Description

Hexacosamethylcyclotridecasiloxane is a high-purity, cyclic siloxane oligomer, specifically a thirteen-membered ring (D13), known for its exceptional thermal stability and low volatility. This compound serves as a critical intermediate and performance additive, valued for its ability to modify surface properties and enhance material compatibility. It is essential for manufacturers in the silicone polymer, advanced lubricant, and personal care industries seeking to improve product performance and process efficiency.

Application

• Silicone Polymer Intermediate: A key building block for the synthesis of high-molecular-weight polydimethylsiloxanes (PDMS) and specialty silicone copolymers.
• Lubricant & Grease Formulation: Used as a base fluid or additive in high-performance lubricants and greases requiring wide temperature range operation and excellent dielectric properties.
• Personal Care & Cosmetics: Acts as an emollient and conditioning agent in premium skincare, haircare, and antiperspirant formulations, providing a smooth, non-greasy feel.
• Release Agent & Mold Lubricant: Provides excellent non-stick properties in industrial molding processes for plastics, rubber, and composite materials.
• Surface Treatment & Co-modifier: Imparts water repellency, gloss, and smoothness to surfaces in coatings, textiles, and paper treatments.
• Dielectric & Heat Transfer Fluid: Employed in specialized electronic cooling and electrical insulation applications due to its thermal stability and inertness.

Basic Information

Product Name	Hexacosamethylcyclotridecasiloxane
CAS No.	23732-94-7
Molecular Formula	C26H78O13Si13
Molecular Weight	967.86 g/mol
Synonyms	Cyclotridecasiloxane, hexacosamethyl-; Dodecamethylcyclohexasiloxane, dimer; D13; Cyclic polydimethylsiloxane D13; Decamethylcyclopentasiloxane trimer; 2,2,4,4,6,6,8,8,10,10,12,12,14,14,16,16,18,18,20,20,22,22,24,24,26,26-Hexacosamethyl-1,3,5,7,9,11,13-cyclotridecasiloxane; Cyclomethicone D13
EINECS	Contact for details

Quality Control

Our Hexacosamethylcyclotridecasiloxane is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing, including gas chromatography (GC), to ensure high purity and consistent performance. Certificates of Analysis (COA) detailing specific batch results are provided and available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong acids and incompatible organic solvents. The container must be kept tightly sealed to prevent moisture absorption and contamination.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 98.0%
Refractive Index (n20D)	1.398 - 1.402
Density (25°C)	0.95 - 0.98 g/cm³
Viscosity (25°C)	Contact for details
Water Content (KF)	≤ 0.1%

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