Direct supply line of high-grade organosilicon structures, agricultural protectants, and tailored industrial precursors.
Understanding the chemical mechanics, performance advantages, and modern sol-gel processing paradigms of Tetrapropyl Orthosilicate.
Tetrapropoxysilane (TPOS), categorized under chemical formula Si(OC₃H₇)₄ and identified by the registry CAS 682-01-9, is an advanced inorganic ester of orthosilicic acid. As a structural homologue to the highly popular Tetraethyl Orthosilicate (TEOS), TPOS features extended propyl chain lengths. This architectural modification imparts higher steric hindrance and a lower chemical hydrolysis rate, offering chemical synthesis engineers and coating formulators unprecedented control over curing cycles and particle nucleation.
In high-end coating formulations and structural ceramics, TPOS acts as a crosslinking agent that yields highly homogenous, transparent, and heat-resistant silica matrices through controlled hydrolysis and condensation reactions (the sol-gel process). Shandong Boctok Chemical Co. stands at the forefront of China's advanced silicone industry, synthesis-refining TPOS under strict quality thresholds to serve international scientific and high-industrial standards.
Providing empirical comparative data between primary orthosilicates to assist process engineers in strategic formulation.
| Chemical Property | Tetrapropoxysilane (TPOS) | Tetraethyl Orthosilicate (TEOS) | Tetramethoxysilane (TMOS) |
|---|---|---|---|
| CAS Number | 682-01-9 | 78-10-4 | 681-84-5 |
| Molecular Formula | C₁₂H₂₈O₄Si | C₈H₂₀O₄Si | C₄H₁₂O₄Si |
| Boiling Point | 224.4 °C | 168.1 °C | 121.5 °C |
| Hydrolysis Speed | Slow / Highly Controllable | Moderate | Extremely Fast (High Toxicity risk) |
| Steric Hindrance | High (Propyl Alkoxy Group) | Medium (Ethyl Alkoxy Group) | Low (Methyl Alkoxy Group) |
| Primary Application | High-Performance Coatings, Optoelectronics | Glass, General Coatings, Castings | Silica Aerogels, Special Optics |
From aerospace thermal protection to optoelectronics, TPOS is the structural engine of high-performance silicate networks.
Under controlled conditions, Tetrapropoxysilane is deposited or spin-coated to yield ultra-high purity silicon dioxide (SiO₂) thin films. Its controlled hydrolysis enables thin-film consistency, reducing structural defects in optical layers, solar panel antireflective layers, and semiconductor dielectric barriers.
TPOS plays a decisive role in the synthesis of structural silica aerogels. The propyl chains slow down the precursor gelation phase, allowing for low-density supercritical drying. The resultant material exhibits extreme thermal resistance, perfect for aerospace atmospheric re-entry shields.
By blending TPOS with fluorinated silanes or alkylsilanes, chemical engineers create exceptionally durable hydrophobic coatings. The slow-release binding network anchors onto metals, plastics, and silica glass, yielding robust resistance to corrosion, UV exposure, and environmental wear.
Strategic capability stats reflecting Shandong Boctok Chemical Co.'s massive global delivery, industrial investment, and market dominance.
Boctok’s products are distributed widely across China and actively exported to North America, Europe, Japan, South Korea, Australia, South America, the Middle East, India, Southeast Asia, and Russia. By securing raw materials from tier-one domestic petrochemical giants SINOPEC and PetroChina, Boctok ensures pricing stability and supply continuity, sheltering our global corporate partners from sudden market shifts.
Our dedicated brand, specifically designed to optimize trade barriers and logistics within Eastern Europe and Russia, offers customized payment routes, seamless customs clearances, and multi-modal logistics networks to maintain high-capacity chemical supplies without disruption.
A premier chemical developer integrating organosilicon, industrial resins, and agrochemical intermediates.
Founded in 2012, Shandong Boctok Chemical Co. has developed into an international chemical powerhouse, registering a global transaction scale of US$280 million in 2023. Operating with a key specialty in serving the complex needs of Russian and global industrial buyers, the company maintains three core divisions designed to support the modernization of civil, industrial, and agricultural sectors.
Covering 12 core families of silane coupling agents and crosslinkers including aminosilane, methacrylate silane, epoxy silane, vinyl silane, mercaptosilane, alkyl silane, ethyl silicate, chlorosilane, silane isocyanates, phenyl silane, ureidosilane, and serosilane. Additionally, our high-hydrogen silicone oil, vinyl silicone oil, and specialized MQ/VMQ resins are trusted globally across wind energy, fiber optics, cables, and daily chemicals.
Backed by our three strategic manufacturing plants located in Zibo, Fushun, and Nanjing. We produce industry-grade C9 hydrogenated resins, C5 hydrocarbon resins, C5 modified C9 resins, and dicyclopentadiene (DCPD) dimers. By utilizing reliable and abundant raw feedstocks from SINOPEC and PetroChina, we provide global coatings and hot-melt adhesive manufacturers with superior tackifiers.
Our agricultural division focuses on organic intermediates and raw active components for herbicides, plant growth regulators, insecticides, fungicides, and seed treatments. By streamlining high-capacity synthesis, we provide rural cooperatives and multinational agricultural firms with cost-effective crop-yield solutions.
Providing heavy chemical precursors and agricultural systems with guaranteed structural integrity.
Providing essential materials across critical infrastructure, agriculture, consumer care, and modern electronics.
Providing global supply security through structured legal, logistical, and environmental framework operations.
All products, including TPOS and related specialty silanes, undergo rigorous structural testing. Shandong Boctok Chemical Co. supports full registration and documentation pathways under international regulations, including REACH compliance in Europe, GHS-certified Material Safety Data Sheets (MSDS), SGS laboratory inspections, and local customs documentation for the Russian Federation.
Our manufacturing complex at Shouguang Bohai Chemical Park is integrated with green-engineering waste control loops. By installing state-of-the-art waste gas absorption columns and closed-circuit wastewater neutralization facilities, we maintain the highest eco-safety ratings, protecting production cycles from environmental shutdowns.
Boctok’s future chemical design roadmap aims to achieve ultra-purity (>99.9%) alkoxy silanes for precision semiconductor manufacturing. We are actively investing in vacuum rectification columns and automated catalyst recovery loops, allowing us to decrease impurity counts below 10ppm for sensitive optoelectronic clients.
Comprehensive database of the applications of our chemical range, covering rubbers, coatings, resins, and medical-grade compounds.
Engineered consistency, automated operations, and complete verification at every stage of the logistics loop.
Every single batch of silane coupling agents and petroleum resins undergoes mandatory gas chromatography (GC) and mass spectrometry analysis. This ensures chemical purity matches or exceeds client expectations before leaving our warehouses.
Equipped with computerized Distributed Control Systems (DCS) and Safety Instrumented Systems (SIS). These safety configurations maintain continuous production runs, yielding over 30,000 metric tons of organosilicon annually.
Boctok acts as a tailored corridor for international commerce. We provide 24/7 technical consulting, rapid sampling, and localized multilingual technical support to ensure projects transition seamlessly from R&D to high-scale production.
Utilizing optimized maritime and rail cargo connections out of Qingdao and overland rail corridors traversing Central Asia. We handle inert-gas sealed drum shipments, specialized ISO-tank operations, and customized commercial invoicing to maintain continuous factory inventory flow worldwide.
Providing clear, expert technical answers concerning the procurement, synthesis, and safety parameters of Tetrapropoxysilane.
The main differences lie in the alkyl group chain length. TPOS possesses propyl groups which increase steric hindrance and lower solubility in water. This leads to a slower, more controllable hydrolysis and condensation rate. It is preferred in applications that require a longer pot-life, higher control over film thickness, and minimal cracks in thick-layer sol-gel glass coatings.
Our newly constructed manufacturing plant in Shouguang, Shandong, is equipped with a remote DCS (Distributed Control System) automation setup and SIS (Safety Instrumented System). This removes manual human variation in reactor temperatures, pressure cycles, and catalyst additions. Every container undergoes Gas Chromatography validation, conforming strictly to ISO9001 quality management guidelines.
TPOS is moisture-sensitive and will slowly hydrolyze when exposed to atmospheric humidity, producing propanol. It must be stored in dry, tightly sealed containers under an inert nitrogen blanket. It should be kept in a cool, well-ventilated warehouse away from open flames, heat sources, and strong oxidizers. Operators must wear protective nitrile gloves, safety goggles, and work in spaces equipped with local exhaust ventilation.
We supply TPOS in various industry-standard configurations depending on delivery volumes and handling equipment. Our packaging includes 200L steel drums (net weight 180kg-190kg), 1000L IBC containers, and bulk ISO tanks. All containers are nitrogen-flushed prior to filling to prevent premature hydrolysis and ensure long-term shelf-life.
Yes. Backed by our R&D synthesis labs and our specialized manufacturing infrastructure, we can engineer custom chemical mixtures. We can modify alkoxy chain ratios, blend silanes with specific catalysts, or formulate tailored adhesion promoters to suit specialized coating, rubber, or adhesive operations.
Explore our secondary lineup of high-grade silicone modifiers, catalyst defoamers, and monomeric coupling agents.
Boctok Chemical
