Product Name: 3-Ureidopropyltriethoxysilane (Methanol 50%)
Chemical Family: Organosilane
Synonyms: Ureido functional silane, silane coupling agent
Manufacturer: Contact supplier for details
Recommended Use: Surface modification, crosslinking
Emergency Contact: Local Poison Center or supplier’s emergency contact number
CAS Numbers: 3-Ureidopropyltriethoxysilane: 23843-64-3, Methanol: 67-56-1
Classification: Flammable liquid (Category 2), Acute toxicity, oral (Category 3 for Methanol), Skin irritation (Category 2), Eye irritation (Category 2)
Signal Word: Danger
Hazard Statements: Highly flammable liquid and vapor. Toxic if swallowed, inhaled, or in contact with skin (Methanol). Causes skin and eye irritation.
Pictograms: Flame, Skull-and-crossbones, Exclamation mark
Precautionary Statements: Avoid breathing vapors. Wash hands thoroughly after handling. Wear protective gloves, eye protection, face protection. Keep away from heat, hot surfaces, sparks, open flames.
Chemical: 3-Ureidopropyltriethoxysilane
Content: 50%
Chemical: Methanol
Content: 50%
Impurities: Low molecular weight siloxanes (trace amounts)
Molecular Formula: C10H24N2O4Si (silane part), CH3OH (methanol)
Inhalation: Remove person to fresh air straight away, keep comfortable for breathing. Seek medical advice if symptoms show up.
Skin Contact: Take off contaminated clothing. Rinse skin with plenty of water for at least 15 minutes. Get medical attention if irritation or pain occurs.
Eye Contact: Rinse with water for at least 15 minutes, opening eyelids wide. Get prompt medical help.
Ingestion: Rinse mouth. Do not give liquids if unconscious. Seek medical attention quickly—methanol poisoning can be serious.
Important Symptoms: Headache, dizziness, nausea, blurred vision (Methanol effects).
Immediate Medical Care: Get medical attention if exposed or concerned; effects may delay up to 24 hours in methanol ingestion.
Suitable Extinguishing Media: Foam, dry chemical powder, carbon dioxide, water spray (for cooling containers, not direct flame attack).
Unsuitable Extinguishing Media: Direct water stream may spread burning liquid.
Fire Hazards: Generates toxic gases including carbon oxides, nitrogen oxides, silicon oxides, formaldehyde.
Specific Hazards: Vapors may form explosive mixtures with air.
Protective Equipment: Firefighters need self-contained breathing apparatus and chemical protection.
Special Procedures: Move containers from fire area if safe. Cool exposed containers with water mist. Keep away from drains as runoff can cause fire or environmental threat.
Personal Protection: Evacuate personnel to safe area. Wear gloves, goggles, respirator. Keep away ignition sources.
Environmental Precautions: Prevent runoff into drains, soil, and waterways. Notify authorities if large spill contaminates environment.
Methods for Containment: Stop leak without risk. Dike area with sand or earth.
Cleanup Methods: Absorb with inert material like sand or vermiculite. Scoop up and put in a lined container for disposal. Wash spill area with plenty of water. Use non-sparking tools.
Handling: Use only with adequate ventilation. Ground containers electrically. Keep away from heat, sparks, open flame, static discharge. Do not eat, drink or smoke while using.
Storage Conditions: Store in tightly-closed containers. Store in a cool, dry well-ventilated area away from oxidizers and acids. Keep container upright and away from incompatible substances.
Incompatibility: Strong oxidizers, acids, moisture, bases. Methanol component reacts with strong acids, alkalis, and oxidizing agents.
Other: Transfer and open containers with care to avoid spills and vapor escape.
Engineering Controls: Provide local exhaust ventilation or general dilution ventilation.
Control Parameters: Methanol ACGIH TLV 200 ppm (260 mg/m3) TWA; OSHA PEL 200 ppm TWA.
Personal Protection: Wear chemical protective goggles, impermeable gloves (nitrile or neoprene), chemical apron or coveralls, and suitable respiratory protection for organic vapor.
Hygiene Measures: Wash hands and face after use. Remove contaminated clothes and wash before reuse.
Environmental Controls: Use spill prevention and containment practices to prevent leaks.
Appearance: Clear or slightly yellowish liquid
Odor: Alcohol-like, slight ammonia odor
Odor Threshold: Detectable at low ppm level (methanol)
pH: Not available
Melting Point/Freezing Point: Below -20°C
Initial Boiling Point and Range: 64.7°C (methanol), 235°C (silane)
Flash Point: 11°C (methanol, closed cup)
Evaporation Rate: Fast (methanol), slow (silane)
Flammability: Flammable liquid
Vapor Pressure: 128 mmHg @ 20°C (methanol)
Vapor Density: Heavier than air
Specific Gravity: 0.97–1.02
Solubility: Miscible with water (hydrolyzes in water)
Partition Coefficient (n-octanol/water): Methanol: -0.77
Auto-Ignition Temperature: 464°C (methanol)
Decomposition Temperature: Not specified
Viscosity: Low to moderate
Chemical Stability: Chemically stable under recommended storages and handling.
Conditions to Avoid: Excess heat, open flames, sparks, static discharge, moisture.
Incompatible Materials: Oxidizing agents, acids, bases, water triggers hydrolysis of silane, methanol can react violently with oxidizers.
Hazardous Decomposition Products: Carbon monoxide, carbon dioxide, silicon oxides, nitrogen oxides, formaldehyde if burned.
Hazardous Polymerization: Does not polymerize under normal conditions.
Reactivity: Methanol vapor forms explosive mixtures with air. Silane component hydrolyzes in moist air.
Routes of Exposure: Inhalation, ingestion, skin and eye contact
Acute Toxicity: Methanol is toxic, LD50 (oral, rat): 5628 mg/kg. Silane data limited though no major acute effects reported at low concentrations.
Symptoms: Dizziness, headache, nausea, blindness, central nervous system depression, skin/eye irritation.
Chronic Effects: Repeat methanol exposure may cause liver and kidney damage, chronic skin dryness.
Carcinogenicity: Not classified for carcinogenicity by IARC, NTP, or OSHA.
Other Risks: Methanol metabolizes to formaldehyde and formic acid, creating risk for permanent eye or nerve damage.
Ecotoxicity: Methanol is moderately toxic to aquatic life, LC50 (fish, 96 h): ~15,400 mg/L
Persistence and Degradability: Methanol is biodegradable. Silane part hydrolyzes in water to release methanol.
Bioaccumulation Potential: Unlikely for methanol (low log Kow), not significant for silane portion.
Mobility in Soil: Methanol moves rapidly, potential to contaminate groundwater. Silane part binds to soil but may release methanol over time.
Other Harmful Effects: Spills may upset sewage microbes and harm plants.
Waste Disposal Methods: Treat as hazardous waste according to local, state, and federal regulations. Send to licensed chemical disposal facility.
Contaminated Packaging: Empty containers retain product residue and vapor. Dispose of containers as hazardous waste.
Other Notes: Do not allow to enter natural waters, sewers, or drains. Incineration recommended by permitted facility. Consult environmental authority for guidance.
UN Number: UN 1992
UN Proper Shipping Name: Flammable Liquid, Toxic, N.O.S. (Methanol, silane solution)
Transport Hazard Class: 3 (Flammable), 6.1 (Toxic)
Packing Group: II
Environmental Hazards: Not classified as marine pollutant by IMDG
Special Precautions for User: Keep containers upright, ventilated, and sealed. Label all containers clearly. Emergency response guide available from DOT or IMDG manuals.
Safety Regulations: Subject to OSHA Hazard Communication Standard (29 CFR 1910.1200). Methanol listed in SARA Title III Section 313, TSCA inventory.
EU Regulation: Methanol classified hazardous under REACH, Regulation (EC) No 1907/2006.
Labeling: GHS pictograms for flame, skull-&-crossbones, exclamation mark required.
California Proposition 65: Methanol known to cause birth defects or reproductive harm in California.
International Inventory: Components listed or exempt in major chemical inventories (TSCA, DSL, EINECS/ELINCS, ENCS, AICS, IECSC).
Restrictions: Use in well-ventilated conditions, avoid releases to the environment, follow national guidance for storage/transport.
