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    • Cationic Starch CAS 56780-58-6
    • Cationic Starch CAS 56780-58-6

    Cationic Starch CAS 56780-58-6

    Cationic Starch, a starch modified with a 2-hydroxy-3-(trimethylammonio)propyl ether group, CAS 56780-58-6, is supplied for papermaking and industrial applications. Confirm the required degree of substitution, grade and specification, then request a quotation with COA/TDS/SDS for bulk supply.

    • CAS: 56780-58-6
    • Synonyms: Starch 2-hydroxy-3-trimethylammonium propyl ether chloride, Cationic Starch Ether, Wet End Starch, Quaternary Ammonium Starch, Positively Charged Starch
    • Grade: Technical Grade / Industrial Grade
    • Package: 25kg Kraft Paper Bag (with PE liner) or 850kg Jumbo Bag.
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    Product Description

    Cationic Starch CAS 56780-58-6 is starch modified with a 2-hydroxy-3-(trimethylammonio)propyl ether group, giving the polymer a positive charge.

    Synonyms: Starch 2-hydroxy-3-trimethylammonium propyl ether chloride; Cationic Starch Ether; Wet End Starch; Quaternary Ammonium Starch; Positively Charged Starch.

    CAS: 56780-58-6.

    As a modified starch polymer, it is described by its degree of substitution rather than a fixed molecular formula.

    It is supplied as a white to off-white powder or granules.

    Degree of Substitution (DS) measures the number of cationic groups per glucose unit and therefore the charge density.

    The granular starch is insoluble in cold water and must be cooked or jet-cooked, typically around 95–105 °C, to gelatinize.

    In the papermaking wet end it acts as a retention and drainage aid, neutralizing anionic trash and binding fines and fillers to fibers.

    In surface sizing it improves surface strength and printability.

    Its positive charge makes it useful as a flocculant for sludge dewatering and clarification.

    It can also be applied in textile sizing and selected industrial processes.

    Lower DS values give moderate charge, while higher DS values give stronger charge and retention.

    Store in a cool, dry, well-ventilated area in tightly closed containers to prevent moisture pickup.

    Protect from moisture and direct sunlight.

    Confirm appearance, degree of substitution, moisture, pH and viscosity as required.

    Use dust masks or respirators and eye protection during handling, and wash skin contact with soap and water.

    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 degree of substitution, grade and specification, quantity, packaging, destination and document needs.

    FAQ - Technical & Supply Chain

    • Q:

      What is Cationic Starch CAS 56780-58-6?

      A: Cationic Starch is starch modified with a 2-hydroxy-3-(trimethylammonio)propyl ether group, giving the polymer a positive charge. It is supplied as a white to off-white free-flowing powder and is mainly used in papermaking and industrial flocculation.
    • Q:

      Why is Degree of Substitution important when selecting Cationic Starch?

      A: Degree of Substitution measures the number of cationic groups per glucose unit and therefore the charge density. Lower DS values are often sufficient for linerboard, while higher DS values improve retention and drainage on high-speed machines with high filler content.
    • Q:

      Does Cationic Starch need to be cooked before use?

      A: Yes. The granular starch is insoluble in cold water and must be cooked or jet-cooked, typically around 95-105 C, to gelatinize and unravel the polymer chains. This exposes the cationic groups so they can interact effectively with fibers and fines.
    • Q:

      What functions does Cationic Starch perform in papermaking?

      A: In the wet end it acts as a retention and drainage aid, neutralizing anionic trash and binding fines and fillers to fibers. In surface sizing and internal sizing it improves surface strength, printability, and resistance to dusting or linting.
    • Q:

      Can Cationic Starch CAS 56780-58-6 be used outside papermaking?

      A: Yes. Its positive charge makes it useful as a flocculant for sludge dewatering and clarification, and it can be applied in textile sizing or as a cationic binder. The optimum grade, DS, and dosage depend on the substrate, charge demand, and process conditions.

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