Description

1,1,1,2,3,3,3-Heptamethylacetoxytrisiloxane is a specialized organosilicon compound, specifically a functionalized trisiloxane, known for its unique reactivity and properties. This chemical serves as a valuable intermediate and functional additive in advanced material synthesis, offering controlled reactivity for precise chemical modifications. It is primarily utilized by manufacturers in the silicone polymer, specialty coatings, and personal care industries seeking to enhance product performance through tailored siloxane chemistry.

Application

• Silicone Resin & Polymer Modification: Acts as a reactive intermediate or end-capping agent to introduce specific functional groups, modifying the properties of silicone polymers for improved flexibility, adhesion, or compatibility.
• Crosslinking Agent: Used in the formulation of room-temperature vulcanizing (RTV) silicones and other crosslinkable systems where the acetoxy group provides controlled curing characteristics.
• Surface Treatment & Coupling Agent: Imparts hydrophobic or specific surface properties to inorganic materials like silica, glass, or minerals, enhancing dispersion in organic matrices.
• Specialty Additive for Coatings: Incorporated into high-performance coatings to improve weatherability, moisture resistance, and surface slip.
• Intermediate for Further Synthesis: Serves as a key building block for the synthesis of more complex, custom organosilicon molecules in pharmaceutical and agrochemical research.
• Release Agents & Moldmaking: Used in formulations for mold release applications due to its ability to form thin, non-stick films.

Basic Information

Product Name	1,1,1,2,3,3,3-Heptamethylacetoxytrisiloxane
CAS No.	72403-64-6
Molecular Formula	C11H30O4Si3
Molecular Weight	322.62 g/mol
Synonyms	Acetoxyheptamethyltrisiloxane; Heptamethylacetoxytrisiloxane; Trisiloxane, 1,1,1,2,3,3,3-heptamethyl-, 2-acetate; 2-Acetoxy-1,1,1,3,3,3-hexamethyl-2-(trimethylsilyl)trisiloxane; MD'M acetate (common industry notation); Acetoxy-terminated heptamethyltrisiloxane
EINECS	Contact for details

Quality Control

Our production of 1,1,1,2,3,3,3-Heptamethylacetoxytrisiloxane adheres to stringent quality management protocols. Each batch undergoes rigorous analytical testing, including GC, NMR, and titration methods, to ensure high purity and consistent performance. Comprehensive Certificates of Analysis (COA) detailing purity, identity, and key physical parameters are provided to guarantee traceability and compliance with your 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. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Density (at 20°C)	0.95 - 0.98 g/mL
Refractive Index (n20D)	1.390 - 1.400

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