Description

Octacosamethyltridecasiloxane is a high molecular weight, linear polydimethylsiloxane (PDMS) fluid, specifically a siloxane oligomer. This compound is valued for its excellent thermal stability, low surface tension, and high compressibility, making it a versatile functional fluid and intermediate. It is primarily needed by manufacturers in the silicone industry, specialty lubricants, and personal care formulations where consistent performance and purity are critical.

Application

• As a high-performance base fluid or additive in specialty lubricants and greases for extreme temperature applications.
• As a key intermediate or chain extender in the synthesis of custom silicone polymers and resins.
• As a spreading agent and emollient in high-end cosmetic and personal care products (e.g., creams, lotions).
• As a dielectric or heat transfer fluid in specific electronic and electrical applications.
• As a mold release agent or processing aid in plastics and rubber manufacturing.
• As a component in defoamers and antifoaming agents for industrial processes.
• For research and development as a standard or reference material in analytical chemistry and material science.

Basic Information

Product Name	Octacosamethyltridecasiloxane
CAS No.	2471-09-2
Molecular Formula	C28H86O12Si13
Molecular Weight	967.98 g/mol
Synonyms	Polydimethylsiloxane, trimethylsiloxy-terminated (D13); PDMS, D13; Dimethylsiloxane, trimethylsiloxy-terminated; Linear MD13M Siloxane; 1,1,1,3,3,5,5,7,7,9,9,11,11,13,13,15,15,17,17,19,19,21,21,23,23,25,25-Heptacosaoxa-2,4,6,8,10,12,14,16,18,20,22,24,26-tridecasilaoctacosane; Decamethyltetrasiloxane (common misnomer for shorter chain); Silicone Fluid D13; Contact for additional synonyms.
EINECS	219-598-7

Quality Control

Our Octacosamethyltridecasiloxane is produced under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for identity, purity, and performance. Certificates of Analysis (COA) detailing key parameters such as assay, viscosity, and refractive index 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, well-ventilated area at room temperature (15-25°C). Keep away from strong acids, bases, and oxidizing agents to maintain product integrity.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 95.0%
Viscosity (25°C)	Contact for details
Refractive Index (n20D)	Contact for details
Density (25°C)	Contact for details
Water Content	≤ 0.1%

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