Ethyltriacetoxysilane

Ethyltriacetoxysilane (CAS 17689-77-9) is an acetoxy-functional silane crosslinker, commercially available under designations including ES 23, E 6345, AC 3034, and Triacetoxyethylsilane. Registered under EC 241-677-4 with E-code E 6345, it belongs to the acetoxysilane subclass of organosilicon compounds.

In moisture-cure sealant and adhesive formulations, ethyltriacetoxysilane releases acetic acid upon hydrolysis, generating reactive silanol groups that crosslink silicone polymer networks and bond to mineral substrates such as glass and concrete. It also functions as a surface modifier in filled polymer systems, improving adhesion between inorganic fillers and organic matrices in coatings and construction applications.

Ethyltriacetoxysilane is subject to REACH registration requirements within the EU and is handled under HS code 29319090. It is supplied as a neat liquid in standard industrial packaging. Buyers should confirm grade specifications and SDS documentation with the supplier prior to procurement.