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    Related: Nutrient Salt Potassium Sulfate Magnesium Chloride
    • Magnesium Sulfate Heptahydrate CAS 10034-99-8

    Magnesium Sulfate Heptahydrate CAS 10034-99-8

    Magnesium Sulfate Heptahydrate (Epsom salt, MgSO₄·7H₂O), CAS 10034-99-8, is a highly soluble hydrated magnesium salt supplied in agriculture, industrial and food/pharma grades for fertilizers, bath salts, personal care, water treatment and chemical processing. Confirm the required grade, then request a quotation with COA/TDS/SDS for bulk supply.

    • CAS: 10034-99-8
    • Synonyms: Epsom Salt, Magnesium sulphate heptahydrate, Sulfuric acid magnesium salt heptahydrate, Bitter Salt
    • Einecs: 231-298-2
    • Molecular Formula: MgSO₄·7H₂O
    • Grade: Agriculture Grade, Industrial Grade, Food/Pharma Grade (Bath Salt)
    • Package: 25kg/50kg PP/PE bags, 1000kg/1200kg Jumbo bags, or customized branded packaging.
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    Product Description

    Magnesium Sulfate Heptahydrate, CAS 10034-99-8, also known as Epsom salt, is the hydrated salt MgSO₄·7H₂O; the EC/EINECS number is 231-298-2.

    Synonyms: Epsom salt; magnesium sulphate heptahydrate; sulfuric acid magnesium salt heptahydrate; bitter salt.

    CAS: 10034-99-8.

    Molecular formula: MgSO₄·7H₂O.

    Molecular weight: 246.47 g/mol.

    EC number: 231-298-2.

    It is a highly soluble, neutral salt supplied as white or colorless crystals in several particle sizes.

    A 5% aqueous solution has a pH of about 5.0–8.0.

    It provides readily available magnesium and sulfur without substantially changing soil pH.

    Agriculture grade is used in base fertilizers, topdressing, foliar sprays and irrigation to correct magnesium and sulfur deficiency.

    Food/pharma and bath-salt grades are used in therapeutic baths, personal-care products and approved nutritional applications.

    Industrial grades are used in paper, textiles, leather, ceramics, water treatment and chemical synthesis.

    Fine powder dissolves quickly for foliar sprays or irrigation, while larger 1–3 mm crystals suit slower dissolution and bath-salt appearance.

    Confirm MgSO₄·7H₂O content, pH, chloride, iron, heavy metals, arsenic, appearance and crystal size or particle-size range.

    Keep bags tightly sealed, as the heptahydrate can lose water of crystallization in dry air or cake in high humidity.

    Store on pallets in a cool, dry, ventilated area away from direct sunlight and strong oxidizing agents.

    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 Sulfate Heptahydrate CAS 10034-99-8?

      A: Magnesium sulfate heptahydrate, commonly called Epsom salt, is a highly water-soluble hydrated magnesium salt with the formula MgSO4·7H2O. It is supplied as white or colorless crystals and used in agriculture, industrial processing, personal care and approved food or pharmaceutical applications.
    • Q:

      How does Magnesium Sulfate Heptahydrate help in agriculture?

      A: It supplies readily available magnesium and sulfur, two essential plant nutrients. Agriculture-grade material is used in base fertilizers, topdressing, foliar sprays and irrigation systems to correct magnesium or sulfur deficiency without substantially changing soil pH.
    • Q:

      Which grade is needed for bath salt or food and pharmaceutical use?

      A: Bath-salt, personal-care, food and pharmaceutical applications require a food or pharmaceutical grade rather than agriculture or industrial grade. The selected material should meet the relevant purity, heavy-metal, arsenic and identity limits.
    • Q:

      What are the main non-agricultural applications?

      A: Typical uses include bath salts, personal-care products, mineral supplements and approved pharmaceutical preparations. Industrial grades are also used in paper, textiles, leather, ceramics, water treatment and chemical synthesis.
    • Q:

      Why does crystal size matter for Magnesium Sulfate Heptahydrate?

      A: Fine powder dissolves quickly and is convenient for foliar sprays or irrigation, while larger 1-3 mm crystals may be preferred for slower dissolution, handling characteristics or specific bath-salt appearance. Buyers should state the desired crystal size or particle-size range.
    • Q:

      What specifications should I check before ordering CAS 10034-99-8?

      A: Confirm MgSO4·7H2O content, pH, chloride, iron, heavy metals, arsenic and appearance. For hydrated material, also note loss on drying or water content, since the heptahydrate can release water of crystallization when heated.

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