Description

3,3,15,15-Tetramethoxy-2,16-Dioxa-7,8,9,10,11-Pentathia-3,15-Disilaheptadecane is a specialized organosilicon compound featuring a unique polysulfide bridge, making it a valuable intermediate for advanced material synthesis. This compound is critical for applications requiring precise molecular architecture and controlled cross-linking properties. It is primarily utilized by R&D chemists and manufacturers in the pharmaceutical, agrochemical, and specialty polymer industries for developing novel functional materials.

Application

• Key intermediate in the synthesis of novel silicon-containing polymers and resins.
• Cross-linking agent for specialty rubbers and elastomers, enhancing thermal and chemical resistance.
• Building block for advanced material research, particularly in developing self-healing or stimuli-responsive materials.
• Precursor in the preparation of functionalized silanes for surface modification and adhesion promotion.
• Research chemical for exploring new organosilicon chemistry and catalytic processes.
• Intermediate in the development of agrochemicals and pharmaceutical active ingredients with tailored properties.

Basic Information

Product Name	3,3,15,15-Tetramethoxy-2,16-Dioxa-7,8,9,10,11-Pentathia-3,15-Disilaheptadecane
CAS No.	64435-09-2
Molecular Formula	C17H40O6S5Si2
Molecular Weight	545.0 g/mol (approx.)
Synonyms	Bis(3-(trimethoxysilyl)propyl) tetrasulfide; 3,3,15,15-Tetramethoxy-2,16-dioxa-7,8,9,10,11-pentathia-3,15-disilaheptadecane; Si 69 (common trade name); TESPT; Bis(triethoxysilylpropyl) tetrasulfide (related compound); Tetrasulfane, 1,1'-[1,6-hexanediylbis[(3-(trimethoxysilyl)propyl]]; Silane coupling agent Si-69; Coupling agent TESPT
EINECS	Contact for details

Quality Control

Our production of 3,3,15,15-Tetramethoxy-2,16-Dioxa-7,8,9,10,11-Pentathia-3,15-Disilaheptadecane adheres to stringent internal quality protocols to ensure batch-to-batch consistency and purity. Each lot is analyzed using advanced techniques including GC, HPLC, and NMR to verify identity, assay, and impurity profiles. A comprehensive Certificate of Analysis (COA) detailing all specifications is 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). This product is hygroscopic (moisture-sensitive); ensure containers are kept tightly sealed to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Clear to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC/HPLC)	≥ 95.0%
Sulfur Content	22.0 - 24.0 %
Specific Gravity (20°C)	1.08 - 1.12
Refractive Index (n20D)	1.480 - 1.490

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