Description

3-Chloropropyltrimethoxysilane is a bifunctional organosilicon compound featuring a reactive chloropropyl group and three hydrolyzable methoxy groups. This unique structure makes it an essential coupling agent and surface modifier, bridging organic polymers with inorganic materials. It is a critical raw material for manufacturers in the adhesives, sealants, coatings, and advanced composite materials industries, where enhanced bonding, durability, and performance are required.

Application

• Silane Coupling Agent: Used to improve the adhesion between mineral-filled composites (like fiberglass, silica) and organic polymer matrices (epoxy, polyester, polyurethane).
• Surface Treatment: Modifies the surface of glass, metals, and minerals to increase hydrophobicity, improve dispersion, and enhance compatibility with resins.
• Intermediate for Synthesis: Serves as a key precursor in the production of other functional silanes, such as aminosilanes, by nucleophilic substitution of the chlorine atom.
• Adhesives & Sealants: Incorporated to enhance moisture resistance, thermal stability, and the bond strength of silicone-based and hybrid polymer formulations.
• Filler Treatment: Treats inorganic fillers (e.g., clay, talc, calcium carbonate) in plastics and rubber to reduce viscosity, improve mechanical properties, and prevent filler agglomeration.
• Crosslinking Agent: Functions as a crosslinker in silicone polymers, contributing to the formation of stable, three-dimensional networks.

Basic Information

Item	Detail
Product Name	3-Chloropropyltrimethoxysilane
CAS No.	2530-87-2
Molecular Formula	C6H15ClO3Si
Molecular Weight	198.72 g/mol
Synonyms	(3-Chloropropyl)trimethoxysilane; Chloropropyltrimethoxysilane; 3-Chloropropyltrimethoxy silane; γ-Chloropropyltrimethoxysilane; Trimethoxy(3-chloropropyl)silane; Silane, trimethoxy(3-chloropropyl)-; Dynasylan® CPTMO; KH-Cl930; A-143
EINECS	219-785-8

Quality Control

Our production of 3-Chloropropyltrimethoxysilane adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. Each lot is analyzed against comprehensive specifications using advanced techniques like gas chromatography (GC). A Certificate of Analysis (COA) detailing purity, identity, and key physical properties is provided with every shipment to support your quality assurance and regulatory compliance needs.

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 product is hygroscopic (moisture-sensitive); containers must be kept tightly sealed to prevent contact with atmospheric moisture, which can lead to hydrolysis.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms
Purity (GC)	≥ 97.0%
Refractive Index (n20D)	1.418 - 1.422
Density (20°C)	1.075 - 1.085 g/mL
Chlorine Content	17.5 - 18.5 %

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