Product Name: N-Propyltriethoxysilane
Other Names: Propyltriethoxysilane
CAS Number: 2550-02-9
Recommended Use: Coupling agent, surface modifier, chemical intermediate
Manufacturer/Supplier: Refer to the label or the responsible supplier’s contact information
Emergency Contact: Access local emergency numbers or poison control centers for chemical incidents
GHS Classification: Flammable Liquid (Category 3), Skin Irritant (Category 2), Eye Irritant (Category 2A)
Signal Word: Warning
Hazard Statements: Flammable liquid and vapor. Causes skin irritation. Causes serious eye irritation.
Pictograms: Flame, Exclamation mark
Precautionary Statements: Keep away from heat, sparks, open flames and hot surfaces. No smoking. Wear protective gloves and eye protection. Wash hands thoroughly after handling.
Chemical Identity: N-Propyltriethoxysilane
Molecular Formula: C9H22O3Si
Concentration: 98-100%
Impurities: Organic solvents or trace stabilizers may be present in minor quantities
Inhalation: Move person to fresh air and maintain breathing. Seek medical attention if symptoms develop.
Skin Contact: Remove contaminated clothing. Wash area with soap and water. Seek medical advice if irritation persists.
Eye Contact: Rinse eyes cautiously with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing. Get medical help for persistent irritation.
Ingestion: Rinse mouth. Do not induce vomiting. Seek immediate medical attention or call poison control.
General Advice: Show physician this safety data sheet.
Suitable Extinguishing Media: Alcohol-resistant foam, dry chemical, carbon dioxide, water-mist spray
Unsuitable Media: Direct water jet can spread burning liquid
Specific Hazards: Releases flammable vapors, risk of explosion in confined spaces, formation of silicon oxides and toxic gases on combustion
Protective Equipment: Wear self-contained breathing apparatus and full protective gear
Special Procedures: Remove all ignition sources, use spray to cool containers, prevent runoff into drains and waterways
Personal Precautions: Evacuate area, use proper respiratory protection, avoid breathing vapors, ventilate area
Environmental Precautions: Prevent spillage from entering soil, drains, surface and groundwater
Containment Methods: Absorb with inert material like sand or earth
Cleanup Methods: Transfer absorbed material to chemical waste containers. Clean spill area with water after removal of material.
Additional Advice: Dispose of in accordance with local, regional, and national regulations
Handling: Avoid contact with skin, eyes, and clothing. Avoid inhalation of vapors. Use in well-ventilated areas. Ground and bond containers when transferring contents. Keep away from ignition sources.
Storage: Store in tightly closed containers. Keep in cool, dry, well-ventilated locations away from incompatible materials (moisture, acids, and oxidizing agents). Protect from heat and direct sunlight.
Occupational Exposure Limits: Not established for N-Propyltriethoxysilane.
Engineering Controls: Use local exhaust ventilation to keep airborne concentrations below recommended limits.
Personal Protective Equipment:
Appearance: Colorless, transparent liquid
Odor: Slight, characteristic
Melting Point: Not determined, typically below -50°C
Boiling Point: 183-185°C at 760 mmHg
Flash Point: 60-70°C (Closed cup method)
Autoignition Temperature: Not specified, generally above 200°C
Explosion Limits: Not defined
Vapor Pressure: 1.8 mmHg at 25°C
Density: 0.88-0.90 g/cm³ at 20°C
Solubility in Water: Reacts slowly with water forming ethanol
Partition Coefficient (n-octanol/water): 2.6 (estimated)
Viscosity: 1.5-2.0 mPa·s at 25°C
Chemical Stability: Stable under recommended storage conditions
Hazardous Reactions: Reacts with water and moisture producing ethanol
Conditions to Avoid: Exposure to moisture, contact with acids or strong oxidizers, heat, sources of ignition
Incompatible Materials: Water, acids, and oxidizers
Hazardous Decomposition Products: Silicon oxides, carbon oxides, ethylene, and ethanol vapor on thermal decomposition
Acute Toxicity: May cause moderate irritation if inhaled, swallowed, or absorbed through skin
Skin Contact: Can cause redness, dryness, cracking
Eye Contact: Severe irritation, possible corneal damage on direct contact
Inhalation: Coughing, breathing difficulty, headaches at high vapor concentrations
Ingestion: Nausea, vomiting, abdominal pain if swallowed
Chronic Effects: Long-term or repeated exposure may result in skin dryness, dermatitis
Carcinogenicity: Not listed as carcinogenic by IARC, NTP, OSHA
Other Health Effects: No evidence indicates reproductive or developmental toxicity with normal use
Aquatic Toxicity: Low acute toxicity to aquatic organisms based on structural analogs
Persistence and Degradability: Hydrolyzes slowly in water, generating ethanol, which biodegrades; parent compound not persistent
Bioaccumulation Potential: Likely low based on high volatility and rapid hydrolysis
Mobility in Soil: Limited data, but expected to exhibit moderate mobility before hydrolysis, then low after transformation
Other Adverse Effects: No evidence for significant ozone depletion, bioaccumulation, or biomagnification in food chains
Waste Disposal Methods: Dispose according to local, regional, or national regulations for flammable chemical waste. Incineration in a chemical incinerator with afterburner and scrubber recommended.
Contaminated Materials: Dispose of used absorbents, clothes, and containers in accordance with applicable waste legislation.
Environmental Cautions: Do not discharge to waterways, soil, or public sewage systems.
UN Number: UN 1993
Proper Shipping Name: Flammable liquid, n.o.s. (contains N-Propyltriethoxysilane)
Transport Hazard Class: 3 (Flammable liquid)
Packing Group: III
Marine Pollutant: No
Special Transport Precautions: Secure containers upright, keep away from incompatible substances and foodstuffs during transport, prevent leakage
TSCA Status: Listed on Toxic Substances Control Act inventory (USA)
EINECS/ELINCS Number: 219-863-1
REACH Status: Registered in accordance with European Union guidelines
SARA Title III: Not specifically listed under Sections 302, 304, or 313
California Proposition 65: Not known to contain substances listed
Other Regulations: Subject to requirements under OSHA Hazard Communication Standard, Canadian WHMIS regulations, and GHS classifications. Always consult local and national authorities regarding specific reporting and registration obligations.
