GHS Classification: Flammable Liquid (GHS02), Exclamation Mark (GHS07)
Hazard Statements: Highly flammable liquid and vapor (H225); Causes skin irritation (H315); Causes serious eye irritation (H319); May cause respiratory irritation (H335)
UN Number: UN 1993
Hazard Class: 3 (Flammable Liquids)
Packing Group: II
Trimethylethoxysilane
GTC-670
Representative packaging
Organosilicon Compounds
Trimethylethoxysilane
- CAS No.
- 1825-62-3
- Catalogue ID
- GTC-670
Trimethylethoxysilane, CAS 1825-62-3. Source-derived identification, physical data and applications are provided for catalogue reference; request the current specification, COA and SDS for the required grade.
Catalogue aliases / related identifiers
Ethoxytrimethylsilane; Ethyl trimethylsilyl ether; Trimethylsilyl ethyl ether; Trimethylsilicon ethoxide; Trimethylsilyl ethoxide; Silane, ethoxytrimethyl-
Supplied catalogue source: GTC-670 · Page 54
Reference data — confirm before ordering or use
The information below is a structured migration from the supplied catalogue snapshot. It is not a current product specification, COA or SDS. Confirm the actual supplier, grade, batch documents, classification, packing and destination requirements for your enquiry.
Basic Information of Trimethylethoxysilane
| CAS No.: | 1825-62-3 |
|---|---|
| EC No.: | 217-370-6 |
| Linear Formula: | (CH₃)₃SiOC₂H₅ |
| Molecular Weight: | 118.25 |
| Appearance: | Colorless liquid. |
| Odor: | Mild odor. |
| Melting Point: | -83 °C |
| Boiling point: | 75 °C(lit.) |
| Density: | 0.76 g/mL at 20 °C |
| Reactivity: | Moisture sensitive; hydrolyzes to form silanol and ethanol. |
| Flammability: | Flammable liquid and vapor; flash point -18 °C. |
| Corrosivity: | May cause irritation; handle with care. |
| RIDADR: | UN 1993 3/PG II |
| Chemical Structure: |  |
Our commitment to delivering high-purity Trimethylethoxysilane ensures a reliable and efficient component for your critical processes, offering consistent quality for diverse industrial needs, while prioritizing uncompromising safety in handling and logistics.
Primary Applications of Trimethylethoxysilane
Trimethylethoxysilane's role in silicone chemistry and surface modification makes it essential in various industries:
Silylating Agent:
Used to protect hydroxyl or amino groups in organic synthesis, allowing selective reactions on multi-functional compounds.
Surface Modification:
Modifies surfaces to impart hydrophobicity, used in coatings, water-repellents, and release agents for textiles, glass, and metals.
Silicone Polymer Synthesis:
Serves as an intermediate in the production of silicone fluids, resins, and elastomers, enhancing properties like thermal stability and flexibility.
Chromatography:
Deactivates glass surfaces in gas chromatography to improve separation and reduce peak tailing.
Coatings and Adhesives:
Improves adhesion and weather resistance in coatings, sealants, and adhesives for construction and electronics.
Nanoparticle Modification:
Functionalizes silica nanoparticles for hydrophobic coatings in materials like polyethylene.
Exceptional Purity & Consistent Quality: Our Trimethylethoxysilane is manufactured to stringent purity specifications, crucial for optimizing the performance and properties of the resulting products.
Expert Technical & Safety Support: Our dedicated team of experienced chemists and highly trained safety specialists is readily available to offer comprehensive guidance on product application, stringent safe handling procedures, emergency response planning, and optimal storage conditions for Trimethylethoxysilane.
Commitment to Quality & Responsible Stewardship: We adhere to the highest industry standards for quality management, environmental responsibility, and product stewardship across all our operations, ensuring peace of mind for our clients and the responsible management of hazardous chemicals.
Trimethylethoxysilane (CAS 1825-62-3) — Frequently Asked Questions
What is Trimethylethoxysilane (TMES)?
Trimethylethoxysilane ((CH₃)₃SiOC₂H₅, CAS 1825-62-3) is an alkoxysilane — a moisture-sensitive organosilicon reagent commonly used as a silylating agent and surface modifier.
What are the main uses of TMES?
It is primarily used as a silylating agent, surface modifier for hydrophobicity, in silicone synthesis, deactivating agent in chromatography, and in coatings and adhesives.
What are the key physical properties?
Typical properties: colorless liquid, mild odor, low boiling point, and it is moisture sensitive. Exact numbers (bp, density, vapor pressure) depend on grade — always check the product datasheet.
Is TMES moisture sensitive / does it react with water?
Yes. TMES hydrolyzes on contact with water, producing silanol and ethanol. Handle and store it under dry, inert atmosphere (e.g., N₂) to avoid hydrolysis.
Is Trimethylethoxysilane flammable?
Yes, it is flammable with a low flash point. Treat it as a flammable organic liquid — keep away from ignition sources and follow the SDS guidance for fire precautions.
What are the health hazards of TMES?
Exposure can cause irritation to eyes, skin, and respiratory system. Inhalation, ingestion or skin contact should be avoided; use appropriate PPE.
What personal protective equipment (PPE) is recommended?
Use chemical-resistant gloves, safety goggles, protective clothing, and work in a well-ventilated area. Use respiratory protection if necessary (see SDS).
How should TMES be stored?
Store in a cool, dry, well-ventilated area away from moisture and incompatible substances. Keep containers tightly sealed, preferably under inert gas.
How is TMES packaged and transported?
Supplied in moisture-tight containers (glass bottles or lined metal drums). Transport must follow dangerous-goods regulations — consult SDS for UN number and packing instructions.
What should I do in case of a spill?
Evacuate the area, ventilate, and avoid breathing vapors. Absorb with inert material and collect for hazardous waste disposal. Refer to SDS for details.
What are recommended disposal methods?
Dispose as hazardous chemical waste per local regulations. Do not release to environment. Consult SDS for approved methods.
Where can I find the authoritative safety information?
Always consult the product Safety Data Sheet (SDS) and applicable local regulations. The SDS contains definitive info on classification, UN number, PPE, first aid, and transport instructions for the exact grade and batch.
Hazards Classification
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Confirm the current commercial product record.
Include the required grade or purity, quantity, preferred packing, destination country/port and required document set.
- 01Current specification
- 02Batch or sample COA
- 03Product- and supplier-specific SDS
- 04Packing and shipping review
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