Product Name: Tetrapropoxysilane
Synonyms: TPOS, Tetra-n-propoxysilane
Chemical Formula: Si(OC3H7)4
Chemical Family: Organosilicon compound
Recommended Use: Intermediate for synthesis, crosslinker in silicone materials
Manufacturer: Commercial chemical supply companies
Emergency Contact: Refer to local distributor's emergency number
CAS Number: 682-01-9
Classification: Flammable liquid (Category 3), Skin irritation (Category 2), Eye irritation (Category 2A)
Signal Word: Warning
Hazard Statements: Flammable liquid and vapor; Causes skin irritation; Causes serious eye irritation
Pictograms: Flame, Exclamation mark
Routes of Exposure: Inhalation, skin contact, eye contact, ingestion
Precautionary Statements: Keep away from heat/sparks/open flames; Wear protective gloves; Avoid breathing vapors; Wash exposed skin after handling
Chemical Name: Tetrapropoxysilane
Common Name: TPOS
Purity: Greater than 98%
Impurities: Minor byproducts of hydrolysis, trace alcohols
Molecular Weight: 296.5 g/mol
Inhalation: Remove victim to fresh air, keep at rest, seek medical attention if symptoms persist
Skin Contact: Immediately wash with plenty of water, remove contaminated clothing, obtain medical care if irritation remains
Eye Contact: Flush eyes for at least 15 minutes, lift eyelids occasionally, contact medical help without delay
Ingestion: Rinse mouth with water, do not induce vomiting, get medical help quickly
Symptoms and Effects: Skin redness, dryness, burning sensation in eyes, headache and dizziness from vapor inhalation
Notes for Physicians: Symptomatic treatment, immediate decontamination especially for eyes and skin exposure
Suitable Extinguishing Media: Carbon dioxide, dry powder, alcohol-resistant foam
Unsuitable Extinguishing Media: Water jet (may spread fire)
Special Protective Equipment: Self-contained breathing apparatus, full protective suit
Hazardous Combustion Products: Carbon oxides, silicon oxides, irritating organic vapors
Specific Hazards: Vapors may form explosive mixtures with air; containers may rupture in fire
Advice for Firefighters: Cool down containers near fire with water spray; keep away from ignition sources
Personal Precautions: Evacuate unnecessary personnel, ventilate area, avoid breathing vapors
Protective Equipment: Chemical-resistant gloves, eye/face protection, protective clothing
Environmental Precautions: Prevent run-off to drains, surface water, and soil
Spill Cleanup Methods: Absorb onto inert material (sand, earth), collect in labeled containers, seal securely
Disposal: Follow regulatory guidelines for hazardous waste; do not flush with water
Handling: Use only with adequate ventilation, avoid contact with eyes and skin, keep away from open flames or hot surfaces, ground containers when transferring
Storage: Store in cool, well-ventilated space, keep container tightly closed, keep away from heat sources and direct sunlight, segregate from oxidizing materials
Special Measures: Employ explosion-proof equipment, check regularly for leaks, always keep away from sources of moisture
Engineering Controls: Local exhaust ventilation to minimize vapor concentrations
Eye Protection: Chemical splash goggles or face shield
Skin Protection: Nitrile or neoprene gloves, lab coat, chemical-resistant apron
Respiratory Protection: Approved respirator for organic vapors if exposure limits exceeded
Hygiene: Wash hands thoroughly after handling, remove contaminated clothing
Exposure Limits: No specific limits established, minimize exposure by observing good practices
Appearance: Clear, colorless to pale yellow liquid
Odor: Ether-like
Odor Threshold: Low, specific data not available
pH: Not applicable
Melting Point: Less than -50°C
Boiling Point: 238°C
Flash Point: 55°C (closed cup)
Evaporation Rate: Slower than water
Flammability: Flammable liquid
Upper/Lower Flammability Limits: Not precisely established
Vapor Pressure: Low at 20°C
Vapor Density: Heavier than air
Specific Gravity: 0.94 at 20°C
Solubility: Reacts slowly with water, miscible with organic solvents
Chemical Stability: Stable under recommended conditions
Reactivity: May react with moist air or water producing propanol and silanols
Hazardous Reactions: Generates heat with acids, bases, or moist conditions; risk of flammable vapor release
Conditions to Avoid: Moisture, open flame, high temperatures
Incompatible Materials: Strong acids, alkalis, oxidizers, water
Hazardous Decomposition Products: Silicon dioxide, carbon dioxide, carbon monoxide, propanol
Acute Toxicity: Oral LD50 (rat) > 5000 mg/kg; low to moderate acute toxicity
Skin Corrosion/Irritation: Causes irritation on prolonged or repeated contact
Serious Eye Damage/Irritation: Serious irritation possible
Respiratory or Skin Sensitization: Not expected to cause sensitization under normal conditions
Chronic Effects: No known chronic health effects from limited exposure
Carcinogenicity: Not classified as carcinogenic
Mutagenicity: No evidence from current data
Other Routes: Vapors may cause headache, nausea, dizziness
Aquatic Toxicity: Limited data suggests low to moderate acute toxicity to aquatic organisms
Persistence and Degradability: Hydrolyzes in water and soil, forming propanol and silanols, which degrade further
Bioaccumulative Potential: Low expected for hydrolysis products
Mobility in Soil: Moderate, hydrolysis slows migration
Other Adverse Effects: High concentrations may impact microbial activity in soil and water temporarily
Waste Treatment Methods: Incinerate in approved facility or dispose according to local hazardous waste regulations
Contaminated Packaging: Clean before reuse or dispose as hazardous waste
Do Not: Pour to drain, storm water, or open soil
Precautions: Wear gloves and goggles during disposal work
Disposal Code: Consult local, regional, and national authorities for appropriate codes
UN Number: 1993
UN Proper Shipping Name: Flammable liquid, n.o.s. (Tetrapropoxysilane)
Transport Hazard Class: 3 (Flammable liquid)
Packing Group: III
Environmental Hazards: Not classified as a marine pollutant
Special Precautions: Avoid impact and temperature extremes during transport; secure containers
Inventory Listings: Listed in US TSCA, EU REACH, Canada DSL, Australia AICS
Labelling: Complies with GHS labeling for flammable and irritant chemicals
SARA Title III (USA): Not subject to reporting
California Proposition 65: Not listed
Other Regulation: Observe applicable workplace safety rules and chemical hygiene regulations
