Description

Bis(Trimethylsiloxy)Methylmethoxysilane is a specialized organosilicon compound, also known as a silane coupling agent. This chemical is valued for its ability to modify surfaces and act as a crosslinking agent, enhancing adhesion and compatibility between organic polymers and inorganic materials. It is a critical raw material for manufacturers in the silicone rubber, sealant, adhesive, and advanced coatings industries seeking to improve product performance and durability.

Application

• As a key crosslinking agent in the production of room-temperature vulcanizing (RTV) silicone rubbers and sealants.
• As a surface modifier and coupling agent for inorganic fillers (e.g., silica, glass) to improve their dispersion and bonding within polymer matrices.
• In the formulation of high-performance release coatings and pressure-sensitive adhesives.
• As an intermediate in the synthesis of more complex silicone resins and functional silanes.
• For enhancing the water repellency and durability of construction materials and stone protectants.
• In the electronics industry for encapsulation materials and protective coatings.

Basic Information

Product Name	Bis(Trimethylsiloxy)Methylmethoxysilane
CAS No.	7671-19-4
Molecular Formula	C8H24O3Si3
Molecular Weight	252.53 g/mol
Synonyms	Methylmethoxybis(trimethylsiloxy)silane; Methoxymethylbis(trimethylsiloxy)silane; 1-Methoxy-1-methyl-1,1-bis(trimethylsiloxy)silane; Bis(trimethylsiloxy)methylmethoxysilane; Silane, methoxymethylbis(trimethylsiloxy)-; (Methoxymethyl)bis(trimethylsiloxy)silane; A-163; SC-3001
EINECS	231-637-2

Quality Control

Our Bis(Trimethylsiloxy)Methylmethoxysilane is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including gas chromatography (GC), to ensure high purity and consistency. A comprehensive Certificate of Analysis (COA) detailing assay, identity, and impurity profiles is provided with every shipment to guarantee compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area. Due to its hygroscopic (moisture-sensitive) nature, containers must be kept tightly sealed and under a dry inert atmosphere (e.g., nitrogen) after opening to prevent hydrolysis and maintain product integrity. Recommended storage temperature is 2-25°C.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 98.0%
Density (at 20°C)	0.88 - 0.92 g/cm³
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.