Description

p-Tolylmethyldichlorosilane (CAS NO 25898-37-7) is a versatile organosilicon intermediate characterized by its reactive dichlorosilane group and aromatic tolyl substituent. This compound is essential for introducing the p-tolylmethylsilyl moiety into more complex molecular architectures, enabling precise control over material properties. It is primarily sought by manufacturers in the silicone polymer, advanced material science, and pharmaceutical sectors for creating specialized silanes, surface modifiers, and silicon-containing building blocks.

Application

• Silicone Resin & Polymer Modification: Serves as a key monomer or cross-linking agent for synthesizing specialty silicone resins with enhanced thermal stability and specific refractive indices.
• Surface Treatment & Coupling Agents: Used to manufacture silane coupling agents that improve adhesion between organic polymers and inorganic surfaces like glass, metals, or minerals.
• Pharmaceutical & Agrochemical Intermediates: Acts as a protected silicon-based building block in the synthesis of active pharmaceutical ingredients (APIs) and advanced agrochemicals.
• Hydrophobic Coatings: A precursor for developing water-repellent and release coatings for textiles, paper, and construction materials.
• Advanced Material Synthesis: Employed in research and production of hybrid organic-inorganic materials (Ormosils), silsesquioxanes, and other nanostructured materials.
• Rubber & Elastomer Additives: Imparts specific processing or performance characteristics when incorporated into silicone rubber formulations.

Basic Information

Product Name	p-Tolylmethyldichlorosilane
CAS No.	25898-37-7
Molecular Formula	C8H10Cl2Si
Molecular Weight	205.16 g/mol
Synonyms	Dichloro(methyl)(4-methylphenyl)silane; (4-Methylphenyl)methyldichlorosilane; Methyl-p-tolyldichlorosilane; p-Tolylmethylsilyl dichloride; 1-Methyl-4-(dichloromethylsilyl)benzene; Dichloro(methyl)(p-tolyl)silane; Methyl(4-methylphenyl)dichlorosilane
EINECS	Contact for details

Quality Control

Our p-Tolylmethyldichlorosilane is produced under stringent quality management systems. Every batch undergoes rigorous analytical testing, including GC, NMR, and titration methods, to ensure high purity and consistent performance. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are available upon request to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Due to its hygroscopic and highly volatile nature, containers must be kept tightly sealed under an inert atmosphere (e.g., nitrogen or argon) to prevent moisture absorption and decomposition. Keep away from heat, sparks, open flames, and incompatible materials such as strong bases, acids, and oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Density (at 20°C)	~1.15 g/cm³
Refractive Index (n20D)	~1.510 - 1.520
Chloride Content	Theoretical

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