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    Related: Flame Retardant Additive ATO Zinc Borate
    • Melamine Cyanurate (MCA) CAS 37640-57-6
    • Melamine Cyanurate (MCA) CAS 37640-57-6
    • Melamine Cyanurate (MCA) CAS 37640-57-6

    Melamine Cyanurate (MCA) CAS 37640-57-6

    Melamine Cyanurate, commonly abbreviated MCA, CAS 37640-57-6, is a halogen-free nitrogen-based flame retardant supplied as a white powder and positioned for polyamide and engineering plastic applications. Confirm the required grade, then request a quotation with COA/TDS/SDS for bulk supply.

    • CAS: 37640-57-6
    • Synonyms: Melamine Cyanurate; MCA; Melamine Isocyanurate; Melamine-Cyanuric Acid Complex; Melamine-Cyanuric Acid Adduct
    • Einecs: 253-575-7
    • Molecular Formula: C6H9N9O3 / C3H6N6·C3H3N3O3
    • Grade: Industrial / flame retardant / plastic additive grade
    • Package: Standard export bags or customized industrial packaging
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    Product Description

    Melamine Cyanurate (MCA) CAS 37640-57-6 is a halogen-free nitrogen-based flame retardant, with EC 253-575-7 and molecular formula C6H9N9O3.

    Synonyms: MCA; Melamine Isocyanurate; Melamine-Cyanuric Acid Complex; Melamine-Cyanuric Acid Adduct.

    CAS: 37640-57-6.

    Molecular formula: C6H9N9O3 / C3H6N6·C3H3N3O3.

    It is formed as a 1:1 complex of melamine and cyanuric acid.

    It is supplied as a white powder additive.

    It is positioned for polyamide and engineering plastic applications.

    It is used in unfilled PA6 and PA66 compounds.

    It is used in reinforced nylon and polymer compounds requiring flame retardant performance.

    It is used in electrical parts and flame-retardant masterbatches.

    It provides strong flame retardancy while helping to preserve electrical and mechanical properties.

    It contributes to heat absorption and dilution of combustible gases without bromine or chlorine.

    Confirm the required grade, purity, appearance and whiteness, particle size, moisture, decomposition temperature, residue, and dispersion in the target resin.

    Store in tightly closed containers in a cool, dry, well-ventilated area, away from moisture and direct sunlight.

    Use suitable PPE when handling the powder to prevent dust exposure and skin or eye contact.

    Confirm packaging suitable for the solid form and order quantity, and follow the current SDS.

    Confirm grade, packaging, and specification as required.

    The page is an RFQ entry point and does not state stock, price, MOQ, or fixed lead time.

    For an RFQ, state the intended application, required grade, quantity, packaging, destination, and document needs.

    FAQ - Technical & Supply Chain

    • Q:

      What is Melamine Cyanurate CAS 37640-57-6?

      A: Melamine Cyanurate, commonly abbreviated MCA, is a halogen-free nitrogen-based flame retardant formed as a 1:1 complex of melamine and cyanuric acid. It is supplied mainly as a white powder additive for polyamide and other engineering polymer compounds.
    • Q:

      How does MCA improve flame retardancy in PA6 and PA66?

      A: MCA is especially effective in unfilled PA6 and PA66 because it provides strong flame retardancy while helping to preserve electrical and mechanical properties. During combustion it contributes to heat absorption and dilution of combustible gases, allowing formulations to target high UL 94 ratings without bromine or chlorine.
    • Q:

      Which Melamine Cyanurate specification values matter for industrial sourcing?

      A: Buyers usually compare purity or active content, appearance and whiteness, particle size such as D50 and D97, moisture, decomposition temperature, residue, and dispersion in the target resin. The most suitable grade depends on whether MCA will be used in unfilled nylon, a reinforced compound, or a flame-retardant masterbatch.
    • Q:

      Is MCA suitable for glass fiber reinforced nylon?

      A: MCA is primarily known as a high-efficiency flame retardant for unfilled PA6 and PA66. In glass-fiber reinforced nylon, the resin, fiber content, processing method, particle size, and possible synergists must be evaluated because glass fibers can affect combustion behavior and flame-retardant efficiency.
    • Q:

      What is the difference between Melamine Cyanurate and melamine polyphosphate?

      A: Melamine Cyanurate is a melamine-cyanuric acid adduct most commonly associated with unfilled polyamide flame retardancy. Melamine polyphosphate is a different nitrogen-phosphorus flame retardant that is often used with synergists and can be selected for glass-filled engineering plastics or other polymer systems requiring a phosphorus-based mechanism.
    • Q:

      Why is Melamine Cyanurate described as a halogen-free flame retardant?

      A: MCA does not rely on bromine or chlorine for flame retardancy. Its nitrogen-containing structure and endothermic decomposition behavior support lower-smoke, halogen-free polymer formulations for electrical, electronic, and industrial plastic parts.

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