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    • Magnesium Chloride CAS 7786-30-3

    Magnesium Chloride CAS 7786-30-3

    Magnesium Chloride (MgCl₂), CAS 7786-30-3, is a hygroscopic inorganic salt supplied in industrial, food and feed grades as anhydrous powder/flakes or hexahydrate flakes for de-icing, dust control, Sorel cement, water treatment and food coagulation. Confirm the required grade, then request a quotation with COA/TDS/SDS for bulk supply.

    • CAS: 7786-30-3
    • Synonyms: Magnesium dichloride, Magnesium(II) chloride, Chloromagnesite, Muriate of magnesium
    • Einecs: 232-094-6
    • Molecular Formula: MgCl₂
    • Grade: Industrial Grade, Food Grade (Nigari), Feed Grade
    • Package: 25kg PP/PE bags, 1000kg/1200kg Jumbo bags, or custom bulk packaging.
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    Product Description

    Magnesium Chloride, CAS 7786-30-3, also known as magnesium dichloride, is the inorganic salt MgCl₂; the EC/EINECS number is 232-094-6.

    Synonyms: magnesium dichloride; magnesium(II) chloride; chloromagnesite; muriate of magnesium.

    CAS: 7786-30-3.

    Molecular formula: MgCl₂.

    Molecular weight: 95.21 g/mol (anhydrous).

    EC number: 232-094-6.

    It is supplied as white flakes, powder or granules in anhydrous form, or as white to light-yellow hexahydrate flakes.

    It is highly soluble in water and highly hygroscopic, dissolving with an exothermic reaction.

    Anhydrous grade is typically at least 99.0% MgCl₂, while the hexahydrate is typically at least 46.0% MgCl₂.

    It is used for low-temperature de-icing and dust control on roads and mining sites.

    It reacts with magnesium oxide to form magnesium oxychloride cement (Sorel cement) for flooring, fireproof boards and grinding stones.

    It is used in water treatment as a flocculant and to help remove phosphorus and heavy metals.

    Food-grade hexahydrate (nigari) is used as a natural coagulant in tofu and mineral-enriched water.

    It is used as a magnesium supplement in fertilizers, animal feed and as a flux in magnesium-metal production.

    Confirm grade, hydration state, MgCl₂ content, calcium, sulfate, alkali metals, heavy metals and insoluble matter.

    Store in tightly sealed moisture-proof bags in a cool, dry, ventilated area away from strong oxidizers.

    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, quantity, packaging, destination and document needs.

    FAQ - Technical & Supply Chain

    • Q:

      What is Magnesium Chloride CAS 7786-30-3, and which hydrated form should be quoted?

      A: Magnesium chloride is the inorganic salt MgCl2, available as anhydrous powder or as the hexahydrate flakes, granules or brine. The anhydrous form is usually quoted for high-purity or magnesium-metal processes, while the hexahydrate is the common industrial, deicing, dust-control and food-grade nigari form.
    • Q:

      Why is magnesium chloride used in Sorel cement?

      A: Magnesium chloride reacts with magnesium oxide to form magnesium oxychloride cement, often called Sorel cement. This produces a strong, quick-setting binder used in industrial flooring, fireproof boards, grinding stones and other construction products where compressive strength and fire resistance are important.
    • Q:

      What are the main non-food industrial applications?

      A: Industrial applications include road deicing and dust suppression, magnesium-metal production, Sorel cement and construction boards, textile processing, water treatment, drilling fluids, ceramics and use as a magnesium source in chemical processing.
    • Q:

      How is food-grade magnesium chloride used in tofu production?

      A: Food-grade magnesium chloride is used as a coagulant in tofu production, where it is often called nigari. The selected grade should meet the purity, heavy-metal and identity requirements for the destination food market.
    • Q:

      Which grades and packaging are available?

      A: The listing covers industrial, food and feed grades, with anhydrous and hexahydrate options. Packaging is normally 25 kg PP/PE bags, 1000 kg or 1200 kg jumbo bags, or custom bulk packaging, depending on the grade and form.
    • Q:

      What specifications should be confirmed before ordering?

      A: Confirm the exact grade, hydration state and magnesium chloride content, plus calcium, sulfate, alkali metals, heavy metals and insoluble matter. Food-grade inquiries should also confirm the grade's identity and any market-specific purity or additive requirements.

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