Used as a surface modifying agent in materials science, particularly for treating silica surfaces to make them hydrophobic. Commonly applied in the production of water-repellent coatings for glass, ceramics, and electronic components. Also serves as a coupling agent in composite materials to improve compatibility between organic polymers and inorganic fillers. Its long alkyl chain with a phenyl group enhances thermal stability and improves dispersion in non-polar matrices. Frequently employed in chromatography stationary phases to adjust polarity and retention behavior. Useful in microelectronics for passivation layers due to its ability to form stable, insulating films.