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    Related: Water Treatment Polymer PMA PAA
    • Anionic Polyacrylamide CAS 9003-05-8
    • Anionic Polyacrylamide CAS 9003-05-8

    Anionic Polyacrylamide CAS 9003-05-8

    Anionic Polyacrylamide (APAM, anionic PAM), CAS 9003-05-8, is a high-molecular-weight water-soluble flocculant supplied for water treatment and mineral processing. Confirm the required molecular weight and grade, then request a quotation with COA/TDS/SDS for bulk supply.

    • CAS: 9003-05-8
    • Synonyms: PAM, APAM, Anionic PAM, Polyelectrolyte, Acrylamide resin
    • Einecs: 231-545-4
    • Molecular Formula: (C₃H₅NO)ₙ
    • Grade: Anionic polyacrylamide, high molecular weight, industrial / water treatment grade
    • Package: 25 kg kraft paper or PP woven bags with inner PE liner
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    Product Description

    Anionic Polyacrylamide, CAS 9003-05-8, commonly abbreviated APAM or anionic PAM, is a high-molecular-weight water-soluble synthetic polymer with a net negative charge; the EC/EINECS number is 231-545-4.

    Synonyms: PAM; APAM; Anionic PAM; Polyelectrolyte; Acrylamide resin.

    CAS: 9003-05-8.

    Molecular formula: (C₃H₅NO)ₙ.

    EC number: 231-545-4.

    It is a white to off-white granular powder; the solid content is typically at least 89–90%.

    The average molecular weight is about 10–25 million and the degree of hydrolysis is about 10–30 mol% (anionic).

    A 0.1% aqueous solution at 25 °C has a pH of about 6.0–8.0; the product is completely soluble in water and the true density is about 1.2 g/cm³.

    It is used mainly as a flocculant and coagulant aid in municipal and industrial wastewater treatment, sludge dewatering, mineral processing, papermaking and oilfield operations.

    It promotes particle aggregation, faster solid-liquid separation, clearer overflow water and lower sludge volume.

    Anionic PAM is generally more suitable for inorganic particles, metal hydroxides and neutral-to-alkaline slurries, while cationic PAM is often selected for organic sludges.

    Confirm molecular weight, degree of hydrolysis or anionic charge density, solid content, dissolution time, residual monomer and particle size for the target water or sludge chemistry.

    A recommended working solution is about 0.1–0.3 wt% within a pH range of about 5–9; prepare dilute solutions with controlled addition and agitation to avoid lumps.

    Store dry and sealed away from moisture, strong oxidizers and heat, preferably below 30 °C; handle wet surfaces carefully because they can be slippery.

    Confirm the current product-specific specification.

    Confirm packaging with the requested quantity and destination requirements.

    Document requirements should be confirmed from the current specification, SDS, COA or other product-specific files.

    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 specification, quantity, packaging, destination and document needs.

    FAQ - Technical & Supply Chain

    • Q:

      What is Anionic Polyacrylamide CAS 9003-05-8?

      A: Anionic Polyacrylamide is a high-molecular-weight, water-soluble synthetic polymer with a net negative charge. It is supplied under the general polyacrylamide CAS 9003-05-8 and is commonly called APAM or anionic PAM.
    • Q:

      What is Anionic Polyacrylamide used for?

      A: It is used mainly as a flocculant and coagulant aid in industrial and municipal wastewater treatment, sludge dewatering, mineral processing, papermaking and oilfield operations. It promotes particle aggregation and faster solid-liquid separation.
    • Q:

      How does anionic PAM differ from cationic PAM?

      A: Anionic PAM carries a negative charge and is generally more suitable for inorganic particles, metal hydroxides and neutral-to-alkaline slurries. Cationic PAM carries a positive charge and is often selected for organic sludges or systems where the particle charge is negative.
    • Q:

      Which specifications should be checked before choosing an Anionic Polyacrylamide grade?

      A: Confirm molecular weight, degree of hydrolysis or anionic charge density, solid content, dissolution time, residual monomer and particle size. The best grade depends on the target water or sludge chemistry and the required floc strength.
    • Q:

      How should Anionic Polyacrylamide be stored and prepared as a solution?

      A: Store dry, sealed and away from moisture, strong oxidizers and heat. Prepare dilute working solutions with controlled addition and agitation so the powder disperses without forming lumps, and handle wet surfaces carefully because they can be slippery.

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