Product Introduction
Ethyltrichlorosilane (CAS 115-21-9), also known as ETCS, is an organometallic compound belonging to the organohalosilane family. It is a colorless, clear liquid with a pungent, suffocating odor due to its reaction with moisture to release hydrogen chloride (HCl). ETCS is a fundamental building block in the silicones industry, primarily utilized for introducing ethyl functionality into silicone polymers and as a surface treatment agent to impart hydrophobic characteristics to various substrates.
Product Selling Points
1. High Trichlorosilane Reactivity
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Advantage: Readily undergoes hydrolysis and condensation to form stable siloxane networks.
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Benefit: Efficient Synthesis: Accelerates the production of high-performance silicone resins, saving energy and reducing cycle times.
2. Strong Hydrophobic Properties
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Advantage: Effectively introduces ethyl groups into siloxane chains or onto surfaces.
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Benefit: Superior Protection: Enhances the water-repellency of masonry, textiles, and coatings, significantly extending the life of treated materials.
3. Strict Purity Control (≥ 99.0%)
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Advantage: Low levels of impurities like silicon tetrachloride and branched isomers.
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Benefit: Consistent Quality: Ensures predictable reaction kinetics and high-quality end-products with excellent mechanical and thermal stability.
Applications
Silicone Resin Synthesis
Used as a primary raw material for manufacturing silicone resins where ethyl groups are required to modify the flexibility and heat resistance of the polymer.
Waterproofing & Surface Treatment
Applied in the formulation of water-repellent agents for masonry, ceramics, and textiles to provide a durable hydrophobic barrier.
Chemical Intermediates
Serves as a vital intermediate for the production of ethyl-based silicates and other specialized organosilicon derivatives.
Laboratory Reagent
Employed in organic synthesis for the introduction of ethylsilyl groups in specialized chemical research and pharmaceutical intermediates.
Packaging & Storage
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Packaging: 200kg UN-certified steel drums or ISO tanks.
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Storage: Store in a cool, dry, and well-ventilated warehouse. Crucial: Keep away from moisture, heat, and open flames. Containers must be hermetically sealed with nitrogen padding to prevent hydrolysis.
Matching Materials
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Methyltrichlorosilane (CAS 75-79-6) —— Co-monomer for silicone resin modification
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Dimethyldichlorosilane (CAS 75-78-5) —— Chain extender in silicone polymers
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Phenyltrichlorosilane (CAS 98-13-5) —— Enhancer for thermal stability in resins
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Trimethylchlorosilane (CAS 75-77-4) —— End-capping agent for chain termination
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Ethanol (CAS 64-17-5) —— Reagent for ethoxysilane synthesis
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Methanol (CAS 67-56-1) —— Reagent for methoxysilane synthesis
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Toluene (CAS 108-88-3) —— Reaction solvent and diluent
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Platinum Catalyst (CAS 12607-70-4) —— Catalyst for hydrosilylation reactions
FAQ
Q: Why does Ethyltrichlorosilane smoke when the container is opened?
A: The “smoke” is actually hydrogen chloride (HCl) gas, formed instantaneously when the liquid reacts with moisture in the air. Proper PPE and ventilation are mandatory.
Q: Is it safe to store this product in plastic containers?
A: No. ETCS should be stored in high-quality carbon steel or stainless steel drums. It can degrade many plastics and the resulting HCl gas can cause pressure buildup.
Q: How does the reactivity of Ethyltrichlorosilane compare to Methyltrichlorosilane?
A: It is slightly less volatile than Methyltrichlorosilane but shares a similar high level of reactivity towards hydrolysis and alcoholysis.
Q: Can Ethyltrichlorosilane be shipped by air?
A: It is strictly regulated as a Class 8 (Corrosive) and Class 3 (Flammable) material (UN 1196). Sea freight in UN-certified drums is the standard method.
Q: What is the shelf life of Ethyltrichlorosilane?
A: Typically 12 months, provided the seal remains intact and it is stored under nitrogen in a cool, dry place away from direct sunlight.
