Tetrabutyl orthosilicate

Tetrabutyl orthosilicate (CAS 4766-57-8) is an organosilicon compound also known as silicon butoxide, n-butylsilicate, or by trade designations such as MKC Silicate BTS and CT1750. It carries no assigned E-code and is classified under HS code 29209090 within the silicones and silicates category.

In coatings and construction applications, it functions as a crosslinking agent and surface modifier, reacting with moisture to form silica networks that improve substrate adhesion and durability. In electronics manufacturing, it serves as a sol-gel precursor, hydrolyzing under controlled conditions to deposit thin silicon oxide layers on components.

Tetrabutyl orthosilicate is supplied as a liquid under REACH registration and handled in accordance with applicable EU chemical regulations. Standard packaging formats for industrial procurement include drums and intermediate bulk containers. Buyers should confirm grade specifications and purity certificates directly with the supplier prior to ordering.