Description

Octakis(Dimethylsiloxy)-T8-Silsequioxane is a precisely defined, cage-structured organosilicon compound, representing a key member of the polyhedral oligomeric silsesquioxane (POSS) family. This material matters for its unique hybrid organic-inorganic architecture, which imparts exceptional thermal stability, low dielectric constant, and enhanced mechanical properties when incorporated into polymer matrices. It is primarily needed by formulators and researchers in advanced materials development for high-performance coatings, aerospace composites, and next-generation electronics.

Application

• As a nanoscale reinforcing agent in high-temperature thermoset and thermoplastic composites for aerospace and automotive applications.
• As a functional additive to enhance thermal stability, reduce dielectric constant, and improve mechanical strength in specialty silicone resins and elastomers.
• As a precision building block (nanobuilding block) for constructing hybrid organic-inorganic materials with tailored properties.
• In the formulation of low-k dielectric materials for advanced semiconductor packaging and microelectronics.
• As a surface modification agent to alter surface properties like hydrophobicity, adhesion, and scratch resistance.
• For research and development of novel catalysts, sensors, and drug delivery systems leveraging its well-defined cage structure.
• As a crosslinking agent or co-monomer in the synthesis of new polymeric networks with enhanced performance characteristics.

Basic Information

Product Name	Octakis(Dimethylsiloxy)-T8-Silsequioxane
CAS No.	125756-69-6
Molecular Formula	C16H48O12Si8
Molecular Weight	689.30 g/mol
Synonyms	Octakis(dimethylsiloxy)silsesquioxane; T8-POSS Dimethylsiloxy; POSS Cage Mixture; Polyhedral Oligomeric Silsesquioxane, Octa(dimethylsiloxy) Derivative; Octa(dimethylsiloxy)silsesquioxane; (c-C6H17O12Si8)n; POSS® OS0401 (Trade Name Variant); DDSQ
EINECS	Contact for details

Quality Control

Our Octakis(Dimethylsiloxy)-T8-Silsequioxane is manufactured under controlled conditions to ensure batch-to-batch consistency and high purity. Each lot undergoes rigorous quality testing, including analysis by NMR, FT-IR, and HPLC, to confirm chemical identity and purity. Certificates of Analysis (COA) detailing all specifications are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); ensure containers are sealed immediately after use to prevent degradation due to atmospheric moisture. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 95.0% (T8 Cage)
Loss on Drying	≤ 1.0 %
Residue on Ignition	≤ 0.5 %

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