Is Methyl Methacrylate MMA (CAS 80-62-6) Hazardous?

Yes. Methyl methacrylate (MMA, CAS 80-62-6) is a hazardous material. It is a highly flammable liquid and vapor (flash point about 10 °C), irritates the skin, eyes and respiratory tract, and is a potent skin sensitizer. If the inhibitor is depleted or the liquid is overheated, it can polymerize exothermically and may rupture its container.

Basic Information

Chemical Name: Methyl methacrylate

Synonyms: Methyl methacrylate monomer; Methacrylic acid methyl ester; Methyl 2-methylpropenoate

CAS number: 80-62-6

Appearance: Colorless liquid
Boiling Point: ~100–101°C

Flash point: ~10 °C

Transport: UN 1247, Class 3 (confirm on SDS)

Main Hazards of Methyl Methacrylate MMA (CAS 80-62-6)

MMA chemical is a highly flammable liquid and vapor (flash point 10°C) that undergoes a violent polymerization reaction when overheated. It is irritating to the skin, eyes, and respiratory tract, a potent skin sensitizer, and can cause central nervous system reactions. A single exposure can be toxic to specific organs, and it is classified as a hazardous air pollutant.

Methyl methacrylate hazard information:

Health Effects by Exposure Route

Workplace exposure limits vary by country (for example, ACGIH lists a TLV-TWA of 50 ppm - confirm the current value for your jurisdiction). Keep vapor levels as low as practicable.

Fire and Explosion Data

Use foam, dry chemical, carbon dioxide or water spray, and cool exposed containers with water spray; overheated closed containers can polymerize and burst. Refer to the SDS for the batch supplied.

Safe Handling of Methyl Methacrylate liquid

To mitigate risks, taking appropriate safety precautions is crucial:

1. Storage Guidelines

Methyl methacrylate (MMA) should be stored in a cool, well-ventilated place. It must be kept away from heat, sparks, and open flames. Always store this chemical in sealed containers.

2. Personal Protection

Wear chemical goggles and suitable protective clothing, and use respiratory protection where ventilation is poor. Ordinary thin disposable gloves give little protection because methyl methacrylate passes through many common glove materials quickly; choose gloves as specified in the SDS (for example butyl rubber or laminate film gloves) and change them promptly after contact.

3. Workplace Safety

Ensure good ventilation in the work area. Use explosion-proof equipment when handling MMA chemicals. Always follow the instructions in the Safety Data Sheet (SDS). Contact us for the complete SDS.

4. First Aid and Spill Response

• Skin: remove contaminated clothing and wash the skin thoroughly with soap and water.
• Eyes: rinse with plenty of water for several minutes, holding the eyelids open; seek medical attention if irritation persists.
• Inhalation: move to fresh air; seek medical advice if symptoms develop.
• Spill: remove ignition sources, ventilate, absorb with an inert material, keep out of drains and waterways.

These are general measures; follow the first-aid and spill instructions in the SDS.

What is Methyl methacrylate liquid used for?

• Acrylic Plastics (PMMA): Methyl methacrylate (MMA) is used to manufacture clear, rigid PMMA, widely used in automotive parts, signage, safety glass, and consumer products.
• Structural Adhesives: Methacrylate adhesives are used for high-strength bonding of metals, plastics, and composites in the automotive and marine industries.
• Surface Coatings and Paints: Used in outdoor latex paints, varnishes, and enamel resins.
• Medical and Dental: Used in the manufacture of acrylic bone cement, dental crowns, dentures, and fillings.
• Construction and Manufacturing: Used in anti-slip flooring, PVC impact modifiers (MBS resins), and wood/paper impregnation.
• For product details and other uses, click to view the relevant articles.

Methyl methacrylate CAS 80-62-6 MMA supplier

FAQ

Q: Is methyl methacrylate (CAS 80-62-6) hazardous?

A: Yes. MMA is a highly flammable liquid and vapor (H225) that irritates skin, eyes and the respiratory tract and can cause allergic skin reactions (H315, H317, H335).

Q: What is the flash point of MMA?

A: About 10 C, so it forms ignitable vapor at normal room temperature.

Q: Is MMA a skin sensitizer?

A: Yes (H317). Repeated contact can cause an allergic skin reaction, so suitable gloves and protective clothing are essential.

Q: Why must MMA contain an inhibitor?

A: Inhibitors such as MEHQ prevent spontaneous polymerization during storage and transport.

Q: Is solid PMMA as hazardous as MMA?

A: No. Solid PMMA is far less hazardous than the liquid monomer, but it can release monomer and other fumes when heated strongly or burned.

Q: How should MMA be stored?

A: In sealed containers in a cool, well-ventilated place away from heat, sparks and sunlight, and not under an inert atmosphere, because the inhibitor needs dissolved oxygen.

 Related Articles:
Are PMMA and MMA the same?
CAS NO 80-62-6 Methyl Methacrylate (MMA): Key Monomer For PMMA

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