Phenyltrichlorosilane (PTS) Bulk Supply & Technical Specs
Phenyltrichlorosilane (CAS 98-13-5): Technical Specifications and Purity Grades
Phenyltrichlorosilane (PTS), also referred to as trichloro(phenyl)silane or silane trichlorophenyl, is a cornerstone organosilicon intermediate with the linear formula C6H5Cl3Si. As a leading global manufacturer, NINGBO INNO PHARMCHEM supplies this monomer in multiple purity tiers to accommodate diverse industrial applications—from silicone resin synthesis to advanced optical materials. Our standard offering includes a 98% minimum assay grade, suitable for most bulk polymerizations, and a high-purity grade exceeding 99% for catalyst-sensitive processes. The synthesis route typically involves direct reaction of chlorobenzene with silicon in the presence of a copper catalyst, yielding a product that must be carefully fractionated to remove residual chlorosilanes. For applications requiring ultra-low metal content, we can provide material with iron below 10 ppm and aluminum below 5 ppm, critical for electronic-grade silicone encapsulants. The table below summarizes our typical product specifications; however, please refer to the batch-specific COA for exact values.
| Parameter | Standard Grade | High-Purity Grade |
|---|---|---|
| Assay (GC, %) | ≥ 98.0 | ≥ 99.0 |
| Boiling Point (°C) | 201 | 201 |
| Density (g/mL at 25°C) | 1.321 | 1.321 |
| Refractive Index (nD20) | 1.524 | 1.524 |
| Hydrolyzable Chlorine (%) | 50.0–50.5 | 50.0–50.5 |
| Iron (ppm) | ≤ 20 | ≤ 10 |
Our industrial purity material is routinely used as a silicone resin precursor for high-temperature coatings and water-repellent treatments. For customers seeking a seamless drop-in replacement for major brands, we ensure identical reactivity profiles and compatibility with existing formulations. Explore our product page for detailed specifications: Phenyltrichlorosilane high-purity organosilicon intermediate for resins.
Certificate of Analysis (COA) Parameters: Assay, Boiling Point, and Impurity Profiles
Every shipment of Phenyltrichlorosilane from NINGBO INNO PHARMCHEM is accompanied by a comprehensive COA that documents critical quality attributes. The assay, determined by gas chromatography, confirms the concentration of the main component, while the boiling point range (typically 200–202°C at 760 mmHg) serves as a rapid identity check. Impurity profiling is where our quality assurance truly differentiates us. We quantify residual chlorosilanes—such as diphenyldichlorosilane and phenylmethyldichlorosilane—which can act as chain terminators or crosslinkers, altering resin architecture. For optical-grade applications, we monitor trace metals that could cause discoloration or catalyst poisoning. A typical COA includes:
- Appearance: Colorless to pale yellow transparent liquid
- Assay (GC): ≥ 99.0%
- Boiling Point: 201°C
- Density (20°C): 1.321 g/mL
- Refractive Index (nD20): 1.524
- Hydrolyzable Chlorine: 50.0–50.5%
- Individual Impurity (GC): ≤ 0.5%
- Iron (ICP): ≤ 10 ppm
For customers requiring a drop-in replacement for Gelest SIP6810, we provide a cross-reference COA demonstrating equivalence in purity and reactivity. Read our detailed comparison: Drop-in replacement for Gelest SIP6810: Phenyltrichlorosilane COA cross-reference.
Industrial Handling and Bulk Packaging: IBC Totes, 210L Drums, and Moisture-Sensitive Logistics
Phenyltrichlorosilane is a moisture-sensitive liquid that reacts violently with water, releasing hydrogen chloride gas. Therefore, all packaging must be hermetically sealed under dry nitrogen. Our standard bulk offerings include 210L steel drums (net weight 200 kg) and 1000L IBC totes (net weight 1000 kg). For large-volume consumers, we can arrange ISO tank containers with dedicated return logistics. Each container is purged and pressurized with nitrogen to maintain a moisture-free environment during transit. We do not claim EU REACH compliance; our logistics focus strictly on physical packaging integrity. Our team has extensive field experience in managing the exothermic nature of this product during loading and unloading, especially in humid climates. We recommend storing PTS in a cool, dry area away from incompatible materials such as strong bases and oxidizing agents. Shelf life is 12 months under proper storage conditions.
Non-Standard Parameter: Viscosity Behavior and Crystallization Control in Sub-Ambient Conditions
While standard specifications focus on assay and boiling point, field experience reveals that viscosity shifts at sub-zero temperatures can significantly impact processability. Pure Phenyltrichlorosilane has a melting point of approximately -40°C, but the presence of trace impurities—particularly diphenyldichlorosilane—can elevate the freezing point and lead to crystal formation in unheated storage tanks or during winter transport. This crystallization can clog feed lines and cause metering inaccuracies in continuous processes. To mitigate this, we offer a winter-grade variant with a controlled impurity profile that depresses the freezing point without compromising reactivity. Additionally, we advise customers in cold regions to maintain storage temperatures above 0°C and to recirculate the liquid periodically. Our technical support team can provide viscosity-temperature curves for your specific purity grade upon request. This hands-on knowledge ensures uninterrupted production, even in challenging environments.
Drop-in Replacement Strategy: Cost Efficiency and Supply Chain Reliability for Phenyltrichlorosilane
For manufacturers currently sourcing Phenyltrichlorosilane from established Western or Japanese suppliers, NINGBO INNO PHARMCHEM offers a compelling drop-in replacement strategy. Our product matches the technical parameters—assay, density, refractive index, and hydrolyzable chlorine content—of leading brands, ensuring identical performance in silicone resin synthesis, optical compounds, and surface treatments. The key advantages are cost efficiency and supply chain reliability. By leveraging our integrated manufacturing platform and strategic raw material sourcing, we can offer competitive bulk prices without sacrificing quality. Moreover, our dual-plant production capability and safety stock of 50 metric tons provide a buffer against market volatility. We understand that switching suppliers requires rigorous validation; therefore, we provide complimentary sample kits and COA cross-references to streamline your qualification process. For applications in high-refractive-index optical compounds, where catalyst poisoning by trace impurities is a critical concern, our high-purity grade has been proven to eliminate such issues. Learn more about this application: Фенилтрихлорсилан в оптических компаундах: решения проблемы отравления катализатора.
Frequently Asked Questions
What is the minimum order quantity (MOQ) for Phenyltrichlorosilane?
Our standard MOQ is 200 kg (one 210L drum) for sample orders and 1 metric ton for regular supply. For trial purposes, we can accommodate smaller quantities upon request.
What is the typical lead time for bulk orders?
Lead time is 2–4 weeks for drum quantities and 4–6 weeks for IBC totes or ISO tanks, depending on current production schedules and shipping destination.
Do you provide technical data sheets and COAs before shipment?
Yes, a preliminary COA is provided with every quotation, and a final batch-specific COA accompanies each shipment. Additional documentation, such as safety data sheets (SDS) and analytical methods, is available upon request.
Can you customize the packaging or labeling?
We offer neutral packaging with your company’s label upon approval. Custom packaging, such as smaller containers or specific drum linings, can be arranged for an additional fee.
What payment terms do you accept?
We typically require 100% T/T in advance for new customers. For established relationships, we can negotiate 30% deposit and 70% against copy of documents, or irrevocable L/C at sight.
Is Phenyltrichlorosilane classified as dangerous goods for transport?
Yes, it is classified as UN 1804, Class 8 (corrosive), Packing Group II. All shipments comply with IMDG, IATA, and ADR regulations.
Sourcing and Technical Support
At NINGBO INNO PHARMCHEM, we combine deep chemical expertise with responsive customer service to support your Phenyltrichlorosilane requirements. Whether you need a single drum for R&D or multiple tons for continuous production, our team ensures consistent quality and reliable delivery. We invite you to leverage our technical support for process optimization, impurity troubleshooting, or logistics planning. Ready to optimize your supply chain? Reach out to our logistics team today for comprehensive specifications and tonnage availability.