Description

(3-Chloropropyl)Pentamethyldisiloxane is a versatile organosilicon compound featuring a reactive chloropropyl group attached to a pentamethyldisiloxane moiety. This unique structure makes it a valuable intermediate for introducing siloxane functionality into target molecules, enhancing properties like hydrophobicity, lubricity, and thermal stability. It is primarily sought after by R&D chemists and process engineers in the silicone polymer, specialty chemical, and advanced materials sectors for synthesis and surface modification applications.

Application

• Silicone Polymer Modification: A key intermediate for synthesizing functionalized silicone oils, elastomers, and resins, imparting specific properties like adhesion promotion or reactivity.
• Surface Treatment Agent: Used to modify inorganic surfaces (e.g., silica, glass) to create hydrophobic or organophilic coatings.
• Coupling Agent Synthesis: Serves as a precursor for manufacturing silane coupling agents with tailored organic functionality.
• Pharmaceutical & Agrochemical Intermediates: Employed in the synthesis of more complex molecules where the siloxane chain influences bioavailability or environmental persistence.
• Lubricant & Release Agent Formulation: Incorporated into specialty lubricants and mold release agents to improve performance at high temperatures.
• Adhesive & Sealant Additive: Functions as a crosslinking agent or property modifier in high-performance silicone-based adhesives and sealants.

Basic Information

Item	Detail
Product Name	(3-Chloropropyl)Pentamethyldisiloxane
CAS No.	18291-27-5
Molecular Formula	C8H21ClOSi2
Molecular Weight	224.88 g/mol
Synonyms	1-(3-Chloropropyl)-1,1,3,3,3-pentamethyldisiloxane; 3-Chloropropylpentamethyldisiloxane; Chloropropylpentamethyldisiloxane; (3-Chloropropyl)bis(trimethylsiloxy)silane; Silane, [3-(chloropropyl)][bis(trimethylsiloxy)]-; Disiloxane, 1-(3-chloropropyl)-1,1,3,3,3-pentamethyl-; (γ-Chloropropyl)pentamethyldisiloxane
EINECS	Contact for details

Quality Control

Our (3-Chloropropyl)Pentamethyldisiloxane is manufactured under a strict quality management system. Every batch undergoes comprehensive 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 protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from strong bases and incompatible organic solvents. Recommended storage temperature is between 15°C and 25°C. Keep container tightly sealed when not in use to prevent moisture absorption.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Chlorine Content	As per theoretical value
Refractive Index (n20/D)	1.420 - 1.425
Density (g/mL, 25°C)	0.92 - 0.96

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