Chemical Name: Vinyltrichlorosilane
Synonyms: Trichloro(ethenyl)silane, Vinyl Silicon Trichloride
CAS Number: 75-94-5
Molecular Formula: C2H3Cl3Si
Manufacturer: Commonly produced by industrial chemical suppliers
Recommended Use: Used across polymer, adhesive, and coating manufacturing
Emergency Contact: Refer to local emergency response authorities and supplier
Classification: Flammable liquids (Category 3); Acute Toxicity, Oral (Category 3); Acute Toxicity, Inhalation (Category 3); Skin Corrosion/Irritation (Category 1B); Serious Eye Damage (Category 1)
Signal Word: Danger
Hazard Statements: Toxic if swallowed or inhaled. Causes severe skin burns and eye damage. May cause respiratory irritation. Flammable liquid and vapor.
Pictograms: Flame, Corrosion, Skull & Crossbones, Exclamation mark
Precautionary Statements: Avoid breathing mist, vapor, or spray. Keep away from heat or sparks. Use only outdoors or in well-ventilated areas. Wear protective gloves, clothing, eye protection, face protection. Wash thoroughly after handling. Keep container tightly closed.
Substance: Vinyltrichlorosilane
Chemical Formula: C2H3Cl3Si
Concentration: 98-100%
Impurities: May contain trace levels of hydrochloric acid and organochlorosilane byproducts as process impurities
Inhalation: Remove individual to fresh air immediately. If breathing is difficult, administer oxygen. Seek emergency medical attention.
Skin Contact: Remove contaminated clothing. Rinse skin immediately with plenty of water for at least 15 minutes. Get prompt medical help.
Eye Contact: Flush eyes with water for at least 15 minutes, lifting upper and lower lids occasionally. Get immediate medical assistance; eye damage may occur.
Ingestion: Do not induce vomiting. Rinse mouth with water. Never give anything by mouth to an unconscious person. Get medical attention urgently.
Acute Symptoms: Severe burns, respiratory tract irritation, possible pulmonary edema, corneal injury
Suitable Extinguishing Media: Dry chemical, carbon dioxide, foam
Unsuitable Media: Do not use water directly on fire; may cause violent reaction and release of hydrochloric acid fumes
Hazards from Combustion: Produces toxic gases including phosgene, hydrogen chloride, silicon oxides on burning
Protective Equipment for Firefighters: Recommend full turnout gear and self-contained breathing apparatus
Firefighting Instructions: Isolate area, approach from upwind, use water spray to cool containers, prevent run-off into sewers or waterways
Personal Precautions: Wear acid-resistant gloves, chemical splash goggles, and an approved respirator
Environmental Precautions: Prevent spill from entering drains, sewers, or waterways. Alert authorities if contamination occurs.
Cleanup Methods: Evacuate area and ventilate. Contain spill with inert absorbent (dry sand, earth). Transfer to properly labeled containers for disposal. Neutralize residues with dilute aqueous solution of soda ash (sodium carbonate). Wash spill site after material pickup is complete.
Disposal: Treat contaminated materials as hazardous waste. Dispose according to federal/state/local regulations.
Safe Handling: Use only in well-ventilated areas. Avoid all personal contact. Never breathe vapors or fumes. Keep away from flames, heat, and sources of ignition. Use spark-proof equipment and proper bonding/grounding when transferring material.
Storage Conditions: Store tightly sealed in corrosion-resistant containers under dry, inert atmosphere (nitrogen or argon recommended). Keep away from water and moisture sources.
Incompatible Materials: Water, alcohols, bases, strong oxidizers, and many metals
Handling Precautions: Regularly inspect containers for leaks, corrosion, or damage. Do not return unused material to original container.
Exposure Limits: No established OSHA PEL or ACGIH TLV for vinyltrichlorosilane; treat as hazardous
Engineering Controls: Use chemical fume hood or local exhaust systems to minimize exposure
Personal Protective Equipment: Wear chemical-resistant gloves (butyl rubber or neoprene), splash goggles, faceshield. Use acid-resistant lab coat or apron. In case of inadequate ventilation, wear a NIOSH/MSHA-approved respiratory protection.
Hygiene Measures: Wash hands before breaks, after handling, and at the end of shift. Remove contaminated clothing and wash thoroughly before reuse.
Appearance: Clear, colorless liquid
Odor: Sharp, acrid, irritating to mucous membranes
Boiling Point: 91–92°C
Melting Point: −86°C
Flash Point: 16°C (closed cup)
Autoignition Temperature: 260°C
Vapor Pressure: 129 mmHg at 20°C
Relative Density: 1.17
Solubility: Reacts violently with water; decomposes to hydrochloric acid and siloxane polymers
Partition Coefficient (log Kow): not available
Viscosity: Low (liquid at room temperature)
Chemical Stability: Stable in tightly sealed containers under dry inert gas
Conditions to Avoid: Moisture, water, high temperatures, open flames, sources of ignition
Incompatible Materials: Water, alcohols, strong bases, oxidizers, metals such as aluminum, zinc
Hazardous Decomposition Products: Hydrogen chloride, siloxanes, phosgene, silicon oxides
Polymerization: May occur on contact with water, releasing heat and toxic gases
Routes of Exposure: Inhalation, ingestion, skin/eye contact
Acute Toxicity: LD50 oral (rat): 340 mg/kg; LD50 dermal (rabbit): data not available; LC50 inhalation (rat, 4h): 290 ppm
Symptoms: Burning sensation, laryngeal spasm, pulmonary edema, cough, shortness of breath, severe skin burns, and eye damage
Chronic Effects: Prolonged or repeated exposure may cause permanent eye injury, skin scarring, lung damage
Carcinogenicity: Not classified as a carcinogen by IARC, NTP, OSHA
Other Information: No known reproductive, mutagenic, or teratogenic effects based on available data
Ecotoxicity: Harmful to aquatic organisms by acidification and toxicity
Aquatic Toxicity: Data on fish, daphnia, or algae not fully established but expected to be toxic due to rapid hydrolysis and generation of hydrochloric acid
Persistence and Degradability: Reacts quickly with water, forming nonvolatile products
Mobility in Soil: Decomposes to immobile siloxanes and soluble chloride ions
Bioaccumulation: Not anticipated appreciably due to hydrolysis. Significant effects expected are local, not systemic.
Other Harmful Effects: Acidification of soil and water due to hydrochloric acid release
Waste Treatment: Treat hazardous waste by controlled hydrolysis, collection of acid, and neutralization
Disposal Method: Dispose in accordance with local, regional, and national regulations
Container Disposal: Triple rinse containers, neutralize residues, then puncture and recycle or dispose of as regulated hazardous waste
Precautions: Prevent uncontrolled emissions. Incinerate hydrolyzed, neutralized wastes in approved facility. Avoid landfill unless treated and solidified.
UN Number: UN 1304
Proper Shipping Name: Vinyltrichlorosilane
Transport Hazards Class: 3 (flammable liquid), 8 (corrosive)
Packing Group: I (high danger)
Labels Required: Flammable liquid, corrosive
Special Precautions: Keep segregated from food and feed. Avoid transport with incompatible substances (water, oxidizers).
DOT, IATA, IMDG Regulations: Subject to stringent transport controls as a flammable and corrosive material
OSHA Status: Considered hazardous, covered under Hazard Communication Standard
TSCA Inventory: Listed
SARA Title III: Covered under acute health hazard
RCRA Status: Classified as U-series hazardous waste (U238)
CERCLA Reportable Quantity: 10 lbs (as hydrochloric acid generated by hydrolysis)
State Listings: Subject to right-to-know requirements in several US states
Global Inventory: Generally listed on global chemical inventories, but users must verify current status with supplier
Workplace Controls: May be subject to additional regulations depending on locale and application; consult environmental, health, and safety authorities for up-to-date compliance needs
