Description

1,1,3,3-Tetramethyldisiloxane is a versatile organosilicon compound that serves as a fundamental building block in silicone chemistry. Its value lies in its role as a reactive intermediate and chain terminator for synthesizing a wide range of silicone polymers and fluids. This product is essential for manufacturers in the silicone industry, particularly for producing specialty fluids, elastomers, and silane coupling agents.

Application

• Silicone Polymer Synthesis: Acts as a chain-terminating agent or monomer in the production of polydimethylsiloxanes (PDMS) and other silicone polymers.
• Specialty Silicone Fluids: Used to manufacture low molecular weight silicone fluids with specific volatility and viscosity profiles.
• Surface Modification: Serves as a precursor for silane coupling agents that improve adhesion between organic polymers and inorganic surfaces.
• Pharmaceutical Intermediates: Employed in the synthesis of active pharmaceutical ingredients (APIs) and drug delivery systems requiring organosilicon components.
• Hydrophobic Coatings: A key raw material for creating water-repellent surface treatments for textiles, electronics, and construction materials.
• Laboratory Reagent: Utilized in research and development for organometallic chemistry and material science applications.

Basic Information

Item	Details
Product Name	1,1,3,3-Tetramethyldisiloxane
CAS No.	30110-74-8
Molecular Formula	C4H14OSi2
Molecular Weight	134.33 g/mol
Synonyms	1,3-Dihydro-1,1,3,3-tetramethyldisiloxane; Bis(dimethylsilyl) ether; Disiloxane, 1,1,3,3-tetramethyl-; Tetramethyldisiloxane; TMDSO; Dimethylsilyl ether; HMDSO analog; 1,1,3,3-Tetramethyl-1,3-disiloxane
EINECS	250-077-2

Quality Control

Our 1,1,3,3-Tetramethyldisiloxane is produced under stringent quality management systems. Each batch undergoes comprehensive analytical testing, including gas chromatography (GC) for purity and identity verification, to ensure it meets the high standards required for industrial and research applications. Certificates of Analysis (COA) are provided with every shipment and are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, well-ventilated area away from heat sources and incompatible materials. Due to its highly volatile nature, ensure containers are kept tightly sealed when not in use to prevent evaporation and maintain product integrity. Recommended storage temperature is 2-25°C.

Specification

Item	Specification
Appearance	Colorless clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 98.0%
Water Content (KF)	≤ 0.1%
Refractive Index (n20D)	1.3720 - 1.3760
Density (20°C)	0.76 - 0.78 g/mL

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