Description

1,1,3,3,5,5,7,7,9,9,11,11,13,13,15,15-Hexadecamethyloctasilo is a high-purity, linear organosilicon compound belonging to the class of permethylated linear oligosiloxanes. This material is valued for its exceptional thermal stability, low volatility, and high compatibility with organic polymers and resins. It serves as a critical intermediate and functional additive in advanced material science, particularly for industries requiring precise control over surface properties and thermal management. The compound is available under CAS No. 19095-24-0.

Application

• Silicone Polymer Modification: Acts as a chain extender or endblocker in the synthesis of specialty silicone fluids and elastomers to tailor viscosity, thermal stability, and reactivity.
• Surface Treatment & Release Agents: Used to create hydrophobic, low-surface-energy coatings for mold release applications in plastics, rubber, and composite manufacturing.
• Advanced Material Precursor: Serves as a key building block (monomer or intermediate) in the production of silsesquioxanes (POSS) and other hybrid organic-inorganic materials.
• Lubricant & Grease Formulation: Incorporated as a high-performance base fluid or additive in specialty lubricants for high-temperature and extreme environment applications.
• Dielectric & Electronic Materials: Utilized in the formulation of encapsulants, potting compounds, and insulating layers due to its excellent electrical properties and thermal endurance.
• Pharmaceutical & Cosmetic Intermediates: Employed in the synthesis of siloxane-based ingredients where high purity and defined molecular structure are paramount.

Basic Information

Product Name	1,1,3,3,5,5,7,7,9,9,11,11,13,13,15,15-Hexadecamethyloctasilo
CAS No.	19095-24-0
Molecular Formula	C16H48O7Si8
Molecular Weight	577.18 g/mol
Synonyms	Hexadecamethyloctasiloxane; Octakis(dimethylsiloxy)octasiloxane; Linear Octamer of Dimethylsiloxane; MD8M; Octamethyloctasiloxane-1,15-diol; Permethylated Linear Octasiloxane; 1,1,3,3,5,5,7,7,9,9,11,11,13,13,15,15-Hexadecamethyloctasiloxane; D8 Siloxane
EINECS	242-852-1

Quality Control

Our 1,1,3,3,5,5,7,7,9,9,11,11,13,13,15,15-Hexadecamethyloctasilo is manufactured under strict quality management systems to ensure batch-to-batch consistency and high purity. Each lot is characterized using advanced analytical techniques including Gas Chromatography (GC), Nuclear Magnetic Resonance (NMR), and Gel Permeation Chromatography (GPC). A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with every shipment 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 (15-25°C). Keep away from strong bases and incompatible materials such as strong oxidizing agents. The container must be kept tightly sealed to prevent moisture absorption and potential contamination.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to reference spectrum
Assay (GC)	≥ 95.0% (Area %)
Refractive Index (n20D)	1.395 - 1.405
Density (20°C)	0.95 - 0.99 g/mL
Water Content (KF)	≤ 0.1% (w/w)

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