Description

Hexatriacontamethylheptadecasiloxane is a high molecular weight, linear polydimethylsiloxane (PDMS) fluid, a key member of the silicone family. This compound is valued for its exceptional thermal stability, low surface tension, and high compressibility, making it a critical performance additive in demanding industrial formulations. It is primarily sought by manufacturers in the lubricants, cosmetics, and specialty polymers sectors who require materials with consistent viscosity and inertness under extreme conditions.

Application

• High-Temperature Lubricants & Greases: Serves as a base fluid or thickener for lubricants requiring stability and performance in extreme temperature environments.
• Personal Care & Cosmetics: Acts as a skin-conditioning agent, emollient, and gloss enhancer in premium skincare, haircare, and color cosmetic products due to its smooth, non-greasy feel.
• Release Agents & Molding: Used in plastic, rubber, and composite manufacturing as an effective internal or external mold release agent.
• Dielectric & Heat Transfer Fluids: Employed in specialized electrical and cooling applications where chemical inertness and thermal stability are paramount.
• Polymers & Elastomers: Functions as a plasticizer, processing aid, or modifier to improve the flow, flexibility, and surface properties of silicone and organic polymers.
• Defoamers & Antifoams: A key component in industrial defoamer formulations for processes in petroleum, wastewater treatment, and chemical manufacturing.

Basic Information

Product Name	Hexatriacontamethylheptadecasiloxane
CAS No.	18844-04-7
Molecular Formula	C36H108O16Si17
Molecular Weight	~1253.1 g/mol
Synonyms	Polydimethylsiloxane, trimethylsilyl terminated (n~17); PDMS 17-mer; Dimethyl Silicone Fluid; Dimethicone; Linear Methylsiloxane; Decamethylcyclopentasiloxane, oligomer; Silicone Oil 200 fluid (series); Dow Corning 200 Fluid (analog); 1,1,1,3,3,5,5,7,7,9,9,11,11,13,13,15,15,17,17,19,19,21,21,23,23,25,25,27,27,29,29,31,31,33,33,35,35-Octatriacontamethyloctadecasiloxane (alternative IUPAC)
EINECS	Contact for details

Quality Control

Our Hexatriacacontamethylheptadecasiloxane is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for viscosity, purity, and functional performance. Certificates of Analysis (COA) documenting key parameters are available upon request, providing traceability and assurance for your critical applications.

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 and open flame. For long-term storage, consider using an inert gas blanket to maintain product integrity.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to standard
Viscosity (25°C)	Contact for details
Specific Gravity (25°C)	~0.96 - 0.98
Refractive Index (n20D)	~1.403 - 1.406
Assay (GC)	≥ 95.0% (as PDMS)
Volatile Matter	≤ 1.0%

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