Description

Phenyldiethoxychlorosilane CAS NO 17903-53-6 is a versatile organosilicon compound that serves as a key intermediate in the synthesis of advanced silicone polymers and surface-modifying agents. Its bifunctional reactivity, featuring both hydrolyzable ethoxy and chloro groups, makes it essential for introducing phenyl functionality into siloxane backbones and creating hydrophobic coatings. This product is primarily needed by manufacturers in the silicone elastomer, resin, and specialty chemical industries for developing materials with enhanced thermal stability, refractive index, and water repellency.

Application

• Silicone Intermediate: A crucial monomer for the production of phenyl-modified silicone oils, resins, and elastomers, imparting high-temperature resistance and optical clarity.
• Surface Treatment Agent: Used as a coupling agent or primer to modify the surface of glass, silica, and metals, improving adhesion and moisture resistance in composite materials.
• Hydrophobic Coatings: Serves as a precursor for creating water-repellent and anti-corrosive coatings on various substrates, including construction materials and electronic components.
• Adhesive & Sealant Formulation: Incorporated into formulations to enhance the thermal and chemical stability of high-performance adhesives and sealants.
• Pharmaceutical & Agro-chemical Synthesis: Acts as a protecting group or building block in the synthesis of complex organic molecules for pharmaceutical and agrochemical applications.
• Crosslinking Agent: Utilized in the production of crosslinked silicone networks for release liners, encapsulants, and molded parts.

Basic Information

Product Name	Phenyldiethoxychlorosilane
CAS No.	17903-53-6
Molecular Formula	C10H15ClO2Si
Molecular Weight	230.76 g/mol
Synonyms	Chlorodietoxyphenylsilane; Dietoxyphenylchlorosilane; Phenyldiethoxychlorosilane; Phenylchlorodiethoxysilane; Diethoxyphenylchlorosilane; Phenyl(diethoxyl)chlorosilane; Silane, chlorodietoxyphenyl-; Phenyl diethoxy chlorosilane; (Diethoxychlorosilyl)benzene
EINECS	241-873-3

Quality Control

Our Phenyldiethoxychlorosilane is produced under strict quality management systems to ensure batch-to-batch consistency and high purity. Each lot undergoes rigorous analytical testing, including gas chromatography (GC) for assay and impurity profiling. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and specific parameters is provided with every shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive) and reacts with fluorides/strong alkalis. Keep the container tightly sealed under an inert atmosphere (e.g., nitrogen or argon) to prevent hydrolysis and degradation upon contact with atmospheric moisture.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 98.0 %
Density (at 20°C)	1.05 - 1.10 g/cm³
Refractive Index (n20D)	1.460 - 1.470

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.