Propyltrimethoxysilane (1067-25-0) (C6H16O3Si)

Propyltrimethoxysilane is an organosilane coupling agent with the chemical formula C6H16O3Si and molecular weight 164.28 g/mol. It appears as a clear, colorless liquid with a mild alcohol-like odor. It is moisture-sensitive and hydrolyzes in water to form silanols and methanol. It is soluble in many organic solvents and stable when kept dry.
In terms of uses and applications, Propyltrimethoxysilane is widely used as a surface treatment and adhesion promoter in coatings, sealants, adhesives, and composites. It improves bonding between inorganic materials such as glass, silica, and metals with organic polymers. It is also used in the rubber and plastics industries to enhance filler dispersion, water resistance, and mechanical strength. In construction chemicals, it serves in waterproofing and durability formulations. Additionally, it is applied in electronics, fiberglass, and specialty materials where strong interface performance is required.