Description

Methyltris(Dimethylsiloxy)Silane is a versatile organosilicon compound, specifically a branched siloxane, that serves as a key reactive intermediate and building block in silicone chemistry. Its value lies in its ability to introduce methylsiloxane functionality, enabling the synthesis of complex silicone polymers, resins, and surface-modifying agents. This product is essential for manufacturers and R&D chemists in the silicone elastomer, adhesive, sealant, and specialty coatings industries seeking to tailor material properties like hydrophobicity, flexibility, and thermal stability.

Application

• Crosslinking Agent: Used in the formulation of room-temperature vulcanizing (RTV) silicone rubbers and sealants.
• Silicone Resin Precursor: Serves as a core building block (T-unit) for manufacturing branched and cage-like silicone resins with high thermal stability.
• Surface Modification: Imparts hydrophobic properties to inorganic surfaces like silica, glass, or metals.
• Intermediate for Silicone Fluids: Employed in the synthesis of specialty silicone oils and functional fluids.
• Adhesive & Sealant Formulations: Enhances adhesion and modifies rheological properties in high-performance applications.
• Pharmaceutical & Cosmetic Ingredients: Used as a precursor or intermediate in the synthesis of silicone-based excipients.

Basic Information

Product Name	Methyltris(Dimethylsiloxy)Silane
CAS No.	17082-46-1
Molecular Formula	C7H24O3Si4
Molecular Weight	256.56 g/mol
Synonyms	Methyltris(dimethylsiloxy)silane; Tris(dimethylsiloxy)methylsilane; Methylsilanetriol tris(trimethylsilyl) ether; 1,1,1,3,5,5,5-Heptamethyltrisiloxane; MD'(M)T; Methyl T-structure siloxane; Silane, methyltris[(trimethylsilyl)oxy]-; Tris(trimethylsiloxy)methylsilane
EINECS	241-155-1

Quality Control

Our production of Methyltris(Dimethylsiloxy)Silane adheres to stringent quality protocols to ensure batch-to-batch consistency and high purity. Each lot is analyzed using advanced techniques including Gas Chromatography (GC) and NMR to verify identity and assay. A comprehensive Certificate of Analysis (COA) detailing purity, specific gravity, refractive index, and other critical parameters is provided with every shipment to support your quality assurance processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Due to its highly volatile nature, ensure containers are securely sealed when not in use and stored away from heat sources and open flame. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Refractive Index (n20/D)	1.390 - 1.395
Specific Gravity (20/4°C)	0.88 - 0.92

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