Product Name: Methacryloxymethyltriethoxysilane
Chemical Formula: C11H22O5Si
Chemical Family: Organosilane
Synonyms: 3-(Triethoxysilyl)methoxypropyl methacrylate
Manufacturer: Listed supplier or manufacturer address and contact information
Recommended Use: Used as coupling agent, crosslinker or adhesion promoter in composite material manufacturing
Emergency Contact: National Poison Center or company’s emergency phone number
Hazard Classification: Flammable liquid, skin irritant, serious eye irritant, suspected respiratory irritant
Signal Word: Warning
Hazard Statements: Causes skin and serious eye irritation. Vapors may cause drowsiness or dizziness. May be harmful if swallowed. Flammable liquid and vapor. Prolonged or repeated exposure may dry skin or cause dermatitis. May form explosive peroxides.
Pictograms: Flame, exclamation mark
Precautionary Statements: Avoid breathing vapors. Use protective gloves and eye/face protection. Use only outdoors or in a well-ventilated area. Remove contaminated clothing and wash before reuse.
Chemical Name: Methacryloxymethyltriethoxysilane
CAS Number: 2530-85-0
Concentration: >98% by weight
Impurities: Trace amounts of hydrolysis byproducts, methacrylic acid, and ethanol may be present from decomposition or storage
Hazardous Components: Methacryloxy functional group contributes to possible sensitization and eye/skin irritation; triethoxysilane moiety hydrolyzes to form ethanol which can contribute to flammability concerns
Inhalation: Move to fresh air. Keep at rest. Seek medical help if symptoms such as dizziness, headache or nausea develop. If not breathing, give artificial respiration.
Skin Contact: Remove contaminated clothing and shoes. Rinse skin immediately with plenty of water and soap for at least 15 minutes. Get medical attention if irritation persists or allergic reactions appear.
Eye Contact: Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do. Keep eye wide open and continue rinsing for at least 15 minutes. Consult an ophthalmologist.
Ingestion: Rinse mouth with water. Do not induce vomiting. Seek medical advice, showing this sheet. Give small quantities of water to drink if conscious.
Suitable Extinguishing Media: Carbon dioxide, dry chemical powder, alcohol-resistant foam. Water mist to cool containers.
Unsuitable Extinguishing Media: High pressure water jets may spread liquid.
Hazardous Combustion Products: Emits carbon oxides, silicon oxides, and irritating acrid fumes when burned. May form formaldehyde upon incomplete combustion.
Fire and Explosion Hazards: Vapors heavier than air spread along ground and may ignite at a distance from the source. Containers may rupture or explode under fire conditions.
Protective Equipment for Firefighters: Wear self-contained breathing apparatus (SCBA) and full protective gear to prevent skin and eye contact.
Personal Precautions: Evacuate unnecessary personnel. Avoid inhaling fumes, skin and eye contact. Use PPE including gloves, goggles, and respirator if ventilation inadequate.
Environmental Precautions: Prevent product from entering drains, waterways or soil. Notify relevant authorities if large spill occurs.
Methods for Cleanup: Ventilate affected area. Absorb liquid with inert material such as sand, earth or vermiculite. Shovel into suitable chemical waste containers for disposal. Wash residue with water and detergent, collect washings for safe disposal. Decontaminate surfaces thoroughly.
Handling: Use only in areas with adequate ventilation or local exhaust. Avoid contact with skin, eyes, and clothing. Ground and bond containers and equipment during transfer. Do not smoke or use open flame in work area. Use spark-proof tools and explosion-proof equipment.
Storage: Store in tightly closed original containers in a cool, dry, well-ventilated place, segregated from oxidizers, acids, and moisture. Keep away from direct sunlight and sources of ignition. Protect against physical damage. Store away from food, drink, and animal feed.
Packaging Materials: Preferred containers are glass, stainless steel, or lined steel drums to minimize hydrolysis and contamination.
Exposure Limits: No specific occupational exposure limits established for this compound. Observe limits for methacrylate monomers and ethanol if generated.
Engineering Controls: Local exhaust ventilation or general area ventilation. Maintain at or below recommended exposure guidelines.
Personal Protective Equipment: Chemical-resistant gloves (nitrile or neoprene), safety goggles with side shields or face shield, lab coat or apron, suitable respirator if ventilation inadequate (organic vapor cartridge). Wash hands thoroughly after handling.
Hygiene Measures: Do not eat, drink, or smoke during use. Remove contaminated clothing before leaving area.
Appearance: Colorless to pale yellow liquid
Odor: Faint, characteristic acrylate-like odor
pH: Not applicable (reacts with water to release ethanol and methacrylic acid)
Melting Point/Freezing Point: Not measured, expected below –20°C
Initial Boiling Point and Range: Approximately 100–110°C at atmospheric pressure
Flash Point: 68°C (closed cup)
Evaporation Rate: Slower than ether, similar to other organosilanes
Flammability (solid/gas): Flammable liquid
Vapor Pressure: 0.2 mmHg at 25°C
Vapor Density: Heavier than air
Solubility: Slightly soluble in water; hydrolyzes to form ethanol and silanols
Partition Coefficient (log Pow): Estimated 2–3 (moderate potential for bioaccumulation)
Decomposition Temperature: Above 150°C
Viscosity: Low, similar to water or light oils
Chemical Stability: Stable under recommended storage conditions. Slowly hydrolyzes in presence of atmospheric moisture.
Reactivity: Reacts with water and moisture, liberating ethanol and methacrylic acid. Undergoes addition polymerization.
Incompatible Materials: Strong acids, strong bases, oxidizing agents, amines, alcohols, water. Generates excess heat or hazardous byproducts during reactions.
Hazardous Decomposition Products: Carbon oxides, silicon dioxide, methacrylic acid, formaldehyde, ethanol, smoke
Polymerization Risk: Exothermic polymerization possible in contact with peroxides, free radicals, or elevated temperature.
Routes of Exposure: Inhalation, skin contact, eye contact, ingestion
Acute Toxicity: Low to moderate acute toxicity; oral LD50 (rat) estimated between 2,000 and 5,000 mg/kg.
Skin Corrosion/Irritation: Moderate to strong irritant. Frequent or prolonged contact may cause defatting, dermatitis.
Serious Eye Damage/Irritation: Strong irritant; may cause redness, pain, blurred vision.
Respiratory Sensitization: Vapors may irritate upper respiratory tract producing cough, headache, dizziness.
Skin Sensitization: Occasional reports of allergic contact dermatitis in sensitive individuals.
Chronic Effects: Long-term or repeated exposure can result in desensitization, persistent dermatitis, and possible sensitization.
Carcinogenicity: Not listed by IARC, NTP or OSHA as human carcinogen.
Mutagenicity and Reproductive Toxicity: No definitive evidence. Structural similarity to methacrylates indicates need for precaution.
Other Effects: May aggravate existing skin, eye, or respiratory conditions.
Ecotoxicity: Not classified as highly toxic to aquatic life. Methacrylates and silanols formed upon hydrolysis may have adverse effects on fish and daphnia in high concentrations.
Persistence and Degradability: Partially hydrolyzable in water. Degrades in soil and water, but alcohols and acids produced may persist.
Bioaccumulation Potential: Moderate; log Pow indicates some bioaccumulation risk for aquatic organisms.
Mobility in Soil: Moderate mobility. Hydrolysis products can leach through soil.
Other Adverse Effects: Large-scale spills may contribute to eutrophication or impact aquatic plant growth if released into waterways.
Waste Generation: Dispose of this product and its container in accordance with federal, state, and local regulations.
Disposal Methods: Send residual material to an approved chemical incinerator or hazardous waste treatment facility. Do not discharge into sewer, waterways or soil.
Container Disposal: Triple rinse with compatible solvent and puncture prior to disposal, or return to supplier for recycling if permitted.
Precautions: Personnel handling waste should wear suitable protective gear and avoid direct contact or inhalation of fumes.
UN Number: UN1993
UN Proper Shipping Name: Flammable Liquid, N.O.S. (Methacryloxymethyltriethoxysilane)
Transport Hazard Class: 3 (Flammable liquid)
Packing Group: III (minor hazard)
Labels Required: Flammable liquid hazard label
Special Precautions: Keep away from heat, sparks, open flames, and oxidizers during transport. Secure containers to prevent movement or leakage. Ensure compliance with applicable international, federal, and local transportation regulations for hazardous chemicals.
OSHA Status: Listed for hazard communication as hazardous due to flammability and irritant properties.
TSCA Status: Listed on TSCA Inventory. Subject to chemical-specific reporting.
SARA Title III (Sections 302/304/313): Not specifically listed as an extremely hazardous substance. Report releases above regulatory threshold.
RCRA Status: Not listed as hazardous waste; may become hazardous if mixed with other regulated components.
California Proposition 65: Not listed as a known carcinogen or reproductive toxin.
EU Classification: Flammable; Skin Irritant; Eye Irritant. Subject to REACH registration.
Other Regulations: Comply with workplace exposure, labeling, and environmental requirements in all jurisdictions where product is stored and handled.
