Description

Hexaethyldisiloxane is a highly volatile organosilicon compound with the CAS number 994-49-0, widely recognized as a versatile chemical intermediate and functional fluid. Its value lies in its unique chemical structure, which provides excellent thermal stability and hydrophobic properties, making it a critical component in advanced material synthesis. This product is essential for manufacturers in the silicone polymer, electronics, and specialty chemical industries seeking to enhance product performance and process efficiency.

Application

• Silicone Polymer Synthesis: Acts as a chain extender, endblocker, or cross-linking agent in the production of polydimethylsiloxanes (PDMS) and other specialty silicone fluids and elastomers.
• Surface Modification Agent: Used to impart hydrophobic and oleophobic properties to glass, silica, and other inorganic surfaces in coatings and composites.
• Electronics Industry: Serves as a precursor for spin-on-glass (SOG) materials and dielectric layers in semiconductor manufacturing and microelectronics.
• Chemical Intermediate: A key starting material for synthesizing more complex organosilicon compounds, including silanes and siloxanes with specific functional groups.
• Lubricant & Heat Transfer Fluid: Employed as a base or additive in high-performance lubricants and thermal fluids due to its stability over a wide temperature range.
• Adhesive & Sealant Formulations: Functions as a reactive diluent or modifier to control viscosity and cure characteristics in silicone-based adhesives and sealants.
• Pharmaceutical & Cosmetic Intermediates: Used in the synthesis of siloxane-based excipients and ingredients for controlled-release drug delivery and personal care products.

Basic Information

Product Name	Hexaethyldisiloxane
CAS No.	994-49-0
Molecular Formula	C12H30OSi2
Molecular Weight	246.54 g/mol
Synonyms	1,1,1,3,3,3-Hexaethyldisiloxane; Disiloxane, 1,1,1,3,3,3-hexaethyl-; Bis(triethylsilyl) ether; Triethylsilyl ether; Triethylsiloxane; Et3SiOSiEt3; HEDS; 994-49-0
EINECS	213-619-1

Quality Control

Our Hexaethyldisiloxane is produced under stringent quality management systems to ensure batch-to-batch consistency and high purity. Each lot is analyzed against comprehensive specifications, including identity, assay, and impurity profile, utilizing advanced analytical techniques such as GC, NMR, and Karl Fischer titration. A Certificate of Analysis (COA) detailing all test results 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, well-ventilated area away from heat sources and incompatible materials such as strong acids and oxidizing agents. 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
Assay (GC)	≥ 98.0%
Water Content (KF)	≤ 0.1%
Refractive Index (n20D)	1.420 - 1.424
Density (20°C)	0.82 - 0.86 g/mL
Boiling Point	Approx. 200°C

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