Phenyltrimethoxysilane

Phenyltrimethoxysilane (CAS 2996-92-1) is an organosilane coupling agent commercially available under trade designations including A 153, Z 6071, PTS 31, P 0330, and CP0330. It carries no assigned E-code and is classified under HS code 29319090 within the broader silicones and silicates category.

In coatings and polymer systems, phenyltrimethoxysilane improves adhesion between organic resins and inorganic substrates by forming covalent siloxane bonds at the interface following hydrolysis of its methoxy groups. In electronics encapsulants and silicone elastomers, it functions as a crosslinker and surface modifier, reducing moisture uptake and improving thermal stability at the resin-substrate boundary.

Phenyltrimethoxysilane is supplied as a REACH-registered substance and is available in standard industrial drum and IBC packaging formats. Procurement teams should confirm supplier documentation for REACH compliance, SDS availability, and any applicable export control classifications prior to ordering.