Description

Cyclopentyltrimethoxysilane is a specialized organosilicon compound, a key intermediate in the synthesis of advanced silicone materials and surface modifiers. Its value lies in the unique reactivity of the trimethoxysilane group coupled with the hydrophobic cyclopentyl moiety, enabling precise control over material properties. This product is essential for manufacturers in the silicone polymers, coatings, and adhesives industries seeking to enhance performance characteristics such as hydrophobicity, adhesion, and thermal stability.

Application

• Silicone Resin & Polymer Modification: Used as a functional monomer or cross-linking agent to introduce cyclopentyl groups, improving hydrophobicity and chemical resistance in silicone elastomers and resins.
• Surface Treatment & Coupling Agent: Acts as an adhesion promoter and hydrophobic agent for inorganic fillers (e.g., silica, glass fibers) in composite materials and coatings.
• Synthesis of Silane Precursors: Serves as a key intermediate for manufacturing more complex silanes used in pharmaceutical, agrochemical, and electronic chemical applications.
• Waterproofing & Protective Coatings: Imparts durable water repellency and protective properties to stone, concrete, and textile surfaces.
• Adhesive & Sealant Formulations: Enhances adhesion to difficult substrates and improves the flexibility and durability of silicone-based sealants.
• Electronic Encapsulants: Used in the formulation of silicone gels and encapsulants for electronic components, providing moisture protection and stability.

Basic Information

Product Name	Cyclopentyltrimethoxysilane
CAS No.	143487-47-2
Molecular Formula	C8H18O3Si
Molecular Weight	190.31 g/mol
Synonyms	Cyclopentyltrimethoxysilane; Trimethoxy(cyclopentyl)silane; Cyclopentyl(trimethoxy)silane; Cyclopentyl-trimethoxysilan; (Cyclopentyl)trimethoxysilane; Silane, trimethoxycyclopentyl-; CP-TMS
EINECS	Contact for details

Quality Control

Our Cyclopentyltrimethoxysilane is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including GC, NMR, and Karl Fischer titration, to ensure high purity and consistency. A comprehensive Certificate of Analysis (COA) detailing identity, assay, and impurity profiles 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). Due to its hygroscopic (moisture-sensitive) nature, containers must be kept tightly sealed under a dry inert atmosphere (e.g., nitrogen) after opening to prevent hydrolysis and maintain product integrity.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms
Assay (GC)	≥ 97.0%
Water Content (KF)	≤ 0.5%
Refractive Index (n20D)	1.410 - 1.420
Density (20°C)	0.95 - 0.98 g/mL

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