Description

Tetracosamethylundecasiloxane is a linear, fully methylated siloxane oligomer, a key member of the polydimethylsiloxane (PDMS) family. This compound serves as a versatile intermediate and functional fluid, prized for its excellent thermal stability, low surface tension, and hydrophobic properties. It is essential for manufacturers in the silicone industry, particularly for producing high-performance lubricants, release agents, and personal care formulations.

Application

• Intermediate for the synthesis of higher molecular weight silicone polymers and copolymers.
• Base fluid for high-temperature lubricants and heat transfer fluids.
• Key ingredient in mold release agents for plastics, rubber, and composite materials.
• Additive in personal care products (e.g., cosmetics, hair conditioners) for emolliency and shine.
• Water-repellent treatment for textiles, leather, and paper.
• Defoamer and anti-foaming agent in industrial processes.
• Dielectric fluid and damping medium in specialized electrical applications.
• Plasticizer and flow aid in silicone elastomers and sealants.

Basic Information

Product Name	Tetracosamethylundecasiloxane
CAS No.	107-53-9
Molecular Formula	C24H72O10Si11
Molecular Weight	821.66 g/mol
Synonyms	Dodecamethylpentasiloxane; MD11M; Polydimethylsiloxane, trimethylsiloxy terminated; Undecamer of dimethylsiloxane; Linear PDMS (n=11); 1,1,1,3,3,5,5,7,7,9,9,11,11,13,13,15,15,17,17,19,19,21,21,23-Tetracosamethylundecasiloxane; Silicone oil 11-mer
EINECS	203-497-4

Quality Control

Our Tetracosamethylundecasiloxane is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing to ensure consistent purity, viscosity, and performance. We provide detailed Certificates of Analysis (COA) with key parameters including assay, identity confirmation, and impurity profiles 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 oxidizing agents, acids, and bases. For long-term storage under inert atmosphere, please contact us for specific recommendations.

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 (KF)	≤ 0.1%

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