Description

1-Acetoxy-1,1,3,3,5,5-Hexamethyltrisiloxane is a specialized organosilicon compound featuring a reactive acetoxy group on a short, branched siloxane chain. This structure makes it a valuable intermediate and functional additive, particularly as a versatile silylating agent and cross-linking precursor in advanced material synthesis. It is essential for manufacturers in the silicone, polymer, and specialty chemical industries seeking to modify surface properties or create tailored polymeric networks. Its controlled reactivity allows for precise chemical modifications that enhance product performance.

Application

• Silylating Agent: Used to introduce trimethylsiloxy groups onto organic molecules, alcohols, or surfaces, protecting reactive sites or altering solubility.
• Silicone Cross-linker/Chain Extender: Serves as a reactive component in the synthesis of modified silicone resins, elastomers, and gels, influencing cure kinetics and final material properties.
• Surface Modification: Applied to treat inorganic fillers (e.g., silica, glass) or nanoparticles to improve dispersion and compatibility within polymer matrices.
• Adhesive & Sealant Formulations: Acts as a moisture-curable cross-linking agent in high-performance silicone-based adhesives and sealants.
• Release Coatings: Utilized as a precursor in the production of silicone release liners for labels and tapes.
• Lubricant & Fluid Additive: Incorporated into specialty silicone fluids and lubricants to modify viscosity, thermal stability, and surface activity.
• Pharmaceutical/Agrochemical Intermediates: Employed in the synthesis of active ingredients or prodrugs where siloxane functionality is required.

Basic Information

Product Name	1-Acetoxy-1,1,3,3,5,5-Hexamethyltrisiloxane
CAS No.	139722-91-1
Molecular Formula	C10H28O5Si3
Molecular Weight	312.58 g/mol
Synonyms	Acetoxyhexamethyltrisiloxane; Hexamethyltrisiloxane, 1-acetoxy-; 1,1,1,3,5,5,5-Heptamethyl-3-acetoxytrisiloxane; Trisiloxane, 1-acetoxy-1,1,3,3,5,5-hexamethyl-; Acetic acid (hexamethyltrisiloxanyl) ester; HMTS-Acetate; Silylating Agent HMTS-OAc
EINECS	Contact for details

Quality Control

Our production of 1-Acetoxy-1,1,3,3,5,5-Hexamethyltrisiloxane adheres to stringent quality management protocols. Each batch undergoes rigorous analytical testing, including GC (Gas Chromatography) and NMR (Nuclear Magnetic Resonance) spectroscopy, to verify identity, purity, and consistency. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing key specifications such as assay, moisture content, and impurity profiles. Our commitment to supply chain reliability and batch-to-batch consistency ensures you receive a product that meets your precise technical requirements.

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). Keep the container tightly sealed under an inert atmosphere (e.g., nitrogen or argon) to prevent degradation from atmospheric moisture. Isolate from strong acids, bases, and oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Water Content (Karl Fischer)	≤ 0.1%
Density (at 20°C)	~0.95 g/mL
Refractive Index (n20D)	~1.395

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