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    HomeProductsEnergy & AgricultureAgricultural Chemical AdditivesPotassium Sulfate CAS 7778-80-5
    • Potassium Sulfate CAS 7778-80-5

    Potassium Sulfate CAS 7778-80-5

    Potassium Sulfate (CAS 7778-80-5) is a high-purity inorganic salt serving as a premium chloride-free fertilizer source in agricultural crop production and a setting accelerator in industrial gypsum board manufacturing. Chemically identified as Dipotassium sulfate or SOP (Sulfate of Potash), this white crystalline powder functions to deliver essential potassium and sulfur nutrients without inducing salinity stress in sensitive crops like tobacco and fruits. As a stable Sulfuric acid dipotassium salt, it is widely utilized in compound fertilizer blending and technical glass fabrication. We ensure bulk supply capabilities for this material, providing access to competitive factory pricing and customized specifications to meet specific solubility and granule size requirements. Full technical documentation, including MSDS, TDS, COA, is available to support compliance and safety protocols.

    • CAS: 7778-80-5
    • Synonyms: Dipotassium sulfate, SOP, Sulfate of Potash, Sulfuric acid dipotassium salt
    • Einecs: 231-915-5
    • Molecular Formula: K₂SO₄
    • Grade: Agricultural Grade / Water Soluble Grade
    • Package: 9.5kg, 25kg, 50kg PP/PE bags, or 1000kg/1200kg Jumbo bags (Customizable color bags available)
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    Product Description

    Potassium Sulfate is a white crystalline powder or granule that serves as a highly efficient source of Potassium and Sulfur for plants. Unlike Muriate of Potash (MOP), our SOP is virtually free of chloride (Cl ≤ 1.5%), making it the ideal fertilizer for high-value crops that are sensitive to chloride salinity, such as tobacco, fruits, vegetables, and nuts.

    Our product is produced using the Mannheim process or natural brine extraction, ensuring high purity. It improves crop yield, quality, taste, and shelf life while enhancing the plant’s resistance to drought, frost, and disease. The water-soluble grade dissolves quickly, preventing clogging in drip irrigation and spray systems.

    1 Physicochemical Properties
    2 Applications
    3 Storage Conditions
    4 Safety Precautions

    Physicochemical Properties

    ParameterSpecification (Standard Export Grade)
    AppearanceWhite powder or granular
    Potassium Oxide (K₂O)≥ 50.0% / 52.0%
    Potassium (K)≥ 41.5%
    Sulfur (S)≥ 17.5% – 18.0%
    Chloride (Cl⁻)≤ 1.5% (Low Chloride)
    Moisture (H₂O)≤ 1.5%
    Free Acid (as H₂SO₄)≤ 1.5%
    Water Insolubles≤ 0.5% (For water soluble grade)
    pH Value4.0 – 7.0 (Typically neutral to slightly acidic)
    SolubilityApprox. 110g/L at 20°C

    Applications

    1. Chloride-Sensitive Crops: Essential for fertilizing tobacco, grapes, citrus fruits, tea, potatoes, and tomatoes where chloride can damage quality or burn roots.
    2. Fertigation & Foliar Spray: The water-soluble powder is suitable for drip irrigation, sprinkler systems, and foliar application, ensuring rapid nutrient uptake.
    3. Compound Fertilizer Raw Material: Used as a premium K-source for manufacturing NPK compound fertilizers.
    4. Saline Soil Agriculture: Ideal for use in soils with high salinity levels as it has a lower salt index compared to Potassium Chloride.
    5. Quality Enhancement: Increases sugar content in fruits, improves the burning quality of tobacco, and enhances the color of flowers.

    Storage Conditions

    • Environment: Store in a cool, dry, and well-ventilated warehouse.
    • Moisture Protection: Although less hygroscopic than other fertilizers, it should still be kept away from rain and moisture. Keep bags tightly sealed.
    • Stacking: Store on pallets, avoiding direct contact with the floor. Do not stack too high to ensure stability.
    • Segregation: Keep away from sources of heat and incompatible materials.

    Safety Precautions

    • Handling: Wear protective gloves, safety glasses, and a dust mask to avoid inhaling dust during application.
    • Skin Contact: Wash thoroughly with soap and water after handling. Prolonged contact may cause mild irritation.
    • Eye Contact: Rinse with plenty of water immediately if dust enters the eyes.
    • General: This product is non-toxic and non-flammable but should be kept out of reach of children and pets.

    FAQ - Technical & Supply Chain

    • Q:

      Chemically speaking, what distinguishes Potassium Sulfate CAS 7778-80-5 from other potassium sources?

      A: Potassium Sulfate (CAS 7778-80-5) is characterized as a chloride-free inorganic salt, chemically known as Dipotassium sulfate or SOP, supplied specifically for applications requiring low salt index and high sulfur content.
    • Q:

      Is this material suitable for use on chloride-sensitive agricultural crops?

      A: Yes, this product is typically applied in the cultivation of chloride-sensitive plants such as tobacco, fruits, and vegetables, providing essential nutrients while minimizing the risk of chloride toxicity and soil salinity.
    Documents

    Documents and Product Support

    For product review and sourcing evaluation, supporting documents can be coordinated according to the product type, inquiry stage, and order requirements.

    • COA for batch-based quality reference
    • TDS for key physical and chemical information
    • SDS / MSDS for handling, storage, and safety reference
    • Packing information for sample, trial, and bulk orders
    • Technical communication based on application and specification requirements
    Quotation

    Information to Confirm Before Quotation

    Clear sourcing information helps reduce specification mismatch and allows a more accurate quotation before sample or bulk order discussion.

    • Product name and CAS number
    • Application or intended end use
    • Required purity, grade, or specification
    • Sample quantity, trial order, or bulk demand
    • Preferred packing form or net weight
    • Destination country or port
    • Required documents or compliance expectations
    Storage & Handling

    Packaging, Storage, and Handling Notes

    Packaging form, storage conditions, shelf life, and shipment arrangements should be confirmed according to the product characteristics, package size, and destination requirements.

    Before order confirmation, buyers are advised to review the corresponding product documents and confirm whether any special storage, labeling, or handling requirements apply.

    Supply Support

    Sample, Bulk Order and Repeat Supply Support

    Support can be arranged for sample discussion, bulk supply planning, packaging confirmation, and routine sourcing communication based on the actual product and order requirements.

    For repeat-use formulations or long-term procurement plans, buyers may discuss specification consistency, packaging preferences, delivery expectations, and document coordination in advance.

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    Fertilizer Ingredient Inorganic Sulfate Nutrient Salt Potassium Salt

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