What is Melamine Cyanurate CAS 37640-57-6?

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.

How does MCA improve flame retardancy in PA6 and PA66?

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.

Which Melamine Cyanurate specification values matter for industrial sourcing?

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.

Is MCA suitable for glass fiber reinforced nylon?

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.

What is the difference between Melamine Cyanurate and melamine polyphosphate?

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.

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

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.

Melamine Cyanurate MCA CAS 37640-57-6

Melamine Cyanurate MCA CAS 37640-57-6 is a halogen-free nitrogen-based flame retardant used mainly in polyamide and engineering plastic applications. It is a 1:1 complex of Melamine and Cyanuric Acid; grade and particle-size selection should follow the polymer system. It is commonly selected for PA6, PA66, reinforced nylon, electrical parts, and polymer compounds requiring flame retardant performance with suitable processing compatibility.

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 Grade / Flame Retardant Grade / Plastic Additive Grade
Package: Standard export bags or customized industrial packaging according to grade, quantity, and supply specification

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Product Description

1 Main Applications

2 Product Specifications

3 Packaging and Supply

4 Storage and Handling

Main Applications

Melamine Cyanurate MCA CAS 37640-57-6 is a halogen-free nitrogen-based flame retardant used in engineering plastics and industrial polymer compounds. It is especially relevant for polyamide systems where flame retardant performance, electrical properties, and processing compatibility are important.

In B2B sourcing, MCA is commonly considered for PA6, PA66, glass fiber reinforced nylon, electrical and electronic components, connectors, housings, switches, and other molded or extruded plastic parts. It may also be evaluated in selected TPU, polyester, and other polymer systems depending on formulation design and target performance requirements.

Application Area	Applications
Polyamide PA6 and PA66	Used as a halogen-free flame retardant in nylon compounds and engineering plastic formulations.
Glass Fiber Reinforced Nylon	Suitable for compounders evaluating flame retardant systems for reinforced polyamide materials.
Electrical and Electronic Components	Used in plastic components such as connectors, switches, housings, and molded parts where flame retardancy is required.
Industrial Plastic Compounds	Applied as a functional additive in selected polymer compounds requiring non-halogen flame retardant performance.
Polymer Formulation Development	Can be evaluated with other additives according to processing method, resin type, and required flame retardant standard.

Product Specifications

Melamine Cyanurate is generally supplied as a white powder. For industrial plastic and flame retardant applications, buyers usually evaluate purity, whiteness, particle size, moisture, thermal behavior, residue, and compatibility with the target resin system.

Specification values may vary by grade and supplier standard. Buyers should confirm the current TDS, COA, and application grade before purchase, especially when MCA is used in nylon compounding, reinforced plastic systems, or electrical component materials.

Product Name	Specifications
Abbreviation	MCA
CAS Number	37640-57-6
EINECS	253-575-7
Molecular Formula	C6H9N9O3 / C3H6N6·C3H3N3O3
Molecular Weight	255.2
Appearance	White powder
Product Type	Halogen-free flame retardant; nitrogen-based flame retardant; plastic additive
Typical Grade	Industrial grade / flame retardant grade / plastic additive grade
Key Specification Points	Purity, particle size, moisture, whiteness, thermal stability, residue, and resin compatibility
Specification Documents	COA, TDS, and SDS can be provided according to inquiry and confirmed supply batch.

Packaging and Supply

Melamine Cyanurate MCA CAS 37640-57-6 can be supplied in standard industrial packaging suitable for flame retardant additives and plastic compounding use. Bag packaging is commonly used for powder additives, while packaging details can be discussed according to grade, order quantity, and shipment requirements.

For quotation and grade confirmation, buyers are encouraged to provide the target resin system, intended application, required specification, particle size preference, order quantity, packaging requirement, and destination country or port. This helps confirm whether the available MCA grade is suitable for nylon compounding, electrical components, or other industrial polymer applications.

Storage and Handling

Store Melamine Cyanurate in a cool, dry, and well-ventilated area. Keep the package tightly closed when not in use and protect the product from moisture, contamination, direct sunlight, and excessive heat.

During handling, avoid generating excessive dust and use suitable protective equipment. Processing conditions should be determined according to the buyer’s resin system, compounding equipment, and formulation requirements. Users should review the latest SDS and technical data before production use.

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.

Ordering & Documentation

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

Documents

COA, TDS, SDS/MSDS and packing details are available on request.

Quotation

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

Sample & Supply

Support is available for samples, trial orders, bulk and repeat supply.

Storage & Shipping

Product-specific conditions are confirmed before order.

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