What is Methyl Methacrylate CAS 80-62-6?

Methyl methacrylate, or MMA, is a clear, colorless methacrylate ester monomer with the molecular formula C5H8O2 and a molecular weight of about 100.12. It is also known as methacrylic acid methyl ester or methyl 2-methylpropenoate.

Why is Methyl Methacrylate supplied as a stabilized monomer?

MMA readily undergoes free-radical polymerization, so it is normally inhibited with a small amount of stabilizer such as MEHQ. The inhibitor helps prevent premature polymerization during storage, handling, and transport.

What are the main industrial applications of CAS 80-62-6?

It is used as the monomer for polymethyl methacrylate and acrylic molding or casting systems, and as a reactive monomer in solution, suspension, and emulsion polymerization. It is also used to make acrylic coatings, binders, pressure-sensitive adhesives, and specialty copolymers.

What are typical specifications for industrial or stabilized monomer grade MMA?

The product is a clear colorless liquid with a GC assay commonly at least 99.0%, relative density about 0.93-0.94, refractive index about 1.413-1.415, and boiling point near 100-101 C. Inhibitor type and level are specified according to the selected storage and transport profile.

What storage and handling precautions apply to Methyl Methacrylate CAS 80-62-6?

Store it only in its stabilized form in a cool, dark, well-ventilated area away from heat, sparks, flames, strong oxidants, strong acids, and strong bases. Grounded equipment and non-sparking tools are appropriate because the vapor is flammable and can form explosive mixtures with air.

How does Methyl Methacrylate differ from Ethyl Methacrylate?

Both are methacrylate monomers, but MMA contains a methyl ester group while ethyl methacrylate contains a longer ethyl ester group. That difference changes polymer glass transition, hardness, flexibility, and end-use performance, so the two are not interchangeable in most acrylic formulations.

Methyl Methacrylate (MMA) CAS 80-62-6

Methyl methacrylate (MMA), also called methacrylic acid methyl ester, CAS 80-62-6, is a clear, colorless stabilized acrylic monomer supplied for PMMA, coatings, binders, adhesives, and copolymer applications. Confirm the required grade and specification, then request a quotation with COA/TDS/SDS for bulk supply.

CAS: 80-62-6
Synonyms: Methyl Methacrylate; MMA; Methacrylic Acid Methyl Ester; Methyl 2-Methylpropenoate; 2-Propenoic acid, 2-methyl-, methyl ester
Einecs: 201-297-1
Molecular Formula: C5H8O2
Grade: Industrial grade / stabilized monomer grade
Package: 190 kg drum / tank container

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Product Description

Methyl Methacrylate (MMA) CAS 80-62-6, also called methacrylic acid methyl ester, is an acrylic ester monomer with the molecular formula C5H8O2 and EINECS 201-297-1.

Synonyms: Methyl methacrylate; MMA; Methacrylic acid methyl ester; Methyl 2-methylpropenoate; 2-Propenoic acid, 2-methyl-, methyl ester.

CAS: 80-62-6.

Molecular formula: C5H8O2.

It is a clear, colorless liquid with a GC assay commonly not less than 99.0% and molecular weight about 100.12.

Melting point is about -48 °C, boiling point about 100-100.5 °C, and relative density about 0.93-0.94.

It is slightly soluble in water (about 1.6 g/100 mL at 20 °C), with vapor pressure about 3.9 kPa at 20 °C and refractive index about 1.413-1.415.

Flash point is about 8-10 °C, with flammability limits in air about 1.7-12.5 vol%; it is normally supplied as a stabilized monomer.

It is the monomer for PMMA and related acrylic molding or casting resin systems.

It is a reactive monomer for solution, suspension, and emulsion polymerization, and for acrylic coating resins and binder systems.

It is a copolymer feedstock for pressure-sensitive adhesives and specialty polymer formulations.

It is an intermediate for transparent rigid polymers and methacrylate copolymers.

Store only in stabilized form in a cool, dark, well-ventilated area away from heat, sparks, open flames, strong oxidants, strong acids, and strong bases; use grounded equipment and non-sparking tools.

Wear chemical splash goggles, chemical-resistant gloves, protective clothing, and use local exhaust ventilation where vapor exposure may occur.

Hazardous polymerization can occur if inhibitor levels are not maintained; MMA is shipped as UN1247, Methyl Methacrylate Monomer, Stabilized, Class 3, Packing Group II.

Every batch is checked by GC assay, appearance, density/refractive index, moisture, acidity, and inhibitor content, with identity confirmed by IR/GC profile matching.

Confirm appearance, assay, density, refractive index, boiling point, moisture, acidity, inhibitor content, packaging, and grade 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 Methyl Methacrylate CAS 80-62-6?

A: Methyl methacrylate, or MMA, is a clear, colorless methacrylate ester monomer with the molecular formula C5H8O2 and a molecular weight of about 100.12. It is also known as methacrylic acid methyl ester or methyl 2-methylpropenoate.
Q:
Why is Methyl Methacrylate supplied as a stabilized monomer?

A: MMA readily undergoes free-radical polymerization, so it is normally inhibited with a small amount of stabilizer such as MEHQ. The inhibitor helps prevent premature polymerization during storage, handling, and transport.
Q:
What are the main industrial applications of CAS 80-62-6?

A: It is used as the monomer for polymethyl methacrylate and acrylic molding or casting systems, and as a reactive monomer in solution, suspension, and emulsion polymerization. It is also used to make acrylic coatings, binders, pressure-sensitive adhesives, and specialty copolymers.
Q:
What are typical specifications for industrial or stabilized monomer grade MMA?

A: The product is a clear colorless liquid with a GC assay commonly at least 99.0%, relative density about 0.93-0.94, refractive index about 1.413-1.415, and boiling point near 100-101 C. Inhibitor type and level are specified according to the selected storage and transport profile.
Q:
What storage and handling precautions apply to Methyl Methacrylate CAS 80-62-6?

A: Store it only in its stabilized form in a cool, dark, well-ventilated area away from heat, sparks, flames, strong oxidants, strong acids, and strong bases. Grounded equipment and non-sparking tools are appropriate because the vapor is flammable and can form explosive mixtures with air.
Q:
How does Methyl Methacrylate differ from Ethyl Methacrylate?

A: Both are methacrylate monomers, but MMA contains a methyl ester group while ethyl methacrylate contains a longer ethyl ester group. That difference changes polymer glass transition, hardness, flexibility, and end-use performance, so the two are not interchangeable in most acrylic formulations.

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