3-Mercaptopropyltriethoxysilane, CAS No. 14814-09-6

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14814-09-6

Catalog No. EBD12666

CAS 14814-09-6

Name 3-Mercaptopropyltriethoxysilane

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Basic Information

Synonyms: γ-Mercaptopropyltriethoxysilane SilaneCouplingAgentKH-590 SilaneCouplingAgentA-1891 3-Mecaptopropyltriethoxysilane 3-(triethoxysilyl)propane-1-thiol gamma.-Mercaptopropyltriethoxysilane 3-Mercaptopropyltriethoxysilane (3-Mercaptopropyl)triethoxysilane KH-580 3-Triethoxysilyl-1-propanethiol gamma-Mercaptopropyltriethoxysilane

Molecular Formula: C9H22O3SSi

Molecular Weight: 238.42

MDL Number: MFCD00053924

Categories: Materials Chemistry > Surface Modification and Functional Coatings > Silanes and Alkoxysilanes Synthetic Chemistry > Organic Building Blocks > Other Organic Building Blocks

Product Description:

Γ-Mercaptopropyltriethoxysilane is an organosilane coupling agent characterized by a triethoxysilyl group at one end and a mercapto (-SH) group at the other. This bifunctional structure allows it to act as a molecular bridge between inorganic substrates and organic polymers. Its primary and most significant application is in the field of surface modification and functional coatings. The silane end hydrolyzes to form silanols that can chemically bond to glass, metals, and mineral surfaces. The thiol group can then participate in reactions, such as thiol-ene click chemistry or coordination with metal surfaces, to introduce specific functionalities or enhance adhesion for coatings, sealants, adhesives, and rubber composites. It is widely used as an adhesion promoter in tire manufacturing (silica-filled rubber) and in glass fiber-reinforced plastics. Due to its reactive thiol and hydrolyzable alkoxysilane groups, it also serves as a versatile synthetic building block in organic and materials chemistry for constructing more complex silane-based molecules or functionalized materials.

Physical Properties

Boiling Point: 210 °C

Flash Point: 88 °C

Density: 0.987 g/mL at 20 °C(lit.)

Refractivity: 1.4331

Storage: 2-8°C

Safety Information

Packing Level:

Hazard Category:

Transport Codes: 3334

Analytical Data

Appearance: Clear to straw liquid with unpleasant odor of sulfide