Chemical Name: 3-Methylacryloyloxypropylmethyldimethoxysilane
CAS Number: 14513-34-9
Synonyms: Methacryloxypropylmethyldimethoxysilane
Product Use: Used in silane coupling and surface modification for a range of industrial and research applications.
Manufacturer: Listed on product supplier documentation, always cross-check contact information.
Contact Information: Refer to shipping label or packaging for direct lines such as emergency contact numbers, which should include chemical safety experts and local emergency services.
Emergency Overview: Colorless liquid. Strong odor. May irritate eyes, respiratory passage, and skin. Flammable liquid and vapor.
GHS Classification: Eye irritant category 2A, skin irritant category 2, flammable liquid category 3, specific target organ toxicity (single exposure) category 3.
Signal Word: Warning
Hazard Statements: Causes skin and eye irritation. May cause respiratory irritation. Flammable liquid and vapor. Harmful if swallowed or inhaled.
Pictograms: Flame, exclamation mark
Precautionary Statements: Avoid breathing vapor. Keep away from heat, sparks, and open flames. Wear protective gloves and goggles. Wash hands thoroughly after handling.
Chemical Identity: 3-Methylacryloyloxypropylmethyldimethoxysilane
Chemical Formula: C11H22O4Si
Concentration: 95–100%
Impurities: Trace methacrylic acid esters below 2%, negligible, but can increase risk in concentrated industrial environments.
Other Components: Stabilizers, if listed on the product label, usually less than 0.1% by weight.
Inhalation: Move affected person to fresh air. Ensure access to clean air. Seek medical attention if breathing becomes difficult.
Skin Contact: Remove contaminated clothing, rinse skin with plenty of water and soap. Do not use solvents to clean skin. If irritation appears, consult a healthcare provider.
Eye Contact: Rinse eyes thoroughly with water for at least 15 minutes. Remove contact lenses if present. Immediate medical attention is recommended.
Ingestion: Do not induce vomiting. Rinse mouth with water. Seek immediate medical assistance.
Notes for Physicians: Treat symptoms and observe for delayed effects, especially on respiratory system.
Suitable Extinguishing Media: Use alcohol-resistant foam, dry chemical powder, carbon dioxide, or water spray.
Specific Hazards: Releases toxic fumes under fire conditions, including carbon oxides, silicon oxides, and possible acrylates.
Protective Equipment: Firefighters should use self-contained breathing apparatus and full protective clothing.
Special Procedures: Cool containers with water spray from a safe distance. Avoid breathing fumes.
Personal Protection: Use proper ventilation. Wear gloves, protective goggles, and a suitable mask to prevent inhalation and contact.
Spill Cleanup: Absorb with sand or inert material. Collect in tightly closed containers. Wipe surfaces with damp cloth.
Environmental Precautions: Prevent release to surface water or drains. Inform local environmental authorities if spill enters waterways.
Decontamination: Wash area with soap and water. Ventilate area after cleanup.
Handling Conditions: Keep away from ignition sources. Use equipment and containers designed for flammable chemical storage. Practice good hygiene.
Storage Requirements: Store in tightly closed containers in a cool, ventilated spot. Keep away from direct sunlight and moisture.
Incompatible Materials: Avoid strong oxidizers and water.
Special Considerations: Use explosion-proof electrical systems in storage and handling areas.
Exposure Limits: No established OSHA or ACGIH exposure limits, but minimize exposure by following good laboratory and workplace practices.
Engineering Controls: Use chemical fume hoods or local exhaust systems. Maintain proper air exchange.
Personal Protection: Use tight-fitting goggles, nitrile or neoprene gloves, and flame-resistant clothing. Use a respirator certified for organic vapor if airborne concentrations may exceed recommended exposure levels.
Hygiene Measures: Wash hands before meals and after finished work. Remove contaminated clothing.
Appearance: Colorless to pale yellow clear liquid.
Odor: Acrylate-like, pungent.
Melting Point: Not applicable; remains liquid at typical environmental temperatures.
Boiling Point: Approximately 220–240 °C at 760 mmHg.
Flash Point: 82–88 °C (closed cup).
Solubility: Reacts slowly with water, soluble in common organic solvents such as acetone, ethanol, and toluene.
Density: 1.02–1.04 g/cm³ at 20 °C.
Vapor Pressure: Low, under normal storage conditions.
pH: Not applicable in water due to hydrolysis.
Viscosity: Low, easy to pour.
Partition Coefficient (log Kow): No established value, but expected to be moderate due to organic-silicon structure.
Chemical Stability: Stable under standard, sealed storage conditions, but hydrolyzes in contact with moisture.
Conditions to Avoid: Exposure to moisture, heat, open flames, and direct sunlight.
Incompatible Materials: Strong oxidizers, acids, water, and bases.
Hazardous Decomposition Products: Carbon oxides, silicon oxides, acrylates, methanol upon hydrolysis.
Polymerization: Can occur due to exposure to light or heat in presence of peroxides or radical initiators, causing potential container rupture.
Acute Toxicity: Harmful by inhalation, ingestion, and skin absorption. Typical LD50 (oral, rat): 2000–4000 mg/kg. LD50 (dermal, rabbit): >2000 mg/kg.
Skin Corrosion/Irritation: Causes irritation, redness, or dryness after brief exposure.
Serious Eye Damage/Irritation: Causes pain and possible eye injury if splashed.
Respiratory Sensitization: Irritation, coughing, shortness of breath from fumes.
Carcinogenicity: Not listed by NTP, IARC, or OSHA as carcinogenic, though methacrylate monomers have shown potential risks in laboratory animals.
Reproductive Toxicity: No clear data, avoid exposure if pregnant or breastfeeding.
Chronic Effects: Prolonged repeated exposure may worsen irritation or respiratory conditions.
Persistence and Degradability: Partial hydrolysis to silanols and methanol, slow degradation under ambient conditions.
Bioaccumulation Potential: Expected to be low due to hydrolytic breakdown.
Aquatic Toxicity: Harmful to aquatic life with long-lasting effects. Acute LC50 (fish): 10–100 mg/L over 96 hours.
Soil Mobility: Reacts to form insoluble siloxanes, may persist in low-oxygen soils.
Environmental Fate: Avoid spills into drains, groundwater, or natural water sources.
Waste Treatment Methods: Collect and deliver as hazardous waste in compliance with local, regional, and national regulations.
Recommended Incineration: Use licensed chemical incinerators with afterburner and scrubber.
Contaminated Packaging: Rinse with suitable solvent, then dispose of as hazardous material.
Do Not: Release to the environment or discard down household drains.
UN Number: 1993 (Flammable liquid, n.o.s.)
Proper Shipping Name: Flammable Liquid, N.O.S. (3-Methylacryloyloxypropylmethyldimethoxysilane)
Transport Hazard Class: 3 (Flammable liquids)
Packing Group: III
Marine Pollutant: Yes
Special Precautions: Ship separately from oxidizers and foodstuffs. Ensure leak-proof, UN-approved packaging. Use flammable liquid warning labels.
Emergency Response Guide: Reference ERG 128 for flammable liquids.
OSHA Status: Regulated as a hazardous chemical in workplaces; employers must provide training and access to this MSDS.
TSCA Status: Listed on TSCA Inventory.
SARA Title III: Subject to reporting in case of environmental release above threshold quantity.
REACH: Registered as an industrial chemical in Europe; subject to annual review and update.
State Regulations: Check local state guidelines and Prop 65 for additional restrictions.
HMIS Rating: Health: 2, Fire: 2, Reactivity: 1, PPE: B
WHMIS Classification (Canada): Class B, Division 2: Flammable Liquid; Class D, Division 2B: Toxic Material Causing Other Toxic Effects.
