Description

Cyclotetrasiloxane CAS NO 61614-55-9 is a volatile cyclic siloxane monomer, a key building block in silicone chemistry. Its high volatility and reactive siloxane bonds make it an essential intermediate for the synthesis of high-performance silicone polymers and fluids. This product is primarily needed by manufacturers in the personal care, electronics, and specialty chemical industries for creating siloxane-based materials with tailored properties.

Application

• Silicone Polymer Synthesis: A fundamental monomer for the ring-opening polymerization (ROP) to produce polydimethylsiloxane (PDMS) fluids, elastomers, and resins.
• Personal Care & Cosmetics: Used as a volatile carrier or intermediate in the formulation of hair conditioners, skin creams, and antiperspirants, where it provides a non-greasy, smooth feel.
• Electronics & Industrial Coatings: Serves as a precursor for silicone-based dielectric fluids, encapsulants, and protective coatings due to its thermal stability and electrical insulation properties.
• Release Agents & Lubricants: An intermediate in manufacturing silicone release liners for labels and tapes, as well as high-temperature lubricants.
• Chemical Intermediate: Used in further chemical reactions to create modified siloxanes with specific functional groups (e.g., amino, epoxy, phenyl) for advanced material applications.
• Adhesives & Sealants: A key component in formulating silicone adhesives and sealants that require specific viscosity, cure rate, and flexibility.

Basic Information

Product Name	Cyclotetrasiloxane
CAS No.	61614-55-9
Molecular Formula	C8H24O4Si4
Molecular Weight	296.62 g/mol
Synonyms	Octamethylcyclotetrasiloxane; D4; Cyclotetrasiloxane, octamethyl-; OMCTS; Tetramer; Octamethyl-1,3,5,7-tetroxacyclotetrasiloxane; 2,2,4,4,6,6,8,8-Octamethyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane
EINECS	Contact for details

Quality Control

Our Cyclotetrasiloxane is produced under strict quality management systems to ensure batch-to-batch consistency and high purity. Each lot undergoes rigorous analytical testing, including gas chromatography (GC) for assay and impurity profiling. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and physical properties is provided with every shipment 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 15-25°C.

Specification

Item	Specification
Appearance	Colorless clear liquid
Identification (IR)	Conforms
Assay (GC)	≥ 98.0%
Refractive Index (n20D)	1.396 - 1.398
Density (20°C)	0.95 - 0.96 g/cm³
Water Content (KF)	≤ 0.05%

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