© 2026 Sinochem Nanjing Corporation,
All Right Reserved
Product Name: Silicon Tetrachloride
Chemical Formula: SiCl4
Synonyms: Tetrachlorosilane
CAS Number: 10026-04-7
Recommended Use: Manufacturing of optical fibers, semiconductors, and as a chemical intermediate
Supplier: Refer to purchasing documents for supplier contact details
Emergency Phone: Local emergency numbers or poison control center information provided on shipping documents
Classification: Corrosive to skin, serious eye damage, toxic if inhaled
Signal Word: Danger
Hazard Pictograms: Corrosion, health hazard
Main Risks: Causes severe skin burns and eye damage, acute respiratory irritation, produces hydrogen chloride gas on contact with water or moisture
Routes of Exposure: Inhalation, skin contact, eye contact
GHS Hazards: H314: Causes severe skin burns and eye damage; H331: Toxic if inhaled; H335: May cause respiratory irritation
Precautionary Statements: Wear protective gloves and eye protection, avoid breathing vapors or mist, do not get in eyes, on skin, or on clothing, use only outdoors or in well-ventilated area
Chemical Name: Silicon Tetrachloride
Purity: Typically over 99% by weight
Impurities: May contain trace amounts of hydrogen chloride, chlorinated silanes, or other chlorinated by-products
CAS Number: 10026-04-7
Inhalation: Remove individual to fresh air immediately, keep at rest in a position comfortable for breathing, provide oxygen or artificial respiration if breathing is difficult, seek emergency medical attention
Skin Contact: Immediately flush with plenty of water for at least 15 minutes while removing contaminated clothing, do not neutralize on skin, seek medical attention promptly
Eye Contact: Rinse cautiously with water for several minutes, remove contact lenses if present and easy to do, continue rinsing, seek urgent medical attention
Ingestion: Rinse mouth with water, do not induce vomiting, seek immediate medical attention
Symptoms: Burning sensation, cough, difficulty breathing, redness or blistering of skin, severe eye pain, vision impairment
Suitable Extinguishing Media: Use dry sand, dry powder, or carbon dioxide for small fires, do not use water or foam on product spill
Special Hazards: Decomposes in fire to release toxic and corrosive hydrogen chloride gas, contact with water liberates heat and hydrochloric acid fumes
Protective Equipment: Firefighters need full protective clothing and self-contained breathing apparatus
Firefighting Instructions: Evacuate area, approach fire from upwind, keep containers cool with non-direct water spray if safe to do so, avoid runoff into sewers
Personal Precautions: Isolate hazard area, ventilate area, use appropriate PPE including chemical-resistant gloves and safety goggles or face shield, avoid inhalation or contact
Environmental Precautions: Prevent material from entering drains, sewers, or water courses, inform authorities in case of large releases
Cleanup Methods: Use inert absorbent materials such as dry sand or earth, shovel into suitable labeled containers for disposal, ventilate area, do not use water directly on spilled material
Decontamination: After removal, dilute residue cautiously with copious water and neutralize with sodium bicarbonate solution if safe
Handling: Handle only in properly designed and forced ventilated chemical fume hoods, avoid contact with water, moisture, and oxidizing substances, take steps to prevent static discharge or accidental contact, use non-sparking tools and grounded equipment
Storage Conditions: Store in tightly closed corrosion-resistant containers, keep in cool, dry, well-ventilated area away from incompatible materials such as water, alkalis, strong bases, and oxidizers
Incompatibilities: Avoid contact with water, hydroxides, amines, strong acids, and metals susceptible to corrosion
Additional Precautions: Segregate from food and feedstuffs, ensure access to emergency showers and eyewash stations nearby
Occupational Exposure Limits: OSHA PEL and ACGIH TLV for hydrogen chloride as guidance, typically ceiling value 5 ppm (7 mg/m3), no specific established value for SiCl4 itself
Engineering Controls: Strong exhaust ventilation system, local mechanical ventilation, gas detection systems
Respiratory Protection: Wear full-face air-purifying respirator with acid gas cartridge, or supplied-air respirator for high concentrations
Eye Protection: Use chemical splash goggles, face shield
Skin Protection: Chemical-resistant clothing, impervious gloves such as neoprene or nitrile rubber
Hygiene: Do not eat, drink, or smoke during use; wash hands thoroughly after handling; remove contaminated clothing immediately
Appearance: Colorless to pale yellow fuming liquid
Odor: Pungent, suffocating
pH: Not applicable
Boiling Point: About 57.6°C (135.7°F)
Melting Point: -70°C (-94°F)
Vapor Pressure: 76 mm Hg at 20°C
Vapor Density: 5.8 (air = 1)
Solubility: Reacts violently with water
Density: 1.48 g/cm3 at 20°C
Partition Coefficient: Not applicable (reacts with water)
Evaporation Rate: Data not available due to reactivity with air humidity
Flash Point: Nonflammable
Chemical Stability: Stable in airtight containers under dry, inert atmosphere
Conditions to Avoid: Exposure to moisture or water, sources of ignition, high temperatures
Materials to Avoid: Water, alcohols, amines, strong bases, strong oxidizers, finely divided metals
Hazardous Decomposition Products: Hydrogen chloride gas, silicon dioxide, chlorine gas under extreme conditions
Polymerization: Will not polymerize
Routes of Exposure: Inhalation, skin and eye contact
Acute Toxicity: LC50 (inhalation, rat): 430 ppm (1 hour), high toxicity by inhalation
Skin Corrosion: Severe burns, ulceration, necrosis
Eye Damage: Permanent eye injury possible, blindness
Respiratory Sensitization: Severe irritation, risk of delayed pulmonary edema
Chronic Effects: Prolonged exposure can lead to chronic bronchitis, respiratory impairment, and dermatitis
Carcinogenicity: Not classified as carcinogen by IARC or NTP
Target Organ Effects: Skin, eyes, respiratory tract
Ecotoxicity: Releases of silicon tetrachloride to water create hydrochloric acid and silica, which may lower pH and have harmful effects on aquatic life
Aquatic Toxicity: Low persistence due to rapid hydrolysis; local effects from acidification can harm aquatic organisms
Mobility: Hydrolyzes quickly in presence of moisture, products not persistent in environment
Bioaccumulation: Not expected
Persistence and Degradability: Silicon dioxide and chloride ions are end-products, do not degrade further in environment
Product Disposal: Must be neutralized carefully by trained personnel, add to large volume of water under controlled conditions with ventilation, resulting waste compliant with local regulations
Contaminated Materials: Dispose of as hazardous waste, do not reuse empty containers, ensure containers are triple rinsed and vented
Legal Compliance: Adhere to all local, regional, and national waste management regulations relating to hazardous chemicals
UN Number: UN1818
Proper Shipping Name: Silicon Tetrachloride
Transport Hazard Class: 8 (Corrosive substance)
Packing Group: I (High danger)
Label Required: Corrosive
Marine Pollutant: No
Special Precautions: Ship in tightly sealed and labelled containers, avoid contact with water during transport, comply with international and national freight regulations for corrosive goods
OSHA: Classified as hazardous chemical; subject to Hazard Communication Standard
EPA: Regulated as extremely hazardous substance under EPCRA Section 302 (threshold planning quantity: 100 pounds)
TSCA: Listed on the Toxic Substances Control Act Inventory
SARA: Requires reporting for releases or storage beyond threshold quantities
International Inventories: Listed on EINECS/ELINCS (Europe), DSL (Canada), AICS (Australia), ENCS (Japan)
Additional Regulations: Local waste, storage, and use regulations apply; employee safety training required
Emergency Planning: Facilities storing significant quantities must notify local emergency response authorities and maintain site-specific emergency plans
