Product Name: 3-(Methoxypolyoxyethylene)Trimethoxysilane
Chemical Family: Organosilane
Chemical Formula: C9H24O6Si
Synonyms: Polyethylene glycol mono(trimethoxysilyl)propyl ether
CAS Number: 134180-76-0
Recommended Use: Adhesion promoter, surface modifier, coupling agent
Supplier Details: Manufacturer or distributor information available on package and invoice
Emergency Contact: National or local poison control center; supplier emergency phone number available on label
Classification: Flammable liquid, Skin irritant, Eye irritant
Signal Word: Warning
Hazard Statements: Causes skin and eye irritation, may cause respiratory irritation, flammable liquid and vapor
Pictograms: Flame, exclamation mark
Precautionary Statements: Keep away from heat/sparks/open flames. Use only in a well-ventilated area. Avoid contact with eyes, skin, and clothing. Wear suitable protective equipment. In case of fire, use alcohol-resistant foam, dry chemical, or carbon dioxide.
Potential Health Effects: Inhalation can cause irritation and drowsiness. Skin contact can lead to dryness or cracking. Eyes may burn or water after exposure.
Chemical Name: 3-(Methoxypolyoxyethylene)Trimethoxysilane
CAS Number: 134180-76-0
Concentration: >90%
Other Ingredients: Possible trace stabilizers or byproducts below reporting thresholds
Inhalation: Remove exposed person to fresh air. Give oxygen or artificial respiration if breathing has stopped. Contact medical service if symptoms persist.
Skin Contact: Wash area immediately with soap and water, remove contaminated clothing. Seek medical attention for irritation or allergic reaction.
Eye Contact: Rinse eyes cautiously with water for at least 15 minutes, lifting eyelids. Remove contact lenses if present and easy to do.
Ingestion: Rinse mouth thoroughly, drink water. Avoid inducing vomiting unless directed by a medical professional. Seek medical advice for discomfort or if large quantity is swallowed.
Suitable Extinguishing Media: Use alcohol-resistant foam, dry chemical powder, or carbon dioxide.
Unsuitable Extinguishing Media: Do not use direct water stream. Water may spread the material or cause splattering.
Specific Hazards: Combustion may produce oxides of carbon, silicon oxides, aldehydes, and irritating vapors.
Firefighter Protection: Wear self-contained breathing apparatus and full protective suit.
Explosion Data: Containers may burst in heat. Vapors can travel to ignition source.
Special Procedures: Isolate fire scene, cool containers with water spray to prevent pressure buildup.
Personal Precautions: Evacuate non-essential personnel, avoid breathing vapors. Wear chemical goggles, gloves, protective clothing, and respirator if needed.
Spill Response: Absorb liquid with inert material (sand, earth, vermiculite), then collect and place in suitable container for disposal.
Environmental Precautions: Prevent entry into sewers, drains, or waterways. Notify authorities if large spills enter environment.
Clean-up Procedures: Wash contaminated area with large volumes of water after material pickup.
Handling: Use in a well-ventilated area. Avoid inhalation, ingestion, and direct contact. Keep container tightly closed. Ground and bond containers during transfer.
Storage: Store in a dry, cool, well-ventilated place away from heat and ignition sources. Protect containers from physical damage. Keep away from oxidizing agents, acids, and moisture.
Precautions: Use non-sparking tools and avoid static electricity. Do not store in unlabeled or damaged containers.
Engineering Controls: Use local exhaust ventilation to control airborne concentrations. Emergency eyewash and safety shower recommended.
Personal Protective Equipment: Chemical-resistant gloves, splash goggles, protective clothing, and suitable respiratory protection.
Hygiene Measures: Wash hands thoroughly after handling. Remove contaminated clothing and protective equipment before eating or drinking.
Exposure Limits: No occupational exposure limits set by OSHA, NIOSH, or ACGIH for this specific compound.
Other Controls: Monitor airborne concentrations in workplace. Provide training for safe chemical handling.
Appearance: Clear to pale yellow liquid
Odor: Mild, ether-like
Odor Threshold: Not available
pH: Not applicable
Melting/Freezing Point: Not established
Boiling Point: Approximately 120-200°C (varies by molecular weight)
Flash Point: 70-100°C (closed cup, varies by formulation)
Evaporation Rate: Not determined
Flammability: Flammable liquid
Vapor Pressure: Low at room temperature
Vapor Density: Heavier than air
Relative Density: 1.05-1.13 g/cm³
Solubility in Water: Hydrolyzes slowly, forms alcohols and silanol
Partition Coefficient (n-octanol/water): Data not available
Autoignition Temperature: Not determined
Decomposition Temperature: Not established
Viscosity: 10–70 cP at 25°C
Molecular Weight: Varies by average chain length, typical commercial range 450–700 g/mol
Chemical Stability: Stable under recommended storage conditions. Sensitive to moisture, hydrolyzes releasing methanol.
Conditions to Avoid: Excessive heat, open flames, sparks, exposure to water or humid conditions.
Incompatible Materials: Strong acids, bases, oxidizing agents, water/moisture (hydrolysis reaction liberates methanol).
Hazardous Decomposition Products: Methanol, formaldehyde, carbon oxides, silicon dioxide.
Polymerization: No hazardous polymerization expected under normal use.
Routes of Entry: Inhalation, skin contact, ingestion, eye contact
Acute Toxicity: LD50 (Oral, rat) estimated >2000 mg/kg (test data for analogous materials); may irritate stomach if ingested
Skin Irritation: Can cause irritation, redness, and dryness. Prolonged or repeated contact may worsen effects.
Eye Damage/Irritation: May cause burning, redness, tearing, and pain.
Respiratory Effects: Breathing vapors may irritate respiratory tract, cause dizziness, drowsiness.
Chronic Effects: Data not conclusive. Chronic exposure to methanol vapor (a hydrolysis byproduct) can affect central nervous system, vision, and cause organ damage.
Carcinogenicity: No ingredients classified as carcinogens by IARC, NTP, or OSHA.
Sensitization: Rare, repeated exposure may cause allergic skin reaction.
Other Effects: Ingestion may be harmful if substantial amounts swallowed; hydrolysis may create methanol toxicity risk.
Aquatic Toxicity: Limited data available; hydrolysis produces methanol and silanols, both with moderate aquatic toxicity
Persistence/Degradability: Breakdown expected in soil and water; methanol degrades rapidly
Bioaccumulation: Unlikely owing to rapid hydrolysis and breakdown
Mobility in Soil: Likely to move through soil if spilled, especially before hydrolysis
Other Adverse Effects: Do not discharge untreated product into environment. Contact environmental authorities after large spills.
Waste Disposal: Comply with local, regional, and national regulations. Send waste to authorized chemical disposal facility.
Handling of Containers: Empty containers may retain residue; triple rinse before recycling or disposal.
Disposal Methods: Incinerate or use hazardous waste landfill for contaminated material. Do not release into natural waterways.
Special Precautions: Do not mix with household or municipal waste. Do not reuse empty containers without professional cleaning.
UN Number: 1993
Proper Shipping Name: Flammable liquid, n.o.s. (contains 3-(Methoxypolyoxyethylene)Trimethoxysilane)
Transport Hazard Class: 3 (Flammable liquid)
Packing Group: III
Labels: Flammable liquid
Marine Pollutant: Yes, for large volumes
Special Transport Precautions: Ship in tightly closed, approved containers. Prevent cargo movement or container leaks. Notify carrier of flammability.
TSCA: Listed on US Toxic Substances Control Act Inventory
DSL/NDSL (Canada): Present
REACH (EU): Registered or pre-registered—verify status with manufacturer
SARA Title III: Not subject to CERCLA reporting, but methanol (hydrolysis product) is regulated
OSHA Classification: Flammable liquid, Irritant
California Proposition 65: This product contains methanol (released by hydrolysis), known to the State of California to cause reproductive toxicity
Other Regulatory Listings: Information available through local, national chemical authorities; consult safety data resources for current updates.
