Description

Poly(Hydridosilsesquioxane)-T8, Hydride Substituted is a precisely defined, cage-structured organosilicon compound, also known as a polyhedral oligomeric silsesquioxane (POSS®). This material is valued for its unique hybrid organic-inorganic architecture, which imparts exceptional thermal stability, low dielectric constant, and excellent mechanical reinforcement properties to polymer matrices. It is a critical advanced material for researchers and formulators in the electronics, aerospace, and high-performance coatings industries seeking to enhance material properties at the nanoscale.

Application

• Advanced Polymer Composites: Acts as a nano-reinforcing filler to improve thermal stability, mechanical strength, and reduce flammability in epoxy, silicone, and polyimide resins.
• Low-k Dielectric Materials: A key precursor for spin-on dielectric films in semiconductor manufacturing, enabling reduced capacitance and crosstalk in microelectronic devices.
• Surface Modification & Coupling Agent: The reactive Si-H bonds allow for grafting onto surfaces or copolymerization, modifying surface energy and promoting adhesion.
• Hybrid Material Synthesis: Serves as a well-defined nanobuilding block (NBB) for constructing novel organic-inorganic hybrid materials with tailored porosity and functionality.
• Specialty Coatings: Used to formulate abrasion-resistant, hydrophobic, or thermally protective coatings for optical, automotive, and aerospace components.
• Catalyst & Ligand Support: Provides a robust, inorganic scaffold for immobilizing catalytic metal complexes.
• Photonics & Optoelectronics: Incorporated into materials for light-emitting diodes (LEDs) or waveguides due to its optical clarity and tunable refractive index.

Basic Information

Product Name	Poly(Hydridosilsesquioxane)-T8, Hydride Substituted
CAS No.	137125-44-1
Molecular Formula	H8Si8O12 or [(HSiO1.5)8]
Molecular Weight	401.66 g/mol
Synonyms	Octahydridooctasilsesquioxane; Octakis(hydridodimethylsiloxy)octasilsesquioxane; H-POSS T8; Hydrido POSS® Cage; Polyhedral Oligomeric Silsesquioxane, Hydride; T8-H; Silsesquioxane, hydridoocta-; 1,3,5,7,9,11,13,15-Octakis(hydrido)pentacyclo[9.5.1.13,9.15,15.17,13]octasiloxane
EINECS	Contact for details

Quality Control

Our Poly(Hydridosilsesquioxane)-T8 is manufactured under strict process controls to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analytical characterization, including NMR, FT-IR, and HPLC analysis, to confirm chemical structure and purity. Certificates of Analysis (COA) detailing all specifications are provided with every shipment.

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). The product is moisture-sensitive (hygroscopic) and should be handled under an inert atmosphere (e.g., nitrogen or argon) for long-term storage to prevent oxidation or hydrolysis of the reactive Si-H bonds.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure (Si-H, Si-O-Si peaks)
Purity (HPLC)	≥ 95% (T8 cage)
Molecular Weight	~401.66 g/mol (by calculation)
Hydrogen Content (Si-H)	≥ 1.9% (w/w)
Residual Solvent (GC)	< 0.5%
Loss on Drying	< 1.0%

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