Language

Current Language
    Change Language
    Chemical products
    • Potassium Sulfate CAS 7778-80-5

    Potassium Sulfate CAS 7778-80-5

    Potassium Sulfate (SOP, K₂SO₄), CAS 7778-80-5, is a chloride-free potassium and sulfur fertilizer supplied in agricultural and water-soluble grades for chloride-sensitive crops, fertigation, foliar feeding and compound fertilizers. Confirm the required grade, then request a quotation with COA/TDS/SDS for bulk supply.

    • 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)
    Request a quote
    Share:

    Product Description

    Potassium Sulfate, CAS 7778-80-5, also known as sulfate of potash or SOP, is the dipotassium salt of sulfuric acid K₂SO₄; the EC/EINECS number is 231-915-5.

    Synonyms: dipotassium sulfate; SOP; sulfate of potash; sulfuric acid dipotassium salt.

    CAS: 7778-80-5.

    Molecular formula: K₂SO₄.

    Molecular weight: 174.26 g/mol.

    EC number: 231-915-5.

    It is supplied as white or off-white crystals, powder or granules with low chloride content.

    Agricultural grade typically provides at least 50.0–52.0% K₂O and about 17.5–18.0% sulfur.

    Water-soluble grade dissolves readily for drip irrigation, foliar feeding and liquid fertilizer formulations.

    It is ideal for chloride-sensitive crops such as tobacco, grapes, citrus, fruit trees, vegetables and potatoes.

    It is used as a premium potassium source in NPK compound fertilizers and for saline-soil agriculture.

    It improves crop yield, quality, taste and shelf life, and enhances resistance to drought, frost and disease.

    It is also used in industrial chemical processes, glass manufacture and permitted food or pharmaceutical applications.

    Confirm K₂O content, sulfur content, chloride, moisture, pH, water-insoluble matter and particle size.

    Store in tightly sealed bags in a cool, dry, ventilated warehouse, away from rain, moisture and heat sources.

    Keep bags on pallets, avoid direct floor contact and do not stack too high for stability.

    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 Potassium Sulfate CAS 7778-80-5?

      A: Potassium sulfate, also called sulfate of potash or SOP, is the dipotassium salt of sulfuric acid with the formula K2SO4. It is supplied as white or off-white crystals, powder or granules and used mainly as a chloride-free potassium and sulfur fertilizer.
    • Q:

      Why choose Potassium Sulfate instead of potassium chloride?

      A: Potassium sulfate supplies potassium without chloride, making it suitable for chloride-sensitive crops such as tobacco, grapes, citrus, fruit trees, vegetables and potatoes. It also provides sulfur, an essential secondary plant nutrient.
    • Q:

      How is water-soluble Potassium Sulfate used in fertigation?

      A: Water-soluble-grade SOP dissolves readily and is used in drip irrigation, foliar feeding and liquid fertilizer formulations. Selecting the water-soluble grade with low water-insoluble matter helps avoid clogging in emitters and spray systems.
    • Q:

      How soluble is Potassium Sulfate CAS 7778-80-5?

      A: Potassium sulfate is commonly cited as dissolving at about 110 g/L at 20 C, with solubility increasing as temperature rises. It is less soluble than potassium chloride, so water-soluble grade and proper agitation are important for concentrated stock solutions.
    • Q:

      What are the main applications beyond fertilizer?

      A: In addition to agricultural and horticultural fertilizers, potassium sulfate is used in industrial chemical processes, glass manufacture and certain food or pharmaceutical applications where an appropriate grade is permitted.
    • Q:

      Which specifications should I check before ordering SOP?

      A: Confirm K2O content, sulfur content, chloride, moisture, pH, water-insoluble matter and particle size. Agricultural and water-soluble grades usually differ in chloride and water-insoluble limits, so match the specification to fertigation or dry-fertilizer use.

    Ordering & Documentation

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

    Documents

    Tell us which documents your procurement team needs. Before an order, we will check whether the quoted source can provide them for the offered lot.

    Quotation

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

    Sample & Supply

    Ask whether samples, trial quantities or repeat orders are possible. We will check each request against the sourced product and current offer.

    Storage & Shipping

    Product-specific conditions are confirmed before order.

    Contact Form

    Use our contact form to send us your questions, suggestions or comments. We will respond as soon as possible.
    For a quotation, please include the product name or CAS number, quantity, grade or application, and destination country or port. Tell us if you need a sample, COA, TDS or SDS.

    Product Categories

    Related Products