In the organosilicon synthesis system, tetra-propoxy silane IOTA 933 stands out as a critical bridge linking basic chemical synthesis to advanced materials, thanks to its high purity and versatile chemical reactivity. As the designated product name for n-propyl orthosilicate (tetra-n-propyl silicate), its well-defined chemical structure Si(OC₃H₇)₄ endows it with stable and diverse application potential, making it widely suitable for key scenarios such as intermediate synthesis and cross-linking reactions.
Its solid technical specifications provide strong assurance for product performance.
IOTA 933 appears as a colorless, transparent liquid—clean and impurity-free—ensuring precise control throughout the reaction process. It is available in two purity grades: ≥98% for industrial grade and ≥99% for premium grade, enabling flexible selection depending on synthesis requirements. Verified by authoritative testing, the density remains stable at 0.916 g/ml at 25°C, and the refractive index is 1.395. Its physical properties are uniform and consistent. The boiling point of 94°C (5 mmHg) and flash point of 95°C further guarantee safety and controllability during storage and use. CAS No. 682-01-9 underscores its standardized and traceable nature.
Chemical reactivity is the core competitive advantage of IOTA 933, and its three major application pathways define its irreplaceable industrial value.
First, when reacting with hydrogen chloride or organic acyl chlorides, it precisely produces propoxy chlorosilanes (C₃H₇O)₄₋ₙSiClₙ—key precursors for manufacturing functional silane derivatives.
Second, when interacting with organometallic compounds, the propoxy groups within the Si-OC₃H₇ bonds can be efficiently substituted by organic groups, forming stable Si-C bonds—an essential feature that opens new possibilities for customized organosilicon material development.
Third, it serves as a core raw material in organosilicon intermediate synthesis and functions as a dedicated crosslinker for room-temperature vulcanized (RTV) silicone rubber, directly influencing the vulcanization efficiency and final performance of silicone rubber products.
From laboratory research to large-scale industrial production, IOTA 933—supported by its stable physicochemical properties, controllable reactivity, and high purity—has become an indispensable component of the organosilicon supply chain. Whether producing specialty silane intermediates or optimizing the crosslinking process of RTV silicone rubber, choosing IOTA 933 means choosing synthesis stability and product reliability. It provides strong technical support for the development and manufacturing of high-end organosilicon materials.
