n-Octyltriethoxysilane / Triethoxyoctylsilane
CAS: 2943-75-1Octyltriethoxysilane is a hydrophobic silane coupling agent that forms a durable water-repellent monolayer on glass, silica, and inorganic mineral surfaces. Its ethoxy groups hydrolyze to bond with substrates while the long C8 alkyl chain lowers surface energy for strong moisture resistance. Ideal for glass hydrophobization, filler surface modification, masonry water-repellent coatings, and anticorrosion primers.
| Chemical Name | n-Octyltriethoxysilane |
|---|---|
| CAS Number | 2943-75-1 |
| Molecular Formula | C₁₄H₃₂O₃Si |
| Molecular Weight | 276.49 g/mol |
| Appearance | Colorless transparent liquid |
| Purity | ≥98% |
| Density (25°C) | 0.87-0.89 g/cm³ |
| Refractive Index (25°C) | 1.410-1.420 |
| Boiling Point | 289°C |
| Flash Point | 110°C |
| Packing | 200kg drums, IBC tanks, or as requested |
Hydrophobic coating for glass, silica gel, and quartz surfaces with contact angle above 100°.
Surface treatment of talc, calcium carbonate, and alumina to improve dispersion and compatibility in polymers.
Masonry, concrete, and stone protection against water penetration and efflorescence.
Primer additive that blocks moisture at the metal-substrate interface for longer coating life.
Breathable water-repellent finishing for fabrics, leather, and paper without changing hand feel.
Coupling agent between inorganic fillers and organic resins in composites and sealants.
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