Description

Triethyltrimethyldisiloxane is a highly volatile organosilicon compound characterized by its unique disiloxane backbone with ethyl and methyl substituents. This structure makes it a valuable intermediate and functional fluid in advanced silicone chemistry, offering a balance of reactivity and volatility. It is primarily utilized by manufacturers in the silicone polymer, electronics, and specialty chemical industries for applications requiring precise molecular control and surface modification.

Application

• Silicone Intermediate: A key building block for the synthesis of custom silicone oils, resins, and elastomers with tailored properties.
• Surface Treatment Agent: Used to impart hydrophobic or release characteristics to surfaces in coatings and textiles.
• Coupling Agent/Crosslinker: Functions in sealant and adhesive formulations to improve adhesion and network formation.
• Electronics Manufacturing: Serves as a precursor or processing aid in the production of semiconductor materials and protective layers.
• Lubricant & Heat Transfer Fluid: Employed as a base or additive in high-performance, thermally stable functional fluids.
• Pharmaceutical & Agrochemical Synthesis: Acts as a protecting group or reagent in the synthesis of active ingredients.
• Research & Development: Used in laboratories for method development and as a standard in analytical chemistry.

Basic Information

Product Name	Triethyltrimethyldisiloxane
CAS No.	74645-92-4
Molecular Formula	C7H20OSi2
Molecular Weight	176.41 g/mol
Synonyms	1,1,1,3,3-Pentamethyl-3-ethyldisiloxane; Disiloxane, 1-ethyl-1,1,3,3,3-pentamethyl-; Ethylpentamethyldisiloxane; Triethyltrimethyl disiloxane; 1-Ethylpentamethyldisiloxane; Ethyl-pentamethyl-disiloxane; EINECS 278-050-5
EINECS	278-050-5

Quality Control

Our Triethyltrimethyldisiloxane is produced under strict quality management systems. Each batch undergoes rigorous analytical testing, including GC and NMR analysis, to ensure high purity and consistent performance. Certificates of Analysis (COA) detailing purity, identity, and specific 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, well-ventilated area away from heat sources and open flame. 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%
Density (20°C)	0.78 - 0.82 g/mL
Refractive Index (20°C)	1.385 - 1.395

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