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Product name: Diurethane Dimethacrylate Chemical formula: C21H32N2O6 CAS number: 72869-86-4 Common use: Dental resins, advanced polymers, adhesives in manufacturing environments Physical state: Clear liquid; can have a faint acrylic odor Synonyms: DUDMA
Hazard class: Irritant Symptoms from exposure: Skin redness, eye discomfort, respiratory irritation after inhalation of vapors; dermatitis with repeated contact Main risks: Noted for skin and respiratory sensitization, especially in those handling monomeric methacrylates; liquid and vapors irritate mucous membranes Flammability: Can ignite if heated above flash point; vapors may form explosive mixture with air Chronic exposure risks: Allergic reactions in those handling it regularly
Active component: Diurethane dimethacrylate at concentrations above 85% Impurities: Trace levels of other methacrylate monomers or stabilizers; no heavy metals expected Molecular weight: Approximately 408.49 g/mol
Skin contact: Immediate washing with running water and soap; contaminated clothing removal is essential to prevent prolonged exposure Eye contact: Most critical to rinse the eyes with water for at least 15 minutes, keeping eyelids open; medical attention needed for persistent irritation Inhalation: Move to fresh air; those with breathing trouble benefit from medical assessment Ingestion: Rinse mouth, do not induce vomiting; observation for possible gastrointestinal irritation Observation: Sensitivity can build over time, so rapid response helps limit harm
Suitable extinguishing media: Foam, dry chemical powder, or carbon dioxide to suppress flames; water spray limited to cooling surfaces Fire hazards: Thermal breakdown can release toxic fumes such as carbon monoxide, nitrogen oxides, and irritating organic vapors Protective equipment: Full protective gear including self-contained breathing apparatus for responders Explosion risks: Vapors heavier than air may travel to ignition sources; containers can rupture in intense heat
Spill management: Absorb small volumes with inert absorbent material; use non-sparking tools for cleanup Ventilation: Intensive local exhaust or general room ventilation prevents inhalation risks Skin contact prevention: Chemical-resistant gloves, safety goggles, and protective aprons should form standard barrier Disposal: Collected waste stored in compatible, closed containers for regulated disposal Environmental entry: Action should avoid entry to waterways or sewers; environmental risks are real especially if larger spills go unmanaged
Handling practices: Only in well-ventilated settings; direct contact with skin or eyes remains a prime concern Storage standards: Keep in tightly closed, light-resistant containers, away from heat, sparks, and direct sunlight; temperature swings or accidental freezing work against product stability Incompatible substances: Strong oxidizers, acids, base agents, or reducing substances that might promote hazardous polymerization Labeling: Clear hazard signage wherever stored or transferred
Engineering controls: Continuous local exhaust and fume extraction Personal protective equipment: Splash goggles, impervious gloves, lab coats; for extended tasks, a vapor filter respirator makes a big difference, especially if engineering controls lag Hand hygiene: Thorough washing after even minor contact prevents possible skin reactions Workplace safety: Eye wash stations and emergency showers within arm’s reach Exposure limits: No established OSHA PEL or ACGIH TLV for DUDMA specifically, but methacrylates broadly get strict attention in chemical environments
Appearance: Clear to pale yellow viscous liquid Odor: Mildly pungent, distinctive of acrylic compounds Boiling point: Typically above 200°C; rarely volatilizes under routine use Melting point: Does not exhibit a sharp melting as it is a liquid at normal conditions Density: Roughly 1.1–1.2 g/cm³; compares similarly to other high-molecular-weight organic liquids Vapor pressure: Low at room temperature, but can increase with heat Solubility: Insoluble in water, miscible in organic solvents Flash point: Expected above 100°C, demanding careful storage Viscosity: High, making pouring or mixing slow without heating
Chemical stability: Keeps its form under typical storage conditions, but exposure to UV radiation, extremes in temperature, or contamination will accelerate polymerization Hazardous reactions: Uncontrolled polymerization produces extreme heat, can rupture sealed containers Reactive to: Strong acids, bases, peroxides, and other free radical initiators Avoid contact: Sunlight, moisture, oxidizing agents Breakdown products: Combustion or polymerization can generate noxious gases including acrid fumes and low-level formaldehyde
Routes of exposure: Main entry is through skin or inhalation; accidental ingestion occurs in rare laboratory mishaps Acute toxicity: Eye, skin, respiratory tract irritation proven in animal studies and among workers in dental industry settings Sensitization: Documented occupational allergies and dermatitis with repeated or long-term exposure Chronic effects: Respiratory asthma in sensitive individuals; evidence from methacrylate monomers points to increased risk of contact allergies Carcinogenicity: No conclusive IARC, ACGIH, or NTP listing for DUDMA alone; broad methacrylates seen as non-carcinogenic but their breakdown products have separate classifications Mutagenicity and reproductive toxicity: No firm link shown, but caution draws from studies of related acrylate compounds
Aquatic impact: Liquid form sinks in water; chronic aquatic toxicity demonstrated in small species if large quantities get released untreated Persistence: Not rapidly biodegradable, so it lingers in soil and water longer than many simple organics Bioaccumulation potential: Low, judging from structure and available studies Birds, mammals: Low risk in everyday situations, but run-off from large spills threatens smaller mammals in laboratory or industrial settings Wastewater issues: Municipal water treatment systems do not always filter it efficiently before discharge
Preferred route: Controlled incineration at licensed facilities Recycling: Not recommended for this chemical type; cross-contamination and incomplete breakdown issues Container disposal: Fully empty and triple-rinsed containers can go to standard chemical waste streams, but local rules vary Contaminated absorbent: Treat as hazardous waste; separate from general industrial refuse Environmental responsibility: Proactive site monitoring and regular staff training reduce the chances of accidental release at the source
Shipping category: Not regulated as dangerous goods under many international transport codes if below certain quantities, but some shippers classify based on flammability and sensitization risk Packing standards: Leak-proof, chemical-resistant packaging Handling practices during transit: Keep drums upright; surprise leaks or spillage during routing cause headaches and legal headaches Labeling for transit: Include hazard warning diamonds and transport code for easy reference
Global classification: Often included in chemical inventories in the United States, Europe, and Asia GHS status: Labeled with exclamation mark pictogram, warning for skin and eye irritation and sensitization Workplace handling: OSHA Hazard Communication Standard, EU CLP Regulation mark it as chemical hazard in occupational settings Community right-to-know: U.S. SARA Title III does not list it as an extremely hazardous substance, but local rules require reporting large holdings VOC labeling: Regulated as a volatile organic compound in some U.S. regions; requires controls to cut air emissions in progressive states like California
