Description

Tetramethyl-1,3-Dimethoxydisiloxane is a versatile organosilicon compound characterized by a disiloxane backbone with methyl and methoxy substituents. This structure makes it a valuable intermediate and functional precursor in advanced silicone synthesis and surface modification technologies. It is primarily sought by manufacturers in the silicone polymers, specialty coatings, and electronics industries for its reactivity and ability to introduce specific functional groups.

Application

• Silicone Polymer Synthesis: A key monomer or chain extender for producing specialty silicone resins, fluids, and elastomers with tailored properties.
• Surface Modification Agent: Used to treat inorganic fillers (like silica) or surfaces to improve compatibility and dispersion in polymer matrices.
• Adhesive & Sealant Formulations: Serves as a cross-linking agent or adhesion promoter in high-performance silicone-based adhesives and sealants.
• Electronics Encapsulation: Employed in the synthesis of silicones for potting and encapsulating electronic components, offering thermal stability and protection.
• Hydrophobic Coatings: Acts as a precursor for creating water-repellent surface treatments on glass, ceramics, and textiles.
• Pharmaceutical & Cosmetic Intermediates: Used in the synthesis of silicone derivatives for controlled-release systems or as ingredients in personal care products.

Basic Information

Product Name	Tetramethyl-1,3-Dimethoxydisiloxane
CAS No.	18187-24-1
Molecular Formula	C6H18O3Si2
Molecular Weight	194.38 g/mol
Synonyms	1,3-Dimethoxy-1,1,3,3-tetramethyldisiloxane; Bis(methoxydimethylsilyl) ether; Dimethoxytetramethyldisiloxane; Methoxy-terminated polydimethylsiloxane dimer; Disiloxane, 1,3-dimethoxy-1,1,3,3-tetramethyl-; Tetramethyl dimethoxydisiloxane; Me2Si(OMe)OSi(OMe)Me2; DMDMS
EINECS	Contact for details

Quality Control

Our Tetramethyl-1,3-Dimethoxydisiloxane is produced under stringent quality management systems. Each batch undergoes rigorous analytical testing, including GC, NMR, and Karl Fischer titration, 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 protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This material is moisture-sensitive (hygroscopic) and should be kept under an inert atmosphere (e.g., nitrogen) for long-term storage to prevent hydrolysis. Keep away from strong acids, bases, and oxidizing agents.

Specification

Item	Specification
Appearance	Colorless clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 98.0%
Water Content (KF)	≤ 0.1%
Refractive Index (n20D)	1.380 - 1.385
Density (20°C)	0.88 - 0.92 g/mL

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