Description

Tris[Tris(Trimethylsiloxy)Siloxy]Methylsilane CAS NO 3360-32-5 is a highly functionalized organosilicon compound, specifically a branched siloxane with multiple reactive sites. This complex structure is engineered to deliver superior performance as a versatile chemical intermediate and functional additive. It is essential for manufacturers in the silicone polymer, advanced materials, and specialty chemical sectors seeking to enhance product properties such as hydrophobicity, thermal stability, and surface modification.

Application

• Silicone Resin & Polymer Modification: Acts as a key branching agent or crosslinker to create highly branched or hyperbranched silicone polymers with tailored rheological and mechanical properties.
• Surface Treatment & Coatings: Imparts exceptional water repellency (hydrophobicity) and release properties to surfaces, textiles, paper, and construction materials.
• Specialty Additives: Used as a compatibilizer or processing aid in high-performance plastics, rubbers, and composites to improve dispersion and interfacial adhesion.
• Precursor for Advanced Materials: Serves as a sophisticated molecular building block (precursor) for synthesizing silsesquioxanes (POSS) and other nanostructured hybrid organic-inorganic materials.
• Personal Care & Cosmetics: Functions as a volatile carrier or emollient in high-end cosmetic formulations, providing a non-greasy, smooth feel.
• Adhesives & Sealants: Enhances the flexibility, moisture resistance, and adhesion properties of silicone-based adhesive and sealant formulations.

Basic Information

Product Name	Tris[Tris(Trimethylsiloxy)Siloxy]Methylsilane
CAS No.	3360-32-5
Molecular Formula	C28H78O12Si13
Molecular Weight	1037.07 g/mol
Synonyms	Methyltris[tris(trimethylsiloxy)siloxy]silane; Trisiloxane, 1,1,1,3,5,5,5-heptamethyl-3-[tris(trimethylsiloxy)silyl]oxy]-; T2910; MQ Resin Intermediate; Hyperbranched Siloxane Precursor; Heptamethyltrisiloxanyl Modified Silane; Contact for details on additional trade names.
EINECS	Contact for details

Quality Control

Our Tris[Tris(Trimethylsiloxy)Siloxy]Methylsilane is produced under stringent quality management systems. Each batch undergoes rigorous analytical testing, including chromatography (GC/HPLC) and spectroscopic methods (FT-IR, NMR), to ensure high purity and consistent performance. Certificates of Analysis (COA) detailing identity, assay, and impurity profiles are available upon request to support your quality assurance and regulatory needs.

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.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 95.0%
Water Content (KF)	≤ 0.5%
Refractive Index (n20D)	1.3900 - 1.4100
Density (g/mL at 20°C)	0.95 - 1.05

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