Product Name: Trimethylisopropenoxysilane
Chemical Formula: C7H16OSi
CAS Number: 2914-05-2
Manufacturer: Major chemical companies globally produce and distribute this chemical; contact information typically available through supplier documentation.
Recommended Use: Intermediate in synthesis of organosilicon compounds, surface treatment, resin modifier.
Emergency Phone Number: Numbers differ based on business region and supplier but standard emergency lines cover chemical incidents.
Synonyms: 1-Methylethenyloxytrimethylsilane, Isopropenoxytrimethylsilane.
GHS Classification: Flammable liquids (Category 2), Acute toxicity (Category 4, inhalation), Skin irritation (Category 2), Serious eye irritation (Category 2A).
Hazard Symbol: Flame, Exclamation Mark
Signal Word: Danger
Hazard Statements: Highly flammable liquid and vapor. Harmful if inhaled. Causes skin and serious eye irritation.
Precautionary Statements: Keep away from heat, sparks, open flames. Use explosion-proof equipment. Avoid breathing vapor. Wash hands thoroughly after handling. Wear protective equipment such as gloves, goggles, and suitable clothing.
Chemical Name: Trimethylisopropenoxysilane
Concentration: Over 99% by weight in pure product
Impurities: May contain trace siloxane compounds or hydrolysis products less than 1%
Other Components: No intentionally added stabilizers or solvents
Inhalation: Move affected individual to fresh air promptly. If breathing difficulties continue, provide oxygen or seek medical attention. Observe for respiratory symptoms up to several hours after exposure.
Skin Contact: Remove contaminated clothing. Immediately wash exposed areas with plenty of water for fifteen minutes. Use mild soap. Seek medical help for burns, persistent redness, or blisters.
Eye Contact: Rinse eyes intensively with flowing water for fifteen minutes, lifting the eyelid occasionally. Get ophthalmological evaluation in the case of swelling, pain, or vision changes.
Ingestion: Do not induce vomiting. Rinse mouth with water. Get medical advice quickly. If individual loses consciousness, do not offer anything by mouth.
Note: Emergency responders need to use protective gear and avoid exposure to vapors.
Suitable Extinguishing Media: Alcohol-resistant foam, dry powder, carbon dioxide. Stay away from direct water streams which may spread the liquid.
Unsuitable Extinguishing Media: Direct water jet.
Specific Hazards: Vapors can form explosive mixtures with air. Combustion may produce carbon oxides, silicon oxides, and toxic fumes.
Firefighter Instructions: Wear self-contained breathing apparatus and complete protective clothing. Prevent runoff attempts into drains or watercourses.
Additional Info: Cool containers exposed to fire with water spray to prevent rupture.
Personal Precautions: Evacuate unnecessary personnel. Use full protective suit including respirator and chemical-resistant gloves.
Environmental Precautions: Prevent entry into sewers, basements, or water systems. Notify local authorities if significant spill occurs.
Methods of Clean Up: Contain and absorb liquid with sand, earth, or inert absorbent. Collect in sealable containers for disposal. Ventilate area after cleanup.
Avoidance: Do not touch or walk directly through spilled material.
Handling: Use in well-ventilated areas. Avoid all sources of ignition. Prevent vapor accumulation. Use static discharge protection when transferring material.
Hygiene Practices: Avoid eating, drinking, or smoking in work areas. Wash hands after use.
Storage: Store in tightly closed containers in a cool, dry place away from direct sunlight and incompatible materials. Separate from oxidizers and acids.
Special Requirements: Use proper grounding/bonding practices.
Engineering Controls: Use local exhaust ventilation where vapors are likely to form. Explosion-proof mechanical systems required in confined areas.
Respiratory Protection: Wear organic vapor respirators during handling of large volumes or when ventilation is inadequate.
Skin Protection: Heavy-duty chemical-resistant gloves (nitrile, neoprene), long sleeves, and lab coats or coveralls.
Eye/Face Protection: Safety glasses with side shields or full goggles.
Occupational Limits: No specific OSHA or ACGIH limits published, but minimize exposure using industry best practices.
Appearance: Clear, colorless liquid
Odor: Faint, sweet characteristic odor
Odor Threshold: Not determined
Boiling Point: 101–103 °C
Melting Point: Less than -60 °C
Flash Point: 7 °C (closed cup)
Evaporation Rate: Not established; likely moderate
Vapor Pressure: Approximately 80 mmHg at 25 °C
Vapor Density: 5.1 (air = 1)
Solubility: Reacts with water; low solubility
Specific Gravity: 0.785 (water = 1)
Partition Coefficient (log Kow): Estimated 1.7
Auto-ignition Temperature: 210 °C
Decomposition Temperature: Not fully established
Viscosity: Thin, non-viscous liquid
Chemical Stability: Stable under recommended storage conditions; decomposes in presence of moisture or acids.
Conditions to Avoid: Heat, sparks, flames, static discharge, contact with moisture or humid air.
Incompatible Materials: Water, strong acids, strong oxidizing agents.
Hazardous Decomposition Products: Carbon monoxide, carbon dioxide, silicon dioxide, and organic vapors.
Polymerization: Will not occur under normal handling or storage.
Routes of Exposure: Inhalation, skin contact, eye contact, ingestion.
Acute Effects: Irritation to skin, eyes, and upper respiratory tract. Inhalation causes dizziness, headache, and in higher concentrations, central nervous system effects.
Chronic Effects: Repeated contact can increase skin dryness or cracking.
LD50 (Oral, Rat): Estimated over 2000 mg/kg
LD50 (Dermal, Rabbit): Not specifically measured; low acute dermal toxicity expected
Carcinogenicity: No components classified as carcinogens by IARC, NTP, or OSHA.
Sensitization: No data on skin sensitization; cases rarely observed.
Ecotoxicity: Substance is toxic to aquatic life at high concentrations based on structure and related silanes.
Persistence and Degradability: Hydrolyzes in water to release alcohols and silanols, which further degrade.
Bioaccumulation: Low potential due to rapid hydrolysis and metabolism.
Mobility in Soil: Volatile, quickly partitions to the atmosphere if released outdoors.
Other Adverse Effects: Avoid release to waterways; large spills can threaten fish and other aquatic organisms.
Product Disposal: Classified as hazardous waste; dispose in accordance with national and local regulations. Do not flush to sewer. Incinerate only in approved facilities.
Container Disposal: Containers may retain residue or vapors. Triple-rinse and puncture before recycling or disposal.
Waste Transportation: Use sealed, clearly labeled drums or totes. Coordinate with certified chemical waste haulers.
UN Number: 1993
Proper Shipping Name: Flammable Liquid, N.O.S. (contains Trimethylisopropenoxysilane)
Hazard Class: 3 (Flammable liquid)
Packing Group: II
Special Transport Precautions: Keep containers upright and secure. Protect from physical damage, temperature extremes.
Marine Pollutant: Not designated as a marine pollutant under IMDG.
Additional Labeling: Flammable liquid icon.
OSHA Status: Hazardous chemical under OSHA Hazard Communication Standard.
SARA Title III (EPCRA): Not listed as an extremely hazardous substance. Reportable under SARA 311/312 for fire and acute health hazard categories.
TSCA Status: Listed on the Toxic Substances Control Act Inventory.
EU REACH: Registration requirements applicable in European Union.
Other Listings: Subject to local worker protection regulations and chemical inventory lists internationally.
Label Requirements: GHS-compliant labeling including hazard, precautionary statements, and pictograms.
