Product Name: Vinyltrimethoxysilane
Synonyms: Trimethoxyvinylsilane, Vinyltrimethoxysilyl
CAS Number: 2768-02-7
Recommended Use: Adhesion promoter, crosslinking agent for polymers, coupling agent
Company Identification: Supplier details and phone numbers for emergencies (manufacturer contact info, address, emergency phone line)
Product Code: Manufacturer product reference
Emergency Overview: Clear, colorless liquid with pungent odor
GHS Classification: Flammable liquids (Category 3), Acute toxicity (Category 4, oral, dermal, inhalation), Serious eye irritation (Category 2), Skin irritation (Category 2)
Signal Word: Danger
Hazard Statements: Flammable liquid and vapor. Harmful if swallowed, inhaled, or absorbed through skin. Causes skin and eye irritation.
Pictograms: Flame, Exclamation mark
Precautionary Statements: Keep away from heat, sparks, open flames, and hot surfaces. No smoking. Use protective gloves/protective clothing/eye protection/face protection. Wash hands thoroughly after handling. Avoid breathing fume/vapor.
Potential Health Effects: Inhalation causes coughing, dizziness, headache, and respiratory tract irritation. Skin contact brings redness, dryness, or dermatitis. Eye exposure results in watering, redness, and discomfort. Swallowing can cause nausea, vomiting, and abdominal pain.
Environmental Hazard: Product is toxic to aquatic life; avoid release to environment.
Chemical Name: Vinyltrimethoxysilane
CAS No.: 2768-02-7
Content: >98%
Impurities: Methanol (possible release by hydrolysis), trace amounts of related silanes
Other Ingredients: Not classified as hazardous as per manufacturer data
Inhalation: Bring the exposed person into fresh air. Ensure airways remain open; provide artificial respiration if breathing stops. Seek immediate medical help as inhalation can cause nausea, dizziness, and headaches.
Skin Contact: Remove contaminated clothing and wash skin thoroughly with water and mild soap. Seek medical attention if irritation persists or symptoms appear.
Eye Contact: Rinse carefully and gently with water for at least 15 minutes. Remove any contact lenses if easy and continue rinsing. Immediate evaluation by a physician is recommended.
Ingestion: Rinse mouth thoroughly with water. Never give anything by mouth if the person is unconscious. Do not induce vomiting but get emergency medical care promptly.
Most Important Symptoms: Irritation, coughing, nausea, skin redness, dizziness
Immediate Medical Attention Required: Yes, especially in cases of inhalation, ingestion, or eye exposure
Suitable Extinguishing Media: Alcohol-resistant foam, dry chemical, carbon dioxide, water spray (do not use solid water jet)
Specific Hazards: Vapors can form explosive mixtures with air, possible flashback along vapor trail; burning produces irritating and toxic fumes, including silicon oxides and formaldehyde
Special Protective Equipment for Firefighters: Full protective clothing and self-contained breathing apparatus
Fire Fighting Instructions: Cool exposed containers with water, stay away from ends of tanks, contain run-off to prevent environmental contamination
Combustion Products: Carbon monoxide, carbon dioxide, silicon oxides, irritating organic vapors
Personal Precautions: Evacuate area and ventilate. Keep public away and isolate spill area. Avoid breathing vapors and direct contact with liquid. Use personal protective equipment including gloves, goggles, and respiratory protection.
Environmental Precautions: Prevent spillage from entering drains or watercourses. Notify authorities in case of large spills or leaks.
Methods for Clean-Up: Absorb liquid with inert materials such as dry earth or sand. Place absorbed material in proper containers for disposal in accordance with local regulations. Use non-sparking tools.
Decontamination Procedures: Wash spill site after material pickup. Dispose of contaminated clothing safely.
Reference to Other Sections: See measures under Exposure Controls/Personal Protection and Disposal Considerations for further safety and waste management information
Safe Handling: Use only with proper ventilation. Ground and bond containers during transfer. Avoid inhaling vapors or mist. Prevent skin and eye contact. Do not eat, drink, or smoke while using.
Storage Conditions: Store in tightly closed, original containers in a cool, dry, and well-ventilated area. Keep away from incompatible materials like strong oxidizers, acids, and alkalis. Store away from heat and direct sunlight.
Container Materials: Suitable for stainless steel or glass, not suitable for aluminum or galvanized metals
Other Precautions: Protect from moisture—hydrolysis may release methanol. Maintain control of sources of static discharge. Keep out of the reach of children.
Exposure Limits: Vinyltrimethoxysilane: No established limits. Control exposure to methanol (TWA 200ppm, STEL 250ppm [OSHA/NIOSH]), a product of hydrolysis.
Engineering Controls: Use local exhaust ventilation, safety showers, and eye wash stations.
Personal Protective Equipment: Chemical-resistant gloves (nitrile, butyl rubber), long-sleeved protective clothing, chemical safety goggles, and suitable respiratory protection in poorly ventilated areas or during potential vapor release.
Environmental Controls: Prevent environmental contamination by using containment methods for spills and adequate waste management.
Hygiene Measures: Wash hands thoroughly after handling. Remove contaminated clothing before reuse.
Physical State: Liquid
Color: Clear, colorless
Odor: Strong, pungent, sweet
Melting Point: -78°C
Boiling Point: 123°C
Flash Point: 27°C (closed cup)
Evaporation Rate: Similar to ethyl alcohol
Flammability: Flammable
Vapor Pressure: 6.7 mmHg at 20°C
Vapor Density: 5.6 (air = 1)
Relative Density: 0.97 g/cm³
Solubility in Water: Hydrolyzes, limited solubility
pH: Not applicable (decomposes in water)
Auto-Ignition Temperature: 240°C
Partition Coefficient (log Kow): 1.5 approx.
Decomposition Temperature: Not available
Viscosity: 0.7 mPa·s at 25°C
Chemical Stability: Stable under recommended storage conditions. Moisture sensitivity due to hydrolysis.
Conditions to Avoid: Moisture, humidity, heat, open flames, ignition sources, direct sunlight
Incompatible Materials: Strong acids, alkalis, oxidizing agents, water (hydrolyzes and releases methanol)
Hazardous Decomposition Products: Methanol, formaldehyde, silicon oxides
Possibility of Hazardous Reactions: Hydrolysis produces methanol; may form flammable or explosive mixtures with air
Reactivity: Reacts with water or humid air, releases flammable gases
Polymerization: Not expected under normal conditions
Acute Toxicity: Oral LD50 (rat): 7120 mg/kg; Dermal LD50 (rabbit): >3460 mg/kg; Inhalation: can irritate respiratory tract and nervous system
Skin Corrosion/Irritation: Causes mild to moderate irritation with possible dermatitis on prolonged exposure
Eye Damage/Irritation: Causes moderate to severe eye irritation
Respiratory Sensitization: No data on sensitization, but can irritate nasal passages and throat
Germ Cell Mutagenicity: Not expected to cause genetic defects under normal use
Carcinogenicity: Not classified as carcinogenic based on available data
Reproductive Toxicity: Methanol (byproduct) is toxic to reproduction in humans
Specific Target Organ Toxicity (STOT): Over-exposure leads to central nervous system effects, such as dizziness and headache
Chronic Effects: On-going exposure may result in skin sensitization and chronic dermatitis
Aquatic Toxicity: Harmful to aquatic organisms due to possible methanol release. LC50 (48hr, Daphnia magna): 252 mg/L. Persistence and Degradability: Expected to hydrolyze and decompose under environmental conditions.
Bioaccumulation: Low potential due to rapid breakdown and limited partitioning to organic matter.
Mobility in Soil: Expected to have high mobility; hydrolyzes to form less mobile species.
Other Adverse Effects: No significant data for ozone depletion or photochemical ozone creation; avoid uncontrolled environmental release.
Further Information: Biodegradation of main byproducts occurs within days under aerobic conditions
Waste Treatment Methods: Dispose of liquid and contaminated materials through licensed chemical waste contractors. Follow regulations for handling organic solvent wastes.
Contaminated Packaging: Empty containers retain residues; treat as hazardous. Rinse containers before recycling or disposal.
Special Precautions: Burn in appropriate incinerator or chemical destruction process after dilution. Do not pour into drains, surface waters, or soil.
Regulatory Information: Comply with local, regional, and national guidelines for hazardous waste handling.
UN Number: UN 1992
Proper Shipping Name: Flammable Liquid, Toxic, N.O.S. (Vinyltrimethoxysilane, Methanol)
Transport Hazard Class: 3 (Flammable liquids), 6.1 (Toxic substances)
Packing Group: III
Marine Pollutant: Not classified
Special Precautions for Transport: Do not transport with incompatible goods such as strong oxidizing agents; avoid temperatures above 50°C
Shipping Labels: Flammable liquid, Toxic
Emergency Response Guide Number: 128
OSHA Status: Classified as hazardous under OSHA Hazard Communication Standard
TSCA: Listed on TSCA inventory
REACH: Registered as a substance in the European Union
SARA Title III: Methanol, a hydrolysis product, is subject to reporting requirements as an extremely hazardous substance
California Prop 65: Methanol listed as a chemical known to cause birth defects or other reproductive harm
Other Regulations: WHMIS (Canada): B2 (Flammable Liquid), D2B (Toxic Material); complies with GHS labeling. Local regulations may apply to storage and disposal.
