absorbs moisture from the air). It must be stored in a dry, cool, and well-ventilated area.
    • Packaging: Keep containers tightly closed when not in use. Do not store in open bags.
    • Protection: Protect from direct sunlight and rain during transportation and storage.
    • Compatibility: Store away from strong oxidizing agents and metals.

    Safety Precautions

    • Handling: Avoid direct contact with skin and eyes. Wear appropriate personal protective equipment (PPE), including safety glasses, gloves, and a dust mask if handling powder.
    • Inhalation: Avoid breathing dust. Use in a well-ventilated area.
    • First Aid:
      • Eye Contact: Rinse immediately with plenty of water for at least 15 minutes.
      • Skin Contact: Wash off with soap and plenty of water.
      • Ingestion: Rinse mouth with water. Do not induce vomiting without medical advice.
    • Ecological Info: Avoid releasing large quantities into natural water bodies as it may alter salinity levels.

    FAQ - Technical & Supply Chain

    • Q:

      What is Magnesium Chloride Hexahydrate CAS 7791-18-6?

      A: Magnesium Chloride Hexahydrate CAS 7791-18-6 is the hydrated magnesium chloride crystal containing six water molecules, with the formula MgCl2.6H2O and molecular weight about 203.30 g/mol. It is usually supplied as white to light-yellow flakes, pellets, or granules.
    • Q:

      How does hexahydrate differ from anhydrous Magnesium Chloride?

      A: The hexahydrate contains six molecules of water of crystallization, while anhydrous magnesium chloride is the water-free form. Hexahydrate is strongly hygroscopic and is often used for moisture-related, de-icing, and dust-control applications; assay and handling behavior differ from the anhydrous product.
    • Q:

      Why is Magnesium Chloride Hexahydrate used for dust control and de-icing?

      A: Its hygroscopic nature lets it absorb moisture from air and bind fine particles, reducing dust on unpaved roads and mining sites. It also lowers the freezing point of water, making it useful for winter road treatment and ice control.
    • Q:

      What role does it play in Sorel cement?

      A: Sorel cement, also called magnesium oxychloride cement, is formed by reacting magnesium chloride solution with magnesium oxide. This gives a strong, quick-setting binder used in industrial flooring, fireproof boards, and composite construction materials.
    • Q:

      What other industrial uses and key specifications apply?

      A: It is also used in agriculture, wastewater treatment, textiles, paper, fireproofing, and artificial seawater. Industrial-grade material is commonly specified by magnesium chloride content, calcium, sulfate, alkali chlorides, water insolubles, and pH.

    Ordering & Documentation

    Key information for document requests, quotations, and supply planning.

    Documents

    COA, TDS, SDS/MSDS and packing details are available on request.

    Quotation

    Send the CAS number, grade, quantity, packing preference and destination.

    Sample & Supply

    Support is available for samples, trial orders, bulk and repeat supply.

    Storage & Shipping

    Product-specific conditions are confirmed before order.

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