Description

1,3-Dimethyltetramethoxydisiloxane is a versatile organosilicon compound characterized by its disiloxane backbone with methoxy and methyl substituents. This structure makes it a valuable intermediate and precursor in the synthesis of more complex siloxanes and silicone-based materials. It is primarily sought after by manufacturers in the silicone polymer, specialty chemical, and advanced materials sectors for its reactivity and functional groups.

Application

• Silicone Resin & Polymer Intermediate: A key building block for the synthesis of cross-linked silicone resins, elastomers, and modified siloxanes.
• Surface Treatment & Coupling Agent: Used to modify inorganic surfaces like glass, silica, or metals, improving adhesion and compatibility in composite materials.
• Precursor for Specialty Silanes: Serves as a starting material in the production of other functional organosilanes through transesterification or hydrolysis-condensation reactions.
• Hydrophobic Coatings: Imparts water-repellent properties to surfaces in protective coating formulations.
• Adhesive & Sealant Formulations: Acts as a cross-linking agent or modifier to enhance the performance of silicone-based adhesives and sealants.
• Electronic Encapsulants: Used in the formulation of silicones for potting and protecting sensitive electronic components.

Basic Information

Product Name	1,3-Dimethyltetramethoxydisiloxane
CAS No.	18186-97-5
Molecular Formula	C6H18O5Si2
Molecular Weight	226.38 g/mol
Synonyms	Bis(methoxydimethylsilyl) ether; Dimethoxydimethylsiloxane; Tetramethoxy-1,3-dimethyldisiloxane; 1,3-Dimethyl-1,1,3,3-tetramethoxydisiloxane; Disiloxane, 1,3-dimethyl-1,1,3,3-tetramethoxy-; Me2Si(OMe)2OSi(OMe)2Me2
EINECS	Contact for details

Quality Control

Our production of 1,3-Dimethyltetramethoxydisiloxane adheres to stringent quality control protocols to ensure batch-to-batch consistency and high purity. Each lot is analyzed using advanced techniques including GC, NMR, and Karl Fischer titration. Certificates of Analysis (COA) detailing purity, identity, and key physical parameters are 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, and well-ventilated area at room temperature (15-25°C). Due to its hygroscopic and highly volatile nature, containers must be kept tightly sealed under an inert atmosphere (e.g., nitrogen or argon) after opening to prevent moisture absorption and degradation. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Water Content (KF)	≤ 0.1%
Density (20°C)	~1.00 g/cm³
Refractive Index (n20D)	~1.385

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