Description

Octatriacontamethyloctadecasiloxane is a high molecular weight, linear polydimethylsiloxane (PDMS) fluid, specifically a member of the silicone oil family. This compound is valued for its exceptional thermal stability, low volatility, and excellent dielectric properties, making it a critical functional fluid in demanding industrial applications. It is primarily utilized by manufacturers in the electronics, aerospace, and specialty lubricant sectors where performance under extreme conditions is required.

Application

• High-Temperature Heat Transfer Fluid: Used in closed-loop systems for precise temperature control in chemical processing and manufacturing.
• Dielectric Coolant & Insulating Fluid: Provides electrical insulation and heat dissipation in high-voltage transformers, capacitors, and other power equipment.
• Base Fluid for Specialty Lubricants & Greases: Formulated into lubricants for extreme-temperature environments, high-vacuum applications, and where chemical inertness is crucial.
• Release Agent & Mold Lubricant: Employed in plastics, rubber, and composite molding processes for excellent surface release.
• Damping & Shock-Absorbing Fluid: Used in precision mechanical and optical instruments to control vibration.
• Water Repellent & Protective Coating Additive: Imparts hydrophobic properties to surfaces and materials.

Basic Information

Product Name	Octatriacontamethyloctadecasiloxane
CAS No.	36938-52-0
Molecular Formula	C38H114O17Si18
Molecular Weight	1339.10 g/mol
Synonyms	Polydimethylsiloxane, trimethylsilyl terminated (D18); Dimethyl Silicone Oil (D18); PDMS, D18; Linear Octadecasiloxane, octatriacontamethyl-; Silicone Fluid 200 (series equivalent); Methyl Silicone Oil; Dow Corning 200 Fluid (analogous); Shin-Etsu KF-96 (analogous)
EINECS	Contact for details

Quality Control

Our Octatriacontamethyloctadecasiloxane is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing to ensure consistency in viscosity, purity, and functional performance. Certificates of Analysis (COA) detailing key parameters such as kinematic viscosity, refractive index, specific gravity, and volatile content are available upon request.

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 sources of ignition. For long-term storage, sealing under an inert atmosphere such as nitrogen is recommended to prevent moisture absorption and oxidative degradation.

Specification

Item	Specification
Appearance	Colorless clear liquid
Identification (IR)	Conforms to structure
Kinematic Viscosity (25°C)	Contact for details
Refractive Index (n20D)	Contact for details
Specific Gravity (25°C)	Contact for details
Volatile Content	≤ 0.5%
Water Content	≤ 0.05%

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