Product Name: Iso-Butyltriethoxysilane
Chemical Family: Alkoxysilane
Chemical Formula: C10H24O3Si
Synonyms: Triethoxy(isobutyl)silane
Manufacturer: [To be specified by supplier]
CAS Number: 17980-47-1
Recommended Use: Water repellent treatment for mineral surfaces, coupling agent for plastics and rubbers, intermediate for silicone synthesis
Restrictions on Use: Industrial and professional use only, not for household applications
Emergency Phone Number: [Supplied by local distributor / manufacturer]
Classification: Flammable liquid (Category 3), Eye Irritation (Category 2A), Skin Irritation (Category 2), Specific Target Organ Toxicity - Single Exposure (Category 3)
Label Elements: Pictogram: Flame, Exclamation mark
Signal Word: Warning
Hazard Statements: Flammable liquid and vapor. Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation.
Precautionary Statements: Keep away from ignition sources like heat, sparks, open flame. Wear protective gloves, eye protection, and face shield. Use in well-ventilated areas. Avoid breathing vapors or mist.
Substance: Iso-Butyltriethoxysilane
CAS Number: 17980-47-1
Concentration: > 95% by weight
Impurities: Ethanol (<2%), traces of other alkoxysilanes
Molecular Weight: 220.39 g/mol
General Advice: Move person to fresh air. Obtain medical attention for persistent symptoms.
Inhalation: Remove to fresh air immediately. Keep at rest, monitor breathing. Seek medical help if symptoms like coughing, dizziness, or headache develop.
Skin Contact: Wash thoroughly with soap and water. Remove contaminated clothing and shoes. Seek medical attention if irritation persists.
Eye Contact: Rinse with flowing water for at least 15 minutes, lifting upper and lower eyelids. Remove contact lenses if present and easy to do. Get prompt medical attention.
Ingestion: Do not induce vomiting. Rinse mouth thoroughly. Seek immediate medical attention. Never give anything by mouth to an unconscious person.
Most Important Symptoms: Severe irritation of skin, eyes, upper respiratory tract. May lead to delayed pulmonary effects.
Suitable Extinguishing Media: Alcohol-resistant foam, dry chemical, CO2, water spray (do not use direct water jet)
Unsuitable Extinguishing Media: Direct water stream
Hazardous Combustion Products: Carbon monoxide, carbon dioxide, silicon oxides, and potentially flammable vapors
Special Protective Equipment for Firefighters: Full protective clothing, self-contained breathing apparatus
Special Firefighting Procedures: Cool containers exposed to flames with water spray. Prevent runoff from firefighting from entering drains or water courses.
Explosion Hazard: Vapors may form explosive mixtures with air; move containers from fire area if possible.
Personal Precautions: Evacuate unnecessary personnel. Avoid breathing vapors, provide adequate ventilation.
Protective Equipment: Chemical-resistant gloves, safety goggles, chemical apron, positive-pressure respirator if exposure risk is high.
Emergency Procedures: Remove sources of ignition, use nonsparking tools. Prevent entry into drains, basements, or confined areas.
Spill Cleanup Methods: Absorb with inert material (sand, earth, vermiculite), place in chemical waste container. Use explosion-proof equipment.
Environmental Precautions: Avoid discharge to soil, surface waters, or sewer system.
Advice on Safe Handling: Use only with adequate ventilation. Avoid contact with skin, eyes, and clothing. Avoid inhaling vapors or mist. Take measures to prevent static discharge.
Hygiene Measures: Wash hands after handling. Do not eat, drink, or smoke while using.
Storage Conditions: Store in original container tightly closed in a well-ventilated, fire-proof area. Store away from sources of ignition, heat, direct sunlight.
Incompatible Materials: Water, strong acids, strong bases, oxidizing agents. Product reacts exothermically with water.
Specific use(s): Keep containers tightly sealed.
Occupational Exposure Limits: No UK / US OSHA exposure limits specified for main compound; observe local limits for ethanol byproduct.
Engineering Controls: Provide local exhaust ventilation to control airborne levels. Emergency eyewash stations and safety showers required.
Respiratory Protection: Use NIOSH-approved respirator for organic vapors if exposure likely to exceed recommended limits.
Hand Protection: Chemical-resistant gloves (nitrile, butyl rubber)
Eye Protection: Tight-fitting safety goggles and face shield
Skin Protection: Protective clothing impervious to chemicals, including long sleeves and aprons.
Environmental Exposure Controls: Prevent product from entering drains, surface waters, or ground water.
Appearance: Clear, colorless to slightly yellowish liquid
Odor: Slight alcoholic odor
Odor Threshold: Not established
pH: Not applicable (hydrolyzes in water)
Melting Point / Freezing Point: Below -70°C
Boiling Point / Range: 165 – 170°C at 101.3 kPa
Flash Point: About 47°C (Closed cup)
Evaporation Rate: Not established
Flammability: Flammable liquid
Upper / Lower Flammability Limits: 0.6 vol% (lower), 8.6 vol% (upper) estimated
Vapor Pressure: 2.7 hPa at 20°C
Vapor Density: Heavier than air (est.)
Relative Density: 0.88 - 0.90 (water = 1) at 20°C
Solubility in Water: Reacts slowly with water; forming alcohols and silanols
Partition coefficient (n-octanol/water): log Kow 3.5 (estimated)
Auto-ignition Temperature: 240°C (estimated)
Decomposition Temperature: Not determined
Viscosity: 1.2 cSt at 25°C
Chemical Stability: Stable under recommended storage conditions.
Reactivity: Exothermic reaction with water or moisture producing ethanol
Conditions to Avoid: Heat, flame, sparks, contact with water or moisture
Incompatible Materials: Water, strong oxidizers, strong acids, strong bases
Hazardous Polymerization: Will not occur under normal conditions
Hazardous Decomposition Products: Carbon monoxide, carbon dioxide, silicon dioxide, ethanol fumes
Other Hazards: Vapor buildup in confined areas can form flammable mixtures with air; containers exposed to heat may burst.
Acute Toxicity: Oral LD50 (rat): >2000 mg/kg
Inhalation: May cause irritation to upper respiratory system, coughing, dizziness
Dermal: Skin irritation, possible dermatitis on prolonged exposure
Eye: Severe irritation, redness, tearing
Chronic Effects: No data to indicate carcinogenic, mutagenic, or reproductive hazards
Sensitization: Not expected to cause skin sensitization based on structure
Target Organs: Eyes, skin, respiratory system
Routes of Exposure: Skin, eyes, inhalation
Other Symptoms: Delayed lung effects possible if inhaled in large quantities
Ecotoxicity: Not classified as hazardous to aquatic life, but hydrolysis products (ethanol, silanols) have local environmental impact
Aquatic Toxicity: Fish (LC50, 96 hr): >100 mg/L (estimated for parent compound)
Degradability: Hydrolyzes in water to ethanol and siloxanols, which further degrade to insoluble silica
Bioaccumulative Potential: Low to moderate (due to log Kow of 3.5)
Mobility in Soil: Rapid hydrolysis forms non-volatile byproducts
PBT/vPvB Assessment: Not persistent, not bioaccumulative, not toxic (according to current criteria)
Other Information: Do not release to the environment or watercourses uncontrolled.
Waste Disposal Methods: Incinerate in a chemical incinerator equipped with afterburner and scrubber. Dispose of waste material in accordance with local, regional, and national regulations.
Product Disposal: Do not discharge to public sewer or waterway. Recover and reuse material if possible.
Container Disposal: Rinse empty containers with an appropriate solvent, then remove to hazardous waste facility.
Special Precautions: Prevent residual contamination of soil or groundwater. Do not dispose in general landfill.
Waste Codes: Assign according to local disposal regulations.
UN Number: UN1993
Proper Shipping Name: Flammable Liquid, n.o.s. (contains Iso-Butyltriethoxysilane)
Transport Hazard Class: 3 (Flammable liquid)
Packing Group: III
Labels: Flammable liquid
Special Precautions for User: Handle as a flammable, adjust ventilation for vapor, protect from physical damage
Environmental Hazards: Not a marine pollutant
Transport in Bulk: Follow instructions for IBC code
Emergency Response Guide Number: 128
TSCA (US): Listed on Toxic Substances Control Act Inventory
EINECS/ELINCS (EU): Listed
REACH Registration Number: [Contact Supplier]
SARA Title III Sections 302, 304, 313: Not subject to reporting requirements
California Prop. 65: This chemical is not known to be listed
International Inventories: Listed on DSL (Canada), AICS (Australia), ENCS (Japan), KECI (Korea), PICCS (Philippines), NZIoC (New Zealand)
VOC Content: Contains volatile organic compounds
Hazard Symbols: Flammable, Irritant according to GHS
Workplace Labeling: Product label must include hazard pictograms and signal words required by GHS and local law
Other Regulations: Observe workplace safety standards as per OSHA, EU Directives, and other local regulations.
