Methyl Acrylate

A: Primary hazards: Strong irritant and sensitizing properties, particularly affecting the eyes and respiratory tract. Acute effects: Vapors strongly irritate the eyes, nose, and throat, causing tearing, coughing, and chest tightness; high concentrations can lead to pulmonary edema; liquid splashes into the eyes can cause corneal burns or even blindness; skin contact causes redness, swelling, burning pain, and dermatitis. Chronic/Allergic effects: Repeated exposure can lead to allergic dermatitis and asthma; it is a known respiratory sensitizer. LD₅₀ (rat, oral): Approx. 277 mg/kg (moderately toxic); Inhalation LC₅₀ (rat, 4h): Approx. 3.5 mg/L. Carcinogenicity: Classified by IARC as Group 3 (not classifiable as to its carcinogenicity to humans); however, long-term animal studies have shown controversial results regarding tumor incidence at high doses. Occupational exposure limits: China GBZ 2.1: PC-TWA 20 mg/m³ (≈5.7 ppm), PC-STEL 40 mg/m³ (Skin) ACGIH TLV-TWA: 10 ppm (Skin notation) OSHA PEL: 10 ppm (TWA) 

A: Three-pronged safety approach (ventilation, polymerization prevention, and contact prevention): Operations must be conducted inside an explosion-proof fume hood utilizing both local exhaust and general ventilation; monitor airborne concentrations in real-time. Polymerization prevention: Must be stored with a polymerization inhibitor (typically 10–50 ppm MEHQ/hydroquinone monomethyl ether); store away from light and at low temperatures (refrigeration at 2–8°C is preferred); avoid contact with peroxides, strong acids, strong bases, and amines (which can trigger violent, exothermic polymerization). PPE: Chemical-resistant goggles/face shield (splash protection!), nitrile or neoprene gloves, chemical-resistant protective clothing, and an organic vapor respirator; bare-hand handling is strictly prohibited; change work clothing immediately if contaminated. Storage: Store in a sealed, cool, well-ventilated, explosion-proof facility (≤30°C); keep separate from oxidizing agents, acids, and bases; periodically check inhibitor levels. Leakage handling: Collect using sand, soil, or inert absorbent materials; for large spills, transfer to a dedicated collection vessel using an explosion-proof pump; dispose of via incineration as hazardous organic waste containing unsaturated bonds. Firefighting: Use alcohol-resistant foam, dry chemical powder, CO₂, or sand/soil; do not use direct water jets (which can cause splashing and spread the material).