What is 3-chloropropyltriethoxysilane and what are its applications?

3-chloropropyltriethoxysilane (CPTES) is an organosilane compound with the chemical formula ClCH2CH2CH2Si(OCH2CH3)3. It belongs to the class of silane coupling agents, which are substances that can form a chemical bond between organic and inorganic materials.


CPTES has a chloropropyl group and three ethoxy groups attached to a silicon atom. The chloropropyl group can react with various nucleophiles, such as alcohols, amines, carboxylic acids, and thiols, to form covalent bonds with organic substrates. The ethoxy groups can hydrolyze in the presence of water and form silanol groups, which can condense with hydroxyl groups on inorganic surfaces, such as glass, metal oxides, and ceramics.


A diagram showing the structure and applications of 3-chloropropyltriethoxysilane
3-chloropropyltriethoxysilane is a silane coupling agent that can be used to modify various bio- and nano-materials. Source: Pengrun.Ltd

By using CPTES as a coupling agent, one can modify the surface properties of different materials and improve their compatibility, adhesion, dispersion, stability, and functionality. Some of the applications of CPTES include:


– Coating glass fibers with CPTES can enhance their bonding strength with epoxy resins and improve the mechanical properties of glass fiber-reinforced composites.

– Immobilizing enzymes on silica nanoparticles with CPTES can increase their activity, stability, and reusability in biocatalysis.

– Functionalizing carbon nanotubes with CPTES can improve their dispersion in organic solvents and polymer matrices and enable their use in nanocomposites, sensors, and energy devices.

– Modifying magnetic nanoparticles with CPTES can provide them with reactive sites for further functionalization and enable their use in biomedical applications, such as drug delivery, imaging, and separation.


CPTES is a versatile silane coupling agent that can be used to modify various bio- and nano-materials and enhance their performance in different fields. If you are looking for high-quality CPTES products at competitive prices, visit Pengrun Ltd. today. Pengrun Ltd. is a leading supplier of organosilicon reagents and other specialty chemicals for research and industry. Contact us now to get a quote or learn more about our products and services.

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