Description

3-(3-Chloropropyl)-1,1,1,3,5,5,5-Heptamethylpentanetrisiloxane is a functional organosilicon compound featuring a reactive chloropropyl group on a trisiloxane backbone. This unique structure makes it a valuable intermediate for introducing siloxane functionality into polymers and surfaces, enhancing properties like hydrophobicity, lubricity, and release. It is primarily sought after by manufacturers in the silicone industry for the synthesis of specialty silicone fluids, resins, and as a coupling agent or surface modifier.

Application

• Silicone Intermediate: A key building block for synthesizing modified silicone oils, resins, and elastomers.
• Coupling Agent: Used to improve adhesion between organic polymers and inorganic surfaces or fillers.
• Surface Modification: Imparts hydrophobic and release characteristics to textiles, paper, and various substrates.
• Lubricant & Additive Precursor: Serves as a precursor for creating specialized silicone-based lubricants and performance additives.
• Crosslinking Agent: Utilized in the formulation of crosslinkable silicone systems for coatings and sealants.
• Personal Care Ingredients: Intermediate in the production of silicone quats and other conditioning agents for hair and skin care products.

Basic Information

Product Name	3-(3-Chloropropyl)-1,1,1,3,5,5,5-Heptamethylpentanetrisiloxane
CAS No.	17988-66-8
Molecular Formula	C13H33ClO2Si3
Molecular Weight	353.11 g/mol
Synonyms	Chloropropylheptamethyltrisiloxane; 1,1,1,3,5,5,5-Heptamethyl-3-(3-chloropropyl)trisiloxane; 3-Chloropropylheptamethyltrisiloxane; Trisiloxane, 1,1,1,3,5,5,5-heptamethyl-3-(3-chloropropyl)-; (3-Chloropropyl)heptamethyltrisiloxane; Heptamethyl(3-chloropropyl)trisiloxane; Silane, chloropropyltrisiloxanyl-; Dow Corning® Q3-7178 (example trade name)
EINECS	Contact for details

Quality Control

Our production of 3-(3-Chloropropyl)-1,1,1,3,5,5,5-Heptamethylpentanetrisiloxane adheres to stringent quality management protocols. Every batch is analyzed to ensure consistent purity and performance, with key parameters verified by modern analytical techniques. Certificates of Analysis (COA) detailing assay, identity, and impurity profiles are provided to guarantee compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from incompatible materials such as strong bases. Recommended storage temperature is between 15°C and 25°C. The product is moisture-sensitive; keep container tightly sealed when not in use.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 95.0%
Chlorine Content	9.5 - 10.5 %
Refractive Index (n20/D)	1.410 - 1.420
Density (25°C)	0.95 - 1.00 g/mL

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