Description

Octacosamethylcyclotetradecasiloxane is a high molecular weight cyclic siloxane, specifically a tetradecamer, known for its unique polymeric structure and thermal stability. This compound serves as a critical intermediate and functional additive in the production of advanced silicone polymers and specialty materials. It is essential for manufacturers in the silicone elastomer, personal care, and high-performance lubricant industries seeking to enhance product durability and performance under demanding conditions.

Application

• Silicone Polymer Intermediate: A key building block for synthesizing high-consistency rubber (HCR) and other cross-linked silicone polymers.
• Personal Care Formulations: Used as an emollient and conditioning agent in premium cosmetics, hair care products, and skin creams for a smooth, non-greasy feel.
• Specialty Lubricants & Greases: Imparts excellent thermal stability and low volatility in high-temperature lubricants for automotive and aerospace applications.
• Release Agents & Molding: Acts as a high-performance internal or external release agent in plastic and rubber molding processes.
• Electrical Insulation: Employed in the formulation of potting compounds and encapsulants due to its dielectric properties.
• Surface Treatment & Coatings: Provides water repellency and surface modification for textiles, paper, and construction materials.

Basic Information

Product Name	Octacosamethylcyclotetradecasiloxane
CAS No.	149050-40-8
Molecular Formula	C28H84O14Si14
Molecular Weight	1035.1 g/mol
Synonyms	Cyclotetradecasiloxane, octacosamethyl-; D14 Cyclic Siloxane; Tetradecamethylcycloheptasiloxane Homolog; Octacosamethylcyclotetradecasiloxane; Cyclic Volatile Methylsiloxane (cVMS) D14; 2,2,4,4,6,6,8,8,10,10,12,12,14,14-Tetradecaoxa-1,3,5,7,9,11,13,14-octasilapentadecane, 1,1,3,3,5,5,7,7,9,9,11,11,13,13-tetradecamethyl-; Decamethylcyclopentasiloxane Dimer
EINECS	Contact for details

Quality Control

Our Octacosamethylcyclotetradecasiloxane is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure high purity, consistent composition, and reliable performance. Certificates of Analysis (COA) detailing key specifications such as assay, identity, and 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, dry, and well-ventilated area at room temperature (15-25°C). Keep away from strong acids, bases, and oxidizing agents. For long-term storage, consider an inert atmosphere to maintain product integrity.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 95.0%
Refractive Index (n20D)	1.395 - 1.405
Density (20°C)	0.95 - 0.98 g/cm³
Volatile Matter	≤ 1.0%

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