Methyl Methacrylate

Zouping Jinxing Chemical Co., Ltd. is one of the leading manufacturers and suppliers of methyl methacrylate in China. If you're going to wholesale bulk methyl methacrylate made in China, welcome to get free sample from our factory. All customized products are with high quality and low price.

Appearance: Colorless, transparent, free-flowing liquid with a faint sweet taste and ester-like odor (high-concentration vapors have a mild anesthetic effect)
Boiling point: 100.3°C (760 mmHg); Melting point: −48°C
Density: 0.940 g/cm³ (25°C)
Flash point: Approx. 10°C (closed cup) → Highly flammable liquid (GHS Flam. Liq. 2), UN 1247 PG II
Refractive index: n²⁰D ≈ 1.413
Solubility: Slightly soluble in water (approx. 1.6 g/100 mL at 20°C); miscible with alcohols, ketones, esters, aromatic hydrocarbons, and chlorinated hydrocarbons; insoluble in glycerol and ethylene glycol
Polymerization tendency: Undergoes slow spontaneous polymerization at room temperature; initiated by light, heat, peroxides, or free-radical sources; industrial-grade products must contain a polymerization inhibitor (commonly 10–100 ppm MEHQ [p-methoxyphenol] or BHT)

A typical α,β-unsaturated ester: undergoes free-radical polymerization to form PMMA (Plexiglass/acrylic); also processed via emulsion polymerization, suspension polymerization, and bulk casting.
Can be copolymerized with styrene, butyl acrylate, acrylonitrile, etc., to adjust the glass transition temperature (homopolymer Tg ≈ 105°C).
The double bond is susceptible to addition reactions (hydrogenation, halogenation), and the ester group can be saponified to yield methacrylic acid.
Hazards: Exothermic self-polymerization-if the polymerization inhibitor fails and heat dissipation is poor, explosive polymerization and material ejection from the drum can occur; never distill to dryness (due to high-temperature decomposition of residual MEHQ and localized self-polymerization).

Cast/Extruded PMMA: Aircraft canopies, advertising light boxes, light guide plates, dental tray materials
Emulsions and Coatings: Architectural coatings, paper glazing, PVC processing aids (ACR)
Copolymers: MBS (PVC impact modifiers), MMA-styrene copolymers (transparent ABS alternatives), textile sizing agents
Medical: Bone cement (PMMA beads + BA system), dental materials, clear aligner sheets
Electronics: Acrylate segments for photoresists, optical fiber cladding, hard coatings

GHS: H225 Highly flammable; H302/H312 Harmful if swallowed or in contact with skin; H315/H317/H319 Causes skin irritation/may cause an allergic skin reaction/causes serious eye irritation; H335 May cause respiratory irritation.
Vapors irritate eyes, nose, and throat; high concentrations cause headache and drowsiness. Liquid causes defatting of the skin leading to dermatitis; contact allergy in sensitive individuals.
Handling: Use fume hood and explosion-proof equipment; wear nitrile gloves and safety goggles. Store away from light at low temperatures (≤25°C; ideally 15–20°C); keep containers full and nitrogen-blanketed. Periodically measure inhibitor content; conduct a small-scale polymerization test before use if near expiration.
Storage & Transport: Do not store with peroxides, azo compounds, strong acids/bases, or free-radical sources. In case of leakage, cover with foam to prevent evaporation and absorb with sand or earth; do not discharge into open drains (aquatic toxicity).
Firefighting: Use alcohol-resistant foam, CO₂, or dry chemical powder. Risk of explosive polymerization and container explosion due to heat; firefighters must use SCBA.
Before distillation/bulk polymerization: Verify inhibitor status (remove MEHQ via NaOH wash followed by brine wash, or add fresh inhibitor); control temperature ≤80°C; maintain nitrogen blanket; do not distill to dryness.

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