Product Name: Tetrakis(2-Methoxyethoxy)Silane
Synonyms: Silane, tetrakis(2-methoxyethoxy)-
CAS Number: 18765-38-3
Recommended Use: Chemical intermediate, laboratory reagent
Manufacturer: Provided by registered chemical supplier
Emergency Contact: See supplier safety contact details on shipment paperwork
Classification: Flammable liquid (Category 3), Skin irritation (Category 2), Eye irritation (Category 2A), Specific target organ toxicity - single exposure (Category 3)
Hazard Statements: Flammable liquid and vapor. Causes skin and eye irritation. May cause respiratory irritation.
Precautionary Statements: Keep away from heat, sparks, open flames. Avoid breathing vapor. Wear protective gloves, clothing, and eye protection.
Substance: Tetrakis(2-Methoxyethoxy)Silane
Chemical Formula: Si[OCH₂CH₂OCH₃]₄
CAS Number: 18765-38-3
Concentration: 100% (Pure compound)
Inhalation: Move person to fresh air immediately. Seek medical attention if breathing becomes difficult.
Skin Contact: Wash thoroughly with soap and water for at least 15 minutes. Remove contaminated clothing.
Eye Contact: Rinse cautiously with water for several minutes. Remove contact lenses if possible. Continue rinsing. Get medical help.
Ingestion: Rinse mouth thoroughly. Do not induce vomiting. Seek medical advice without delay.
Suitable Extinguishing Media: Use alcohol-resistant foam, dry chemical, or carbon dioxide. Water may be ineffective.
Unsuitable Extinguishing Media: Direct water stream (risk of spreading fire)
Specific Hazards: Vapors may form explosive mixtures with air. Can emit toxic fumes under fire conditions.
Protective Equipment: Firefighters should wear self-contained breathing apparatus and protective gear.
Personal Precautions: Evacuate area. Use personal protective equipment. Avoid breathing vapors.
Environmental Precautions: Prevent spillage from entering drains, watercourses, or soil.
Clean-Up Methods: Absorb with inert material such as sand or vermiculite. Shovel into non-sparking containers for disposal. Ventilate area.
Safe Handling: Keep container tightly closed. Open and handle only in well-ventilated areas. Ground and bond container and receiving equipment.
Storage Conditions: Store in cool, dry, well-ventilated place away from sources of ignition. Keep away from moisture, acids, oxidizers.
Incompatible Materials: Avoid contact with water, strong acids, strong bases, oxidizing agents.
Exposure Limits: No occupational exposure limits established for this compound.
Engineering Controls: Use closed process systems for handling. Provide local exhaust vent. Take precautions against static discharge.
Personal Protective Equipment: Safety goggles, impervious gloves, flame-resistant lab coat. Use NIOSH-approved respirator during large spills or insufficient ventilation.
Appearance: Colorless to pale yellow liquid
Odor: Faint ether-like
Odor Threshold: Not determined
pH: Not applicable
Melting Point / Freezing Point: Data not available
Boiling Point / Boiling Range: Approximately 155°C (311°F) at 5 mmHg
Flash Point: 85°C (185°F) (closed cup)
Evaporation Rate: Not determined
Flammability: Flammable liquid
Vapor Pressure: Data not available
Vapor Density: Heavier than air
Solubility: Decomposes in water
Partition Coefficient (n-octanol/water): Not determined
Autoignition Temperature: Data not available
Decomposition Temperature: Data not available
Viscosity: Not determined
Chemical Stability: Stable under recommended storage conditions. Decomposes slowly with moisture.
Hazardous Reactions: Reacts with water and humid air to produce methoxyethanol and silanols.
Incompatible Materials: Strong oxidizers, strong acids, moisture, alcohols.
Hazardous Decomposition Products: Silicon oxides, formaldehyde, methoxyethanol, carbon monoxide.
Acute Toxicity: No reliable quantitative data on acute oral or dermal toxicity. Inhalation may cause respiratory tract irritation.
Skin Irritation: Causes moderate skin irritation, dryness, and redness.
Eye Irritation: Causes moderate to severe eye irritation.
Respiratory Effects: High vapor concentrations may cause headache, dizziness, and respiratory tract irritation.
Chronic Effects: Repeated exposure could lead to skin sensitization, dermatitis, or respiratory discomfort.
Carcinogenicity: Not classified as a carcinogen according to IARC, NTP, OSHA.
Ecotoxicity: No specific data available. Possible risk to aquatic environments if released in large amounts due to hydrolysis products.
Persistence and Degradability: Undergoes slow hydrolysis in moist air to methoxyethanol, which is moderately biodegradable.
Bioaccumulative Potential: Potential for bioaccumulation is low for parent compound but higher for hydrolysis products.
Mobility in Soil: Likely to be mobile in soil if spilled due to water solubility of hydrolysis products.
Other Harmful Effects: No known significant effects or critical hazards documented.
Waste Treatment Methods: Collect and transfer to qualified waste disposal facility. Handling by licensed contractors familiar with chemical waste.
Disposal of Packaging: Triple rinse containers before recycling/disposal. Contaminated packaging handled as hazardous waste.
Do Not: Discharge to drains or the environment. Disposal must observe federal, state, and local regulations.
UN Number: 1993
UN Proper Shipping Name: Flammable liquid, n.o.s. (Tetrakis(2-methoxyethoxy)silane)
Transport Hazard Class: 3
Packing Group: III
Environmental Hazards: Refer to ecological information
Special Precautions for Users: Keep away from heat and open flames. Ensure containers remain tightly sealed in transit.
Transport Regulations: Subject to ground, air, and maritime transport provisions for flammable liquids.
OSHA: Classified as hazardous under OSHA Hazard Communication Standard
TSCA: Listed in the U.S. Toxic Substances Control Act inventory
SARA Title III: Not listed as an Extremely Hazardous Substance
DSL/NDSL (Canada): Listed/assessed
EU Classification: Not harmonized; local classification applies
International Inventory Status: Various national inventories list this substance
Labeling Requirements: Signal word: Warning. Pictograms: Flame, exclamation mark.
