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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 hygroscopic hydrated magnesium chloride supplied for de-icing, dust control, Sorel cement, textiles, water treatment, fireproofing and agricultural magnesium supplementation. Confirm the required grade and specification, then request a quotation with COA/TDS/SDS for bulk supply.

    • 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, CAS 7791-18-6, is the hydrated magnesium chloride crystal containing six water molecules.

    Synonyms: Magnesium dichloride hexahydrate; Magnesium chloride 6H2O; Hydrated magnesium chloride; Bischofite (refined).

    CAS: 7791-18-6.

    It has a molecular weight of about 203.30 g/mol and is usually supplied as white to light-yellow flakes, pellets or granules.

    It is highly hygroscopic and easily soluble in water and ethanol.

    It has a main content of MgCl2 not less than 46.0% and hexahydrate content not less than 98.0%.

    It lowers the freezing point of water and absorbs moisture to bind fine particles, making it useful for de-icing and dust control.

    It is used on unpaved roads and mining sites to suppress dust and stabilize soil.

    It is a key ingredient in magnesium oxychloride cement, also called Sorel cement, for flooring, fireproof boards and wall panels.

    It is used as a coagulant in wastewater treatment and in the production of fire retardants.

    It is used in textiles and paper as a dressing agent and for fireproofing fabrics.

    It is used in agriculture as a magnesium supplement in fertilizers.

    It is also used in artificial seawater and other moisture-related industrial applications.

    Confirm appearance, MgCl2 content, hexahydrate content, calcium, sulfate, alkali chlorides, water insolubles, density, melting point, pH and solubility.

    Store in a dry, cool, well-ventilated area away from strong oxidizing agents and metals.

    Keep containers tightly closed and protect from direct sunlight and rain, as the product is highly hygroscopic.

    Confirm packaging with the requested quantity and destination requirements.

    The page is an RFQ entry point and does not state stock, price, MOQ or fixed lead time.

    For an RFQ, state the intended use, required grade and specification, quantity, packaging, destination and document needs.

    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.

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