Methyl Methacrylate Monomer

Methyl Methacrylate Monomer

CAS Number: 80‑62‑6

Chemical Formula:CH₂=C(CH₃)COOCH₃

Overview

A colorless, volatile liquid with a sharp–fruity odor. It’s the primary monomer for making PMMA (acrylic glass). Often stabilized with ~10–30 ppm MEHQ to prevent self-polymerization.

Quick Comparison

Feature Mono‑n‑Butylamine (MNBA) Methyl Methacrylate (MMA)
Physical Form Clear, fishy-smelling liquid Clear, fruity-smelling liquid
Primary Role Aminic intermediate/reactant Acrylic monomer (polymer precursor)
Flash Point Very low (~−14 °C) Low (~2–10 °C)
Solubility Fully miscible in water Moderate (~1.5%)
Hazard Highlights Flammable, corrosive, toxic Flammable, irritant, polymerization risk

Key Physical Properties

  • Molecular weight: ~100.12 g/mol
  • Melting point: approx. −48 °C
  • Boiling point: ~100–101 °C
  • Density: ~0.94 g/cm³ @ 20 °C
  • Vapor pressure: ~37 hPa @ 20 °C
  • Flash point: ~2–10 °C (closed cup)
  • Solubility: moderately water-soluble (~15 g/L @ 20 °C)

Applications

  • PMMA production (acrylic sheets, lenses, coatings) ~80% of usage
  • Used in bone cements, dental prosthetics, contact lenses, adhesives, and paints
  • Employed in coatings, sealants, and a variety of specialty formulations. .
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