Product Name: Ethyl Orthosilicate Polymer
Chemical Name: Tetraethyl Orthosilicate Polymer
Synonyms: TEOS Polymer, Silicon Tetraethoxide Polymer
CAS Number: 78-10-4
Recommended Use: Coatings, Binders for Inorganic Materials, Crosslinking Agent
Manufacturer: Contact supplier or local distributor for detailed information
Contact Information: Emergency phone number available from supplier or transportation service
Product Code: Refer to invoice or bulk container ID
Email/Website: Available through the manufacturer
Classification: Flammable Liquid, Eye Irritant Category 2A, Skin Irritant Category 2, Specific Target Organ Toxicity – Single Exposure
Signal Word: Danger
Hazard Statements: Causes skin and eye irritation, harmful if inhaled, may cause respiratory irritation, flammable liquid and vapor, prolonged exposure may lead to organ damage
Pictograms: Flame, Exclamation mark, Health hazard symbol
Precautionary Statements: Keep away from heat and open flames, avoid breathing vapors, use only outdoors or in well-ventilated area, wear appropriate protective equipment, in case of exposure or feeling unwell, seek medical advice
Chemical Name: Ethyl Orthosilicate Polymer
Formula: Si(OC2H5)4 (Polymerized form)
CAS Registry Number: 78-10-4
Content: > 95% by weight (polymerized silicate), residual monomer < 5%
Impurities: Ethanol (may be released upon hydrolysis), secondary polymeric silicate by-products
Stabilizers or Additives: Not typically present
Inhalation: Remove victim from area of exposure immediately, bring to fresh air, keep at rest, support breathing as needed, seek medical attention for breathing difficulty or irritation
Skin Contact: Remove contaminated clothing and shoes, wash affected skin with mild soap and water for at least 15 minutes, do not apply solvents, consult a physician for persistent irritation or burns
Eye Contact: Rinse eyes cautiously with water for 15–20 minutes, ensure eyelids are held open, remove contact lenses if possible, continue flushing, call for urgent medical care if irritation persists
Ingestion: Do not induce vomiting, rinse mouth thoroughly with water, keep person calm, drink 1–2 glasses of water if conscious, seek immediate medical help, never provide anything by mouth to an unconscious person
Important Symptoms: Burning sensation, coughing, tearing, redness, headache, dizziness, nausea, in severe cases pulmonary complications or central nervous system depression
Advice for Medical Professionals: Symptomatic and supportive care, monitor for respiratory depression, ensure airway management
Suitable Extinguishing Media: Alcohol-resistant foam, dry chemical, carbon dioxide, water spray used only to cool containers
Unsuitable Media: Direct water jet may spread fire
Specific Hazards: Highly flammable liquid and vapor, may form explosive mixtures with air, combustion will release silicon oxides, carbon monoxide, carbon dioxide
Fire Fighting Procedures: Evacuate area, fight fire from a safe distance, use self-contained breathing apparatus and full protective gear
Special Protective Equipment: Chemical resistant suit, positive-pressure breathing apparatus
Advice: Prevent run-off to drains and waterways, containers exposed to flames may rupture
Personal Precautions: Avoid contact with skin and eyes, remove ignition sources, evacuate nonessential personnel, ventilate area
Protective Equipment: Chemical resistant gloves, splash goggles, suitable respirator or mask for vapor protection, coveralls
Spill Cleanup Methods: Absorb with inert material such as sand or earth, place in chemical waste container, wash area with soap and water, avoid contaminating water sources
Environmental Precautions: Prevent further leakage or spillage, avoid entry into surface water, drains or soil
Decontamination: Ventilate and wash area after removal, dispose of contaminated waste in compliance with regulations
Handling Guidelines: Handle only in well-ventilated locations, ground and bond containers during transfer, use spark-proof tools and explosion-proof equipment, avoid breathing fumes or vapor, keep container tightly closed when not using
Safe Storage Conditions: Store in a cool, dry, and well-ventilated area, keep away from incompatible substances such as moisture, acids, alkalis, and oxidizers, store only in original or approved containers, protect from static discharge
Prohibited Practices: Do not store with food, drink, or animal feed, avoid storing in direct sunlight or near heat sources
Specific Storage Requirements: Keep container upright and securely sealed, maintain dry conditions to prevent hydrolysis and ethanol release
Occupational Exposure Limits: ACGIH TLV for Tetraethyl Orthosilicate: 0.5 ppm (3.8 mg/m³) as a short-term exposure limit (check local and national regulations)
Engineering Controls: Local exhaust ventilation or general dilution ventilation, explosion proof ventilation required for higher concentrations
Personal Protective Equipment: Impervious gloves (nitrile, neoprene), chemical safety goggles with face shield, flame-resistant lab coat or apron, closed-toe shoes, suitable respirator if exposure limits are exceeded
Hygiene Measures: Wash hands after using, avoid touching face with contaminated gloves, remove and wash contaminated clothing after use
Environmental Exposure Controls: Collect and containerize waste materials, implement measures to avoid emissions to air, water, soil
Appearance: Clear to slightly hazy colorless liquid (may become viscous upon polymerization)
Odor: Characteristic ethanol-like smell
Odor Threshold: Not established
pH: Not applicable (neutral in pure form, reacts with water)
Melting/Freezing Point: Below -80°C
Boiling Point/Range: 168–170°C (may vary with polymerization)
Flash Point: 46°C (closed cup)
Evaporation Rate: Moderate
Flammability: Flammable liquid, may form explosive vapor-air mixtures
Vapor Pressure: Roughly 4 mmHg at 20°C
Vapor Density: 7.7 (air = 1)
Specific Gravity: 0.93 at 20°C
Solubility: Decomposes in water, soluble in alcohols and organic solvents
Partition Coefficient (n-octanol/water): 1.6 estimated
Auto-ignition Temperature: 215°C
Decomposition Temperature: Above 210°C
Viscosity: Increases with polymerization
Other Data: Product emits ethanol if it hydrolyzes
Chemical Stability: Stable under dry, cool, inert conditions; reacts vigorously with water, acids, alkalis
Conditions To Avoid: Moisture, water, humidity, heat, sources of ignition, strong acids and bases
Incompatible Materials: Water, alcohols, strong oxidizers, strong acids, strong alkalis, amines
Hazardous Decomposition Products: Silicon dioxide, ethanol, carbon oxides, traces of formaldehyde or other organics at high temperature
Polymerization: Not expected under recommended storage, may occur with secondary exposure to moisture
Likely Routes of Exposure: Inhalation, skin contact, eye contact, ingestion
Acute Toxicity: Oral LD50 (rat) ~6270 mg/kg; Dermal LD50 (rabbit) >2000 mg/kg; Inhalation LC50 (rat, 4h) >16.8 mg/L
Skin Corrosion/Irritation: Causes irritation, redness, and drying with repeated contact
Serious Eye Damage/Irritation: Causes severe eye irritation and possible damage
Inhalation Effects: May cause dizziness, headache, respiratory irritation, high concentrations may lead to central nervous system effects
Sensitization: Not classified as a sensitizer
Chronic Effects: Potential for organ damage after prolonged exposure, no confirmed carcinogenicity in humans
Additional Information: Hydrolysis of the polymer generates ethanol, which has known toxicity risks especially with chronic exposure
Aquatic Toxicity: Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment
Persistence and Degradability: Hydrolyzes rapidly to silicon dioxide and ethanol, ethanol is biodegradable, silica is persistent
Bioaccumulative Potential: Low for hydrolysis by-product (silica), moderate for ethanol
Mobility in Soil: Hydrolysis products mobile in wet environments, limited movement of silica in soil
Other Adverse Effects: Polymer may change aquatic ecosystem balance if released in bulk, hazardous to plants and microorganisms at high concentrations
Preventative Measures: Prevent entry into waterways, sewers, and soil, contain spills and leaks, collect waste for approved disposal
Disposal Methods: Incinerate according to local, state, and federal regulations, do not dispose via municipal drains or regular landfill
Contaminated Packaging: Rinse empty containers with compatible solvent, treat rinse as hazardous, crush or puncture containers, dispose as hazardous waste
Special Precautions: Ensure waste contractor has appropriate licenses, do not mix with incompatible materials, do not discharge to surface water or soil
Physical/chemical characteristics: Fully hydrolyzed or reacted product may be non-hazardous; consult waste classification for specific guidelines
UN Number: 1292
UN Proper Shipping Name: Tetraethyl Silicate
Transport Hazard Class: 3 (Flammable Liquid)
Packing Group: III
Labels Required: Flammable liquid
Environmental Hazards: Not classified as marine pollutant but spills must be avoided
Special Transport Precautions: Secure upright containers, avoid impact, segregate from oxidizers and incompatible chemicals, carry documentation stating hazard information
Additional Transport Information: Must comply with regional and international transport regulations (IMDG, IATA, DOT, ADR)
TSCA (US): Listed
DSL (Canada): Listed
REACH (EU): Registered (consult up-to-date ECHA database)
OSHA (US): Hazardous by definition of Hazard Communication Standard
SARA Title III: Immediate (acute), fire hazard
CERCLA: Not classified as a hazardous substance
California Prop 65: Not listed
Other National or Local Regulations: Observe specific requirements for use and disposal in your jurisdiction; all users must comply with workplace safety legislation, transport codes, and chemical safety standards
