Description

Octatriacontamethylcyclononadecasiloxane is a high molecular weight, cyclic siloxane polymer, also known as a cyclosiloxane. This compound is valued for its exceptional thermal stability, low surface tension, and high lubricity, making it a critical functional fluid and additive in advanced manufacturing. It is primarily utilized in industries requiring high-performance silicone-based materials, such as specialty lubricants, release agents, and as a precursor or intermediate in silicone resin synthesis.

Application

• As a high-temperature base fluid or additive in specialty lubricants and greases for demanding industrial applications.
• Functioning as a highly effective mold release agent in plastics, rubber, and composite material processing.
• Acting as a key intermediate or building block in the synthesis of specialized silicone resins and polymers with tailored properties.
• Utilized as a surface treatment agent to impart water repellency and smoothness to textiles, paper, or fibers.
• Serving as a dielectric fluid or insulating material in specific electrical or electronic applications.
• Employed as a plasticizer or flow aid in high-performance silicone elastomers and sealants.
• Potential use as a heat transfer fluid in closed-loop systems due to its thermal stability.
• Application in cosmetic and personal care formulations as a volatile carrier or emollient (subject to specific grade and regulatory approval).

Basic Information

Product Name	Octatriacontamethylcyclononadecasiloxane
CAS No.	150026-97-4
Molecular Formula	C38H114O19Si19
Molecular Weight	1413.10 g/mol
Synonyms	Cyclononadecasiloxane, octatriacontamethyl-; D19 Cyclic; Octatriacontamethylcyclononadecasiloxane; Cyclic Volatile Methyl Siloxane (cVMS) D19; Decamethylcyclopentasiloxane (D5) Homolog; Cyclic Siloxane D19; 1,1,3,3,5,5,7,7,9,9,11,11,13,13,15,15,17,17,19-Nonadecaoxa-2,2,4,4,6,6,8,8,10,10,12,12,14,14,16,16,18,18,19-nonadecasila-1,3,5,7,9,11,13,15,17-nonaene, 2,2,4,4,6,6,8,8,10,10,12,12,14,14,16,16,18,18,19-nonadecamethyl-
EINECS	Contact for details

Quality Control

Our Octatriacontamethylcyclonadecasiloxane is manufactured under a stringent quality management system. Each batch undergoes rigorous analytical testing to ensure consistency, purity, and performance. Key parameters such as identity, assay, and specific impurity profiles are verified. Certificates of Analysis (COA) documenting these results are available upon request to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (typically 15-25°C). Keep away from strong oxidizing agents and incompatible materials. For long-term storage, consider an inert atmosphere to maintain product integrity.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to reference spectrum
Assay (GC)	≥ 95.0%
Refractive Index (n20/D)	1.390 - 1.405
Density (g/mL at 20°C)	0.95 - 1.00
Volatile Matter	≤ 2.0%

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