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 CAS 80-62-6

Methyl methacrylate is a colorless acrylic ester monomer used as a reactive raw material for the manufacture of polymethyl methacrylate, acrylic resins, and related polymer systems. It is the methyl ester of Methacrylic Acid. Also referred to in industrial documentation as methacrylic acid methyl ester and MMA, this material is identified by CAS 80-62-6 and is commonly used in resin production, coating binder manufacture, and other polymer processing applications. This product is generally supplied with competitive factory pricing, customized specifications, supporting documents including MSDS, TDS, COA, and bulk supply options. For a butyl methacrylate comonomer option, n-Butyl Methacrylate (n-BMA) should be compared separately by inhibitor level, assay and resin design.

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

1 Physicochemical Properties

2 Applications

3 Storage & Safety

4 Quality Assurance

Physicochemical Properties

Item	Typical Value / Description
Appearance	Clear, colorless liquid
Assay	Commonly ≥99.0% by GC; exact release limit depends on producer spec
Molecular Weight	100.12
Melting Point	about -48 °C
Boiling Point	about 100–100.5 °C
Relative Density	about 0.93–0.94
Water Solubility	Slightly soluble; about 1.6 g/100 mL at 20 °C
Vapor Pressure	about 3.9 kPa at 20 °C
Flash Point	about 8–10 °C
Refractive Index	about 1.413–1.415
Flammability Limits in Air	about 1.7–12.5 vol%
Stabilization	Typically supplied as stabilized monomer

Applications

Production of PMMA and related acrylic molding or casting resin systems
Reactive monomer for solution, suspension, and emulsion polymerization
Manufacture of acrylic coating resins and binder systems
Copolymer feedstock for pressure-sensitive adhesive and specialty polymer formulations
Intermediate for transparent rigid polymer and methacrylate copolymer production

For acrylic resin formulation requiring a different ester substituent, Ethyl Methacrylate is a related methacrylate monomer with distinct polymer properties.

Storage & Safety

Store methyl methacrylate only in its stabilized form in a cool, dark, and well-ventilated area. Keep the container tightly closed and away from heat, sparks, open flames, strong oxidants, strong acids, and strong bases. Because the vapor is flammable and can form explosive mixtures with air, grounded equipment and non-sparking tools are appropriate for transfer and handling. Recommended PPE typically includes chemical splash goggles, chemical-resistant gloves, suitable protective clothing, and 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.

Quality Assurance

For this product class, a credible factory QC statement should focus on industrial monomer control rather than pharmaceutical-style claims. A sound release program for methyl methacrylate usually covers GC assay, appearance, density or refractive index, moisture, acidity, and inhibitor content, with identity confirmation supported by IR or GC profile matching; NMR may be used for structural confirmation or investigation work, but it is not typically the primary routine release test for every bulk batch. For bulk MMA, it is safer and more realistic to describe plant controls in terms of batch traceability, retained samples, and documented lot release than to claim GMP unless the producer can prove that standard for the specific site. The cited supplier specifications support routine controls such as GC assay, density, boiling point, and refractive index.

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.

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

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Storage & Shipping

Product-specific conditions are confirmed before order.

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