Date Printed: 9/25/2025 9. Physical and Chemical Properties Physical State Liquid Decomposition Temperature, °C N.D. Color Not Applicable pH N.A. Odor Characteristic Kinematic Viscosity N.D. Odor Threshold N.E. Solubility in Water Slight Freezing Point / Melting Point, °C N.D. Partition Coefficient, n-octanol/water N.D. Boiling Range, °C 300 - 300 Vapor Pressure N.D. Evaporation Rate Slower than Ether Flammability Does not Support Combustion Lower Explosion Limit, vol% N.A. Specific Gravity 1.233 Vapor Density Upper Explosion Limit, vol% N.A. Heavier than Air Flash Point, °C 210 Particle Characteristics N.A. Auto-Ignition Temperature, °C N.D. (See "Other information" Section for abbreviation legend) 10. Stability and Reactivity Conditions to Avoid: Avoid contact with metals. Avoid excess heat. Incompatibility: Incompatible with strong oxidizing agents, strong acids and strong alkalies. Product slowly corrodes copper, aluminum, zinc, and galvanized surfaces. Hazardous Decomposition: When heated to decomposition, it emits acrid smoke and irritating fumes. Hazardous Polymerization: Will not occur under normal conditions. Stability: This product is stable under normal storage conditions. 11. Toxicological Information Effects of Overexposure - Eye Contact: Can cause severe eye irritation. Causes eye burns. Causes eye and skin irritation which may lead to dermatitis with repeated exposures. Irritating, and may injure eye tissue if not removed promptly. High vapor concentrations can irritate eyes, nose and respiratory passages. Effects of Overexposure - Skin Contact: Prolonged or repeated skin contact may cause irritation. Substance is corrosive. Causes severe skin burns. Causes skin irritation. Allergic reactions are possible. May cause skin sensitization, an allergic reaction, which becomes evident upon re-exposure to this material. Frequent or prolonged contact may irritate the skin and cause a skin rash (dermatitis). Severely irritating; may cause permanent skin damage. Effects of Overexposure - Inhalation: High gas, vapor, mist or dust concentrations may be harmful if inhaled. Avoid breathing fumes, spray, vapors, or mist. High vapor concentrations are irritating to the eyes, nose, throat and lungs. May cause allergic respiratory reaction. Effects of Overexposure - Ingestion: Corrosive and may cause severe and permanent damage to mouth, throat and stomach. Harmful if swallowed. Effects of Overexposure - Chronic Hazards: Individuals with lung or breathing problems or prior reaction to isocyanantes must not be exposed to vapor or spray mist. Vapor and spray mist harmful. Overexposure may cause lung damage. May cause allergic skin and respiratory reaction, effects may be permanent. Prolonged or repeated skin contact may cause dermatitis. PRIMARY ROUTE(S) OF ENTRY: Eye Contact, Ingestion, Inhalation, Skin Absorption, Skin Contact ACUTE TOXICITY VALUES The acute effects of this product have not been tested. Data on individual components are tabulated below: CAS-No. Chemical Name Oral LD50 Dermal LD50 Vapor LC50 101-68-8 4,4'-Diphenylmethane Diisocyanate (MDI) 31600 mg/kg Rat N.E. N.E. 25686-28-6 Benzene, 1,1'-Methylenebis[4-Isocyanato-, Homopolymer >5000 mg/kg Rat N.E. N.E. 128-37-0 Butylated Hydroxytoluene 890 mg/kg Rat >2000 mg/kg Rat N.E. N.E. - Not Established POLYUREA 350 PART A Page 4 / 6
