Description

Hexacosamethyldodecasiloxane is a high molecular weight, linear methyl-terminated silicone oligomer, specifically a dodecamer. This compound is a key intermediate and functional fluid valued for its excellent thermal stability, low volatility, and hydrophobic properties. It is primarily utilized in the formulation of high-performance silicone polymers, release agents, and specialty lubricants. Industries such as advanced manufacturing, personal care, and electronics rely on its consistent quality for demanding applications.

Application

• Silicone Polymer Intermediate: Serves as a building block or chain extender in the synthesis of high molecular weight polydimethylsiloxanes (PDMS) and silicone copolymers.
• High-Temperature Lubricants & Greases: Used as a base fluid or additive in formulations requiring exceptional thermal and oxidative stability.
• Mold Release Agents: A key component in non-stick coatings and release formulations for plastics, rubber, and composite materials manufacturing.
• Personal Care & Cosmetic Ingredients: Functions as an emollient and conditioning agent in hair care and skincare products, providing a silky, non-greasy feel.
• Dielectric & Heat Transfer Fluids: Employed in specialized electronic cooling systems or as insulating fluids due to its stable dielectric properties.
• Water Repellent Coatings: Imparts durable hydrophobic characteristics to textiles, paper, and various surfaces.
• Plastic & Rubber Additive: Acts as an internal lubricant and processing aid to improve flow and surface finish.
• Research & Development: Used as a standard or reagent in chemical research for studying silicone chemistry and material properties.

Basic Information

Product Name	Hexacosamethyldodecasiloxane
CAS No.	2471-08-1
Molecular Formula	C26H78O11Si12
Molecular Weight	919.9 g/mol
Synonyms	Dodecamethylpentasiloxane; MD12M; Polydimethylsiloxane, dodecamer; Methyl-terminated PDMS (n=10); Linear methylsiloxane dodecamer; Silicone oil D12; 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-Hexacosamethyl-12-oxa-11,13,15,17,19,21,23,25-octasilapentacosane
EINECS	219-598-7

Quality Control

Our Hexacosamethyldodecasiloxane is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing, including assay, identity confirmation, and impurity profiling, to ensure it meets precise specifications. Certificates of Analysis (COA) documenting purity, viscosity, and other critical parameters are provided to guarantee traceability and batch-to-batch consistency for your formulation needs.

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, strong bases, 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)	≥ 95.0% (as MD12M)
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.