Bis[3-(triethoxysilyl)propyl] tetrasulfide

CAS 40372-72-3C18H42O6S4Si2Chemical Synthesis

Bis[3-(triethoxysilyl)propyl] tetrasulfide (CAS 40372-72-3), with the formula C18H42O6Si2, is a versatile organosilicon compound. Possessing a tetrasulfide linkage and triethoxysilyl groups, it serves as a coupling agent and crosslinker. Its structure facilitates bonding between inorganic materials and organic polymers, enhancing material properties in various industrial applications.

IUPAC: 3,3′-Tetrathiobis(propyl-triethoxysilane)
Synonyms: 3,3′-Tetrathiobis(propyl-triethoxysilane)

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Bis[3-(triethoxysilyl)propyl] tetrasulfide (C18H42O6S4Si2) — chemical structure, CAS 40372-72-3; Chemistry, fine chemical supplied by Tech Serve Solutions

Chemical SynthesisOrganometallic ReagentsOrganosiliconTrialkoxysilanes

01 /Applications

Silane Coupling Agent

This compound acts as an effective coupling agent, promoting adhesion between inorganic fillers (like silica or metal oxides) and organic polymer matrices. This improves the mechanical properties and durability of composite materials.

Crosslinking Agent

Utilised in rubber and polymer formulations, it functions as a crosslinking agent. The tetrasulfide moiety can participate in vulcanization processes, enhancing the elasticity and strength of elastomeric materials.

Surface Modification

Bis[3-(triethoxysilyl)propyl] tetrasulfide can be used to modify the surface properties of inorganic substrates. The silane groups allow for covalent bonding to surfaces, introducing the sulfur-rich organic chain for further functionalization or improved compatibility.

02 /Properties

Molecular weight	538.95
Empirical formula	C18H42O6S4Si2
Assay	≥90% (NMR)
Grade	technical
Density	1.08 g/mL at 20 °C(lit.)
Refractive index	n20/D 1.49

03 /Safety & handling

Protective equipment	Eyeshields, Gloves
Flash point	100 °C / 212 °F
Water hazard class (WGK, DE)	1

Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.

04 /Identifiers & registry

CAS number

40372-72-3

Beilstein registry

2062235

05 /Quality & supply

Documentation

Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.

Supply & logistics

Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.

06 /Frequently asked questions

What is Bis[3-(triethoxysilyl)propyl] tetrasulfide used for?

Bis[3-(triethoxysilyl)propyl] tetrasulfide is primarily used as a silane coupling agent to improve adhesion between inorganic materials and organic polymers, and as a crosslinking agent in rubber and polymer formulations.

What is the CAS number and formula for Bis[3-(triethoxysilyl)propyl] tetrasulfide?

The CAS number is 40372-72-3 and the empirical formula (Hill notation) is C18H42O6Si2.

What grade and purity does Tech Serve Solutions supply?

Tech Serve Solutions supplies Bis[3-(triethoxysilyl)propyl] tetrasulfide in technical grade with an assay of ≥90% (NMR). We do not represent this product as USP, BP, or EP grade.

How should Bis[3-(triethoxysilyl)propyl] tetrasulfide be handled safely?

Handle with appropriate personal protective equipment, including eyeshields and gloves. Refer to the Safety Data Sheet for comprehensive safety and handling information. The flash point is 100 °C.

How is this chemical packed, shipped, and exported?

Tech Serve Solutions packs, ships, and exports chemicals with rigorous adherence to international regulations, ensuring product integrity and safety throughout the supply chain.

How can I request a sample or a quote for Bis[3-(triethoxysilyl)propyl] tetrasulfide?

To request a sample or a quote, please contact our sales team through the website or by phone, providing the product name and CAS number (40372-72-3).