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Silane USi-6040 – Tetraethyl Orthosilicate (TEOS)
Non-Organoreactive Alkoxysilane for Binders, Crosslinking & Inorganic Matrices
CAS No.: 11099-06-2
EINECS No.: 234-324-0
Molecular Weight: 208.33 g/mol (Note: Corrected from TDS typo; actual MW = 208.33)
Synonyms:
Ethyl silicate; TetraethoxysilaneSilane USi-6040 is a high-purity, non-organoreactive alkoxysilane—chemically known as tetraethyl orthosilicate (TEOS). Upon hydrolysis, it forms reactive silanol (Si–OH) groups that condense into a silica (SiO₂) network. This makes it an essential inorganic precursor and binder in coatings, precision casting, ceramics, and RTV silicone systems.
🧪 Product Description
Chemical Formula: Si(OC₂H₅)₄
Chemical Structure:
![Structure: Si(OCH₂CH₃)₄]USi-6040 contains no organic functional group, distinguishing it from coupling agents like amino or methacrylate silanes. Instead, it serves as a pure silica source that:
- Hydrolyzes in the presence of moisture to form colloidal silica or silica gel
- Acts as an inorganic crosslinker or binder in high-temperature or chemically resistant applications
- Provides excellent thermal stability, chemical inertness, and adhesion to inorganic substrates
Commonly used where organic residues are undesirable.
📊 Typical Technical Data
The following values are typical and not intended for specification. Please confirm with our technical team before finalizing product requirements.
Parameter Specification Appearance Colorless transparent liquid Chroma (APHA) ≤ 30 Specific Gravity (20°C) 1.05 – 1.07 g/cm³ Silicon Dioxide (SiO₂) Content 40 – 42% Acidity (as HCl) ≤ 0.01% Ethanol Content ≤ 2% Viscosity (20°C) 4 – 7 cP
🏭 Key Applications
🔹 Binders in Paints & High-Temperature Coatings
- Used in inorganic zinc-rich primers and heat-resistant coatings
- Forms a durable, inorganic silicate matrix upon curing
- Offers superior corrosion protection and fire resistance
🔹 Room Temperature Vulcanizing (RTV) Silicone Systems
- Serves as a crosslinking agent in alkoxy-cure RTV-1 silicones
- Reacts with moisture to generate ethanol and build the Si–O–Si network
- Enables non-corrosive, low-odor cure vs. acetoxy systems
🔹 Precision Investment Casting
- Key component in ceramic shell binders for aerospace and turbine blades
- Provides high green strength and thermal stability during dewaxing and firing
🔹 Ceramics & Refractories
- Acts as an inorganic binder for ceramic powders, abrasives, and refractory molds
- Burns out cleanly without carbon residue → ideal for high-purity applications
📦 Packaging
Available in industrial-grade containers:
- 25 L pail
- 200 L drum
- 1,000 L IBC tote
All packaging ensures moisture protection to prevent premature hydrolysis.
⚠️ Safety & Storage
- Store in original unopened containers at or below 35°C
- Keep away from heat and open flame (product is flammable)
- Shelf Life: 12 months from production date under recommended conditions
- Use in well-ventilated areas; avoid contact with water during storage
- Consult the latest Safety Data Sheet (SDS) at www.usi-chemical.com or upon request
📞 Contact Us
Nanjing Union Silicon Chemical Co., Ltd.
Your Reliable Source for High-Purity Alkoxysilanes & Inorganic Precursors- Headquarters:
Room 2002, Overseas Chinese Plaza, No.1 Daqiao North Road, Nanjing 210031, Jiangsu, P.R. China - Factory Address:
Dongcheng Guanli District, Gaizhou 115200, Liaoning, P.R. China - Tel: +86-25-5889 5266 / 5889 5699
- Fax: +86-25-5830 5349
- Website: www.usi-chemical.com
- Email: service@usichemical.com
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