
3-Mercaptopropyltriethoxysilane
| Chemical Name: | 3-Mercaptopropyltriethoxysilane |
| Product Category: | Mercapto silanes | Silane Coupling Agent |
| Structural Formula: | ![]() |
| CAS No.: | 14814-09-6 |
| EINECS: | 238-883-1 |
| Molecular Formula: | C₉H₂₂O₃SSi |
| Molecular Weight: | 238.42 g/mol |
| Appearance: | Colorless to Almost colorless |
3-Mercaptopropyltriethoxysilane Description
3-Mercaptopropyltriethoxysilane (CAS 14814-09-6) is a highly efficient silane coupling agent with extensive applications in rubber manufacturing, polymer modification, and surface treatments. It enhances mechanical properties, improves adhesion, and increases chemical resistance in various formulations.
| Chemical Name | 3-Mercaptopropyltriethoxysilane |
| Synonyms | γ-Mercaptopropyltrimethoxysilane, 3-Mercaptopropyltrimethoxysilane |
| Boiling Point | 210°C |
| Density | 0.987 g/mL at 20°C |
| Flash Point | 88°C |
| Refractive Index | 1.4331 at 25°C |
| Solubility | Hydrolyzes slowly in water; soluble in alcohols, ketones, aliphatic and aromatic hydrocarbons |
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3-Mercaptopropyltriethoxysilane: Guide
3-Mercaptopropyltriethoxysilane (CAS 14814-09-6) is a bifunctional organosilane with a mercapto (-SH) and a triethoxysilyl (-Si(OCH₂CH₃)₃) group. It enhances adhesion between organic and inorganic materials, making it a valuable coupling agent.
Applications:
Rubber & Tires: Improves silica dispersion, adhesion, and durability.
Adhesives & Sealants: Enhances bonding strength and flexibility.
Surface Treatment: Modifies inorganic surfaces for better compatibility.
Widely used in rubber, coatings, and adhesives, it enhances durability, adhesion, and processing efficiency.












