CAS 1067-25-0: Propyltrimethoxysilane

Trimethoxy(propyl)silane is a chemical compound that belongs to the group of organic compounds. It has been used in analytical chemistry as a reagent for fatty acid analysis. Trimethoxy(propyl)silane reacts with carboxylic acids and forms esters, which can be detected by gas chromatography. This compound can also be used as a solvent for methanol, hydroxyl-containing compounds, and nitrogen-containing compounds. The thermal expansion coefficient of trimethoxy(propyl)silane has been measured with an electrochemical impedance spectroscopy technique and found to have high values, indicating its stability. The presence of hydroxyl groups on this compound is confirmed by plasma mass spectrometry. Trimethoxy(propyl)silane is also a model system for zirconium oxide materials.

It finds its application as an important material in sol-gel production, provides a hydrophobic surface treatment for inorganic powders or filter materials and it is one of the catalyst component for polyolefin production with Ziegler-Natta catalyst. This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.

Alkyl Silane - Conventional Surface Bonding Aliphatic, fluorinated aliphatic or substituted aromatic hydrocarbon substituents are the hydrophobic entities which enable silanes to induce surface hydrophobicity. The organic substitution of the silane must be non-polar. The hydrophobic effect of the organic substitution can be related to the free energy of transfer of hydrocarbon molecules from an aqueous phase to a homogeneous hydrocarbon phase. A successful hydrophobic coating must eliminate or mitigate hydrogen bonding and shield polar surfaces from interaction with water by creating a non-polar interphase. Although silane and silicone derived coatings are in general the most hydrophobic, they maintain a high degree of permeability to water vapor. This allows coatings to breathe and reduce deterioration at the coating interface associated with entrapped water. Since ions are not transported through non-polar silane and silicone coatings, they offer protection to composite structures ranging from pigmented coatings to rebar reinforced concrete. A selection guide for hydrophobic silanes can be found on pages 22-31 of the Hydrophobicity, Hydrophilicity and Silane Surface Modification brochure. n-Propyltrimethoxysilane, 1-(trimethoxysilyl)-n-propane, trimethoxy-n-propylsilane, γc of treated surfaces: 28.5 mN/mUsed in microparticle surface modificationDonor in Zeigler-Natta polymerization catalyst systems for polyolefinsAvailable as a cohydrolysate with N-(2-aminoethyl)-3-aminopropyltrimethoxysilane (SIA0591.0) ; see SIA0591.3 Trialkoxy silane

Trimethoxy(propyl)silane

S14125 - n-Propyltrimethoxysilane