Product Name: 3-Ureidopropyltriethoxysilane
Chemical Formula: C10H24N2O4Si
CAS Number: 23843-64-3
Synonyms: N-[3-(Triethoxysilyl)propyl]urea
Recommended Use: Coupling agent in adhesives, sealants, surface modifiers, raw material for organic synthesis
Manufacturer/Supplier: Contact supplier for address and emergency number
Emergency Phone Number: Refer to local regulations or supplier contact
Relevant Identified Uses: Industrial, laboratory, or professional settings where silane compounds are handled frequently
Classification: Eye irritation (Category 2), Skin irritation (Category 2), Respiratory tract irritation
Label Elements: Signal word: Warning; GHS pictograms: Exclamation mark
Hazard Statements: Causes skin and eye irritation; May cause respiratory irritation; Flammable liquid and vapor; Harmful if inhaled
Precautionary Statements: Avoid breathing vapors; Use in a well-ventilated place; Wear gloves and eye protection
Potential Health Effects: Prolonged exposure may lead to headaches, dizziness; In severe cases, respiratory tract discomfort or aggravation of asthma
Other Hazards: Possible formation of explosive mixtures with air; Hydrolysis produces ethanol, which has its own hazards
Substance: 3-Ureidopropyltriethoxysilane
CAS Number: 23843-64-3
Concentration: > 98% by weight
Minor Components: Ethanol as a potential hydrolysis product; Trace amounts of unreacted monomers or processing aids
Impurities: Impurities, if present, at concentrations unrelated to toxicity
General Instructions: Remove victim from exposure, assess vital signs, provide fresh air
Inhalation: Move to fresh air, watch for breathing discomfort, seek medical attention if symptoms persist
Skin Contact: Wash with plenty of soap and water; Remove contaminated clothing and shoes; Seek medical advice if irritation continues
Eye Contact: Rinse eyes thoroughly with water for at least 15 minutes, lifting both eyelids; Seek medical attention promptly
Ingestion: Rinse mouth with water; Do not induce vomiting unless directed by medical personnel; Monitor for symptoms, contact physician immediately
Self-Protection for First Aiders: Use gloves, goggles, and respiratory protection if there is a risk of exposure to vapor or splashes
Suitable Extinguishing Media: Carbon dioxide, dry chemical powder, alcohol-resistant foam
Unsuitable Media: Water jet, which may spread liquid
Hazards from Combustion: Produces carbon oxides, nitrogen oxides, silicon oxides, and irritating vapors
Protective Equipment: Self-contained breathing apparatus, full protective gear
Special Precautions: Move containers from fire area if possible; Use water spray to cool containers; Prevent runoff from contaminating water supplies
Fire Characteristics: Vapors are heavier than air, may travel to ignition source and flash back; Heat may cause pressure rise and potential container rupture
Personal Precautions: Evacuate unnecessary personnel, ventilate area, wear appropriate PPE (gloves, goggles, respirator)
Environmental Precautions: Prevent spillage into drains, surface or ground water; Notify authorities as required by regulations
Cleanup Methods: Contain spill with inert absorbent (sand, vermiculite); Scoop up and place in labeled containers for disposal; Wash affected area with water; Dispose in accordance with local, regional, national regulations
Preventive Actions: Remove ignition sources, avoid breathing vapor; Do not touch spilled material without PPE
Handling: Use only in well-ventilated areas; Wear recommended personal protective equipment; Keep containers tightly closed; Avoid contact with eyes, skin, and clothing; Do not breathe vapor
Hygiene Measures: Wash hands after handling; Remove contaminated clothing and wash before reuse; Ensure eye wash stations and safety showers are accessible
Storage Conditions: Store in tightly closed containers, away from moisture, incompatible substances, heat, and direct sunlight
Safe Storage Materials: Stainless steel, polyethylene, or glass containers; Avoid copper, aluminum, or their alloys
Incompatibilities: Strong oxidizers, acids, alkalis; Water/moisture (causes hydrolysis and ethanol release)
Control Parameters: Occupational exposure limits for 3-Ureidopropyltriethoxysilane are not established; Observe ethanol limits if hydrolysis occurs
Engineering Controls: Use local exhaust ventilation, process enclosure, or other engineering controls to keep airborne levels below recommended limits
Personal Protection: Eye/face protection (safety goggles, face shield); gloves resistant to chemical penetration (nitrile, neoprene); lab coat or long-sleeved clothing; approved respirators where vapor concentrations exceed limits or if ventilation is insufficient
Environmental Protection: Reduce vapor or mist release; Use closed-process systems where possible
Appearance: Clear to slightly cloudy liquid
Odor: Faint ammonia or alcohol-like
Odor Threshold: Not determined
pH: Not applicable (hydrolyzes in water)
Melting Point/Freezing Point: Not established
Boiling Point/Range: Approx. 130–150°C
Flash Point: 87°C (closed cup)
Evaporation Rate: Not determined
Flammability: Flammable liquid
Vapor Pressure: Lower than water at room temperature
Vapor Density: Heavier than air
Solubility: Reacts with water, soluble in organic solvents
Partition Coefficient: Not established
Autoignition Temperature: Approx. 250°C
Decomposition Temperature: No information
Viscosity: Slightly viscous
Chemical Stability: Stable under standard dry, cool conditions; slowly hydrolyzes in presence of moisture
Reactivity: Contact with water leads to hydrolysis and ethanol formation
Hazardous Reactions: May react violently with strong oxidizing agents, generate flammable ethanol vapor with water
Conditions to Avoid: Moist air, open flames, high temperatures, sparks, contact with incompatible materials
Incompatibility: Oxidizers, acids, alkalis, moisture
Decomposition Products: Ethanol, nitrogen oxides, silicon oxides, carbon oxides
Acute Toxicity: Data limited; ingestion or inhalation may cause gastrointestinal discomfort, headache, nausea
Skin Corrosion/Irritation: Causes moderate to severe irritation on prolonged or repeated contact
Eye Damage/Irritation: Causes eye irritation, redness, watering, discomfort
Respiratory Sensitization: Inhalation of vapors may cause nasal or respiratory tract irritation
Carcinogenicity: Not listed as a carcinogen by NTP, IARC, or OSHA
Mutagenicity: No data
Reproductive Toxicity: Not evidenced in available literature
Target Organs: Eyes, skin, respiratory system
Other Information: Persons sensitized to amines or silane compounds may display heightened responses
Ecotoxicity: Harmful to aquatic organisms; potential for long-term adverse effects in aquatic environments
Persistence and Degradability: Undergoes hydrolysis and degradation to less harmful products in the environment, mediated by moisture
Bioaccumulative Potential: Low, due to rapid hydrolysis and limited lipophilicity
Mobility in Soil: Moderate to high, reacts with water, may leach through soil layers
Other Adverse Effects: Ethanol released may impact aquatic systems by oxygen demand increase or toxicity
Precaution for Water Disposal: Prevent large release into water bodies to avoid acute environmental impact
Waste Treatment: Dispose through chemical incineration or as hazardous waste, observing local regulations
Contaminated Packaging: Rinse thoroughly, dispose according to official requirements
Precautions: Avoid contact with water during disposal; incinerate with care for release of vapors and combustion products
Special Instructions: Never dispose in regular trash, sink, or sewer; hazardous waste collector pick-up is recommended
UN Number: 1993
UN Proper Shipping Name: Flammable liquid, n.o.s. (contains 3-Ureidopropyltriethoxysilane)
Transport Hazard Class: 3 (Flammable liquid)
Packing Group: III
Labels: Flammable liquid (red diamond 3)
Special Precautions for User: Transport upright in original containers, away from food, feed, and living quarters; Avoid direct sunlight and keep away from sources of heat
Marine Pollutant: No data suggesting
Status: Not directly regulated under all global chemical regimes, but falls within general chemical and workplace safety regulations
Safety Assessments: Covered under OSHA Hazard Communication; listed in TSCA; substance may be subject to REACH reporting in the European Union
Labeling Requirements: Follow local and international regulations for handling and transport
Restrictions / Prohibitions: Industrial and laboratory use only; not intended for consumer or food-related applications
Other Regulatory Notes: Information available through supplier’s safety data support lines; site-specific requirements may apply in different regions
