PRODUCTS

BIS-(3-TRIETHYOXYSILYLPROPYL)TETRASULFIDE

Bis-(3-triethyoxysilylpropyl)tetrasulfide is a silanized coupling agent and modifier.
Bis-(3-triethyoxysilylpropyl)tetrasulfide has been used to design a new generation of sustainable self-healing styrene-butadiene compounds.
Bis-(3-triethyoxysilylpropyl)tetrasulfide is widely used in rubber products such as tread, carcass, outer wall of radial tires and rubber tires.

CAS Number: 40372‑72‑3
EC / EINECS Number: 254‑896‑5
MDL Number: MFCD00053751
IUPAC Name: Bis[3‑(triethoxysilyl)propyl] tetrasulfide; PIN: [Tetrasulfanediyldi(propane‑3,1‑diyl)]bis(triethoxysilane)
Chemical formula: C18H42O6S4Si2
Molar mass: 538.95

SYNONYMS:
Bis[3-(triethoxysilyl)propyl]tetrasulfide, Bis(3‑triethoxysilylpropyl)tetrasulfane, 3,3′-Tetrathiobis(propyl‑triethoxysilane), Si‑69, TESPT, bis 3-triethoxysilyl propyl tetrasulfide, 4,4,15,15-tetraethoxy-3,16-dioxa-8,9,10,11-tetrathia-4,15-disilaoctadecane, unii-j98v193zry, bis 3-triethoxysilyl propyl tetrasulphide, 3,16-dioxa-8,9,10,11-tetrathia-4,15-disilaoctadecane, 4,4,15,15-tetraethoxy, silane coupler kh-858, acmc-1akw5, dsstox_cid_9362 [Tetrasulfanediyldi(propane-3,1-diyl)]bis(triethoxysilane), Bis[3-(triethoxysilyl)propyl]tetrasulfide, Bis(3-triethoxysilylpropyl)tetrasulfane, Bis(3-triethoxysilylpropyl)tetrasulfane, Bis[3-(triethoxysilyl)propyl] tetrasulfide,
Bis[g-(triethoxysilyl)propyl] tetrasulfide, 3,16-Dioxa-8,9,10,11-tetrathia-4,15-disilaoctadecane,4,4,15,15-tetraethoxy-, 4,4,15,15-Tetraethoxy-3,16-dioxa-8,9,10,11-tetrathia-4,15-disilaoctadecane, Si 69, Bis[3-(triethoxysilyl)propyl] tetrasulfide, Si 29, B 2494, 3,3′-Bis(triethoxysilylpropyl) tetrasulfide, Bis(3-triethoxysilylpropyl)tetrasulfane, Unisilan 41, Silquest A 1289, KH 846, Bis[γ-(triethoxysilyl)propyl] tetrasulfide, MB 69, A 1289, Silane 69, EF 60, EF 60 (coupling agent), Degussa Si 69, SCA 98, SIB 1825.0, TM 69, Cabrus 4, KBE 849, KBE 846, Z 6940, TESPT, WD 40, WD 40 (coupling agent), KH 845-4, KBE 845, DB 619, Xiameter Z 6940, KH 845-4-2, Bis[triethoxysilylpropyl] tetrasulfide, KH 858, KBM 846, KBE 864, Luvomaxx TESPT, Couplink 89, Bis(triethoxysilylpropyl)tetrasulfane, SG-Si 998, HP 1898B, BTES, Bis(3-(ethoxysilyl)propyl)tetrasulfide, OFS 6940, Xiameter OFS 6940, Bis(3-triethoxisilylpropyl)tetrasulfide, B 803049, BTSPS, KH 69, KH-Si 69, Silanogran SI 69, OFS 6945, 154836-48-3, 189257-97-4, 224045-74-3, 727395-70-2, 862469-02-1, 908238-15-3, 1351508-69-4
TESPT, A-1289, KHSI69, Z-6940, CG-Si69, KBE-846, CouplingagentG-407, Bis[3-(triethoxysily, Silane coupler KH-858, SilanecouplingagentSI-69, Si-69, TESPT, TESPTS, 3,3′-Tetrathiobis(propyl-triethoxysilane), 3,3'-Bis(triethoxysilylpropyl)tetrasulfide, 4,4,15,15-Tetraethoxy-3,16-dioxa-8,9,10,11-tetrathia-4,15-disilaoctadecane, Si-69, TESPT, BHCOUP-Si-69, Coupling Agent-Si-69, Silane coupler KH-858, Silane Coupling Agent Si-69, Silane Coupling Agent KH-858, Silane Coupling Agent A-1289, BIS(TRIETHOXYSILYLPROPYL)TETRASULPHANE, Bis(3-triethoxysilylpropyl)-tetrasulfan, Bis(3-triethoxysilylpropyl)tetrasulfide, 3,3'-TETRATHIOBIS(PROPYL-TRIETHOXYSILANE), Bis[γ-(triethoxysilyl)propyl]tetrasulfide, Bis-(γ-triethoxysilylpropyl)-tetrasulfide, Bis[3-(triethoxysilyl)propyl]tetrasulfide, BIS(3-(TRIETHOXYSILYL)PROPYL)TETRASULFIDE, Bis[γ-(triethoxysilyl-propyl]-tetrasulfide, Bis-[3-(triethoxysilylpropyl)]-tetrasulfide, Bis-[γ-(triethoxysilylpropyl)]-tetrasulfide, Bis-[γ-(triethoxysilyl)-propyl]-tetrasulfide, BIS [3-(TRIETHOXYSILYL )PROPYL ] TETRASULPHIDE, 4,4,15,15-tetraethoxy-3,16-dioxa-8,9,10,11-tetrathia-4,15-disilaoctadecane, 3,16-Dioxa-8,9,10,11-tetrathia-4,15-disilaoctadecane,4,4',15,15-tretraethoxy

Bis-(3-triethyoxysilylpropyl)tetrasulfide is an organosulfur compound with the formula S4[C3H6Si(OEt)3]2 (Et = C2H5).
Bis-(3-triethyoxysilylpropyl)tetrasulfide consists of two trialkoxysilyl propyl groups linked with a polysulfide.
Bis-(3-triethyoxysilylpropyl)tetrasulfide is often sold as a mixture with the trisulfide.

Bis-(3-triethyoxysilylpropyl)tetrasulfide is a colorless viscous liquid that is soluble in ordinary organic solvents such as toluene.
Commercial samples of Bis-(3-triethyoxysilylpropyl)tetrasulfide often are yellowish.
Bis-(3-triethyoxysilylpropyl)tetrasulfide is yellowish clear liquid

Bis-(3-triethyoxysilylpropyl)tetrasulfide is a cross-linking agent that can be used to create polymer films.
Bis-(3-triethyoxysilylpropyl)tetrasulfide has been shown to form hydrated films in deionized water, which have been studied with atomic force microscopy.

Kinetic data for the polymerization of Bis-(3-triethyoxysilylpropyl)tetrasulfide has also been obtained by following the increase in viscosity of a solution containing a small amount of bis[3-(triethoxysilyl)propyl]tetrasulfide and an organic modifier.
Bis-(3-triethyoxysilylpropyl)tetrasulfide is typically synthesized using solid-phase synthesis on carbon nanotubes or particles.

Bis-(3-triethyoxysilylpropyl)tetrasulfide is a chemical compound with the molecular formula (C₂H₅O)₃Si(CH₂)₃SSS(CH₂)₃Si(OC₂H₅)₃.
Bis-(3-triethyoxysilylpropyl)tetrasulfide is commonly referred to as "TESPT" or "TESPTES" in shorthand.
Bis-(3-triethyoxysilylpropyl)tetrasulfide is a multi-functional silane coupling agent successfully used in the rubber industry.

The suitable rubber, Bis-(3-triethyoxysilylpropyl)tetrasulfide, include natural rubber (NR), Butadiene styrene rubber (SBR), Isoprene rubber (IR), Butadiene rubber (BR), Acrylonitrile butadiene rubber (NBR), Ethylene propylene diene rubber (EPDM), etc.
The suitable inorganic fillers include carbon black, white carbon black, glass fiber, talc, mica, fly ash and clay etc.

Bis-(3-triethyoxysilylpropyl)tetrasulfide is a silylation coupling agent and modifier that has been used to design a new generation of sustainable self-healing styrene-butadiene compounds;
Bis[3-(triethoxysilyl)propyl] tetrasulfide, with the CAS number 40372-72-3, is an organosilicon compound characterized by its unique structure that includes both silane and sulfur functionalities.

Bis-(3-triethyoxysilylpropyl)tetrasulfide typically features two triethoxysilyl groups attached to a central tetrasulfide chain, which contributes to its reactivity and utility in various applications.
It is known for its excellent adhesion properties, making Bis-(3-triethyoxysilylpropyl)tetrasulfide valuable in the formulation of sealants, adhesives, and coatings, particularly in enhancing the bonding of organic materials to inorganic substrates.

The presence of ethoxy groups allows for hydrolysis and subsequent condensation reactions, facilitating the formation of siloxane networks upon exposure to moisture.
Additionally, the tetrasulfide linkage imparts flexibility and resilience to Bis-(3-triethyoxysilylpropyl)tetrasulfide, enhancing its performance in rubber and polymer composites.

USES and APPLICATIONS of BIS-(3-TRIETHYOXYSILYLPROPYL)TETRASULFIDE:
Bis-(3-triethyoxysilylpropyl)tetrasulfide's role is to improve the compatibility of rubber with filler, then enhance the reinforcing effect of the filler.
Bis-(3-triethyoxysilylpropyl)tetrasulfide is suitable for the double bond-containing polymers (such as NR, NBR, SBR, IR, BR, EPDM, and their mixture) or the rubber formulations by using hydroxyl group-containing fillers (such as silica, silicates, etc.).

Bis-(3-triethyoxysilylpropyl)tetrasulfide is a light yellow transparent liquid with slight ethyl alcohol odor, easily soluble in organic solvents such as ethyl alcohol, acetone, benzene, toluene and chlorohydrocarbon, etc.
Bis-(3-triethyoxysilylpropyl)tetrasulfide is a kind of silane coupling agent with multiple functional groups successfully used in rubber industry to improve modulus and tensile strength of rubber, to reduce the compound viscosity and save process energy consumption.

Bis-(3-triethyoxysilylpropyl)tetrasulfide is especially applicable for polymers with double bond or rubber formulation with hydroxyl fillers.
Bis-(3-triethyoxysilylpropyl)tetrasulfide is suitable for sulfur rubber and can improve the crosslinking stability, tear resistance, shear resistance, water resistance and reduce the compression deformation.

Bis-(3-triethyoxysilylpropyl)tetrasulfide is a multifunctional silicone rubber and tire additive that has been successfully applied in the rubber industry.
Bis-(3-triethyoxysilylpropyl)tetrasulfide's function is to increase the elastic modulus and tensile strength of rubber, significantly improve the wear resistance and compression performance of rubber, reduce the viscosity of rubber, and save processing energy consumption.

Bis-(3-triethyoxysilylpropyl)tetrasulfide is widely used in radial tire and rubber tire tread, carcass, tire outer wall, solid rubber tire rubber roller surface and other rubber products.
Bis-(3-triethyoxysilylpropyl)tetrasulfide is a silanized coupling agent and modifier.

Bis-(3-triethyoxysilylpropyl)tetrasulfide has been used to design a new generation of sustainable self-healing styrene-butadiene compounds.
Bis-(3-triethyoxysilylpropyl)tetrasulfide is widely used in rubber products such as tread, carcass, outer wall of radial tires and rubber tires.

Bis-(3-triethyoxysilylpropyl)tetrasulfide is a multifunctional silane coupling agent that has been successfully used in the rubber and plastic industry.
Bis-(3-triethyoxysilylpropyl)tetrasulfide's application improves the physical and mechanical properties of rubber, the tensile strength, tear strength, wear resistance, etc.

Bis-(3-triethyoxysilylpropyl)tetrasulfide can be significantly improved, and the permanent deformation can be reduced.
At the same time, Bis-(3-triethyoxysilylpropyl)tetrasulfide can also reduce the viscosity of the rubber and improve the processing performance.

Bis-(3-triethyoxysilylpropyl)tetrasulfide is particularly suitable for vulcanized rubber systems with silica or silicate as reinforcing agents, and its applicable fillers include silica, talcum powder, clay, mica powder, clay, etc., and applicable polymers include NR, IR, SBR, BR, NBR, EPDM, etc.

Bis-(3-triethyoxysilylpropyl)tetrasulfide is added to rubber compositions that contain silica filler.
Bis-(3-triethyoxysilylpropyl)tetrasulfide is used in radial tires, rubber tire treads, carcass, tire walls, solid rubber tires and other rubber products.

Bis-(3-triethyoxysilylpropyl)tetrasulfide acts as a chemical intermediate and as a cross linking agent.
Furthermore, Bis-(3-triethyoxysilylpropyl)tetrasulfide acts as a coupling agent used to chemically modify silica surface.
In addition, Bis-(3-triethyoxysilylpropyl)tetrasulfide serves as a curing agent for good heat aging.

Silane coupling and cross-linking agent in rubber & tire manufacturing, especially in silica-filled compounds (NR, SBR, NBR, EPDM) – Bis-(3-triethyoxysilylpropyl)tetrasulfide improves modulus, tensile strength, abrasion resistance, aging properties, and reduces hysteresis.
Bis-(3-triethyoxysilylpropyl)tetrasulfide enhances adhesion in precious metal–polymer interfaces and protects metal surfaces from corrosion.

Bis-(3-triethyoxysilylpropyl)tetrasulfide is used precursor for mesoporous organosilica material synthesis.
Bis-(3-triethyoxysilylpropyl)tetrasulfide is a silylating coupling agent and modifier, and has been used in the design of a new generation of sustainable self-healing styrene-butadiene compounds.

Bis-(3-triethyoxysilylpropyl)tetrasulfide is used in radial tires, rubber tire treads, carcass, tire walls, solid rubber tires and other rubber products.
Bis-(3-triethyoxysilylpropyl)tetrasulfide acts as a chemical intermediate and as a cross linking agent.

Furthermore, Bis-(3-triethyoxysilylpropyl)tetrasulfide acts as a coupling agent used to chemically modify silica surface.
In addition, Bis-(3-triethyoxysilylpropyl)tetrasulfide serves as a curing agent for good heat aging.
Bis-(3-triethyoxysilylpropyl)tetrasulfide is generally used as a crosslinking agent and reinforcing filler in the manufacturing of rubber.

Bis-(3-triethyoxysilylpropyl)tetrasulfide film provides corrosion protection to the metallic substrates.
Bis-(3-triethyoxysilylpropyl)tetrasulfide is also used as a precursor in the synthesis of mesoporous organosilicas.
Bis-(3-triethyoxysilylpropyl)tetrasulfide is generally used as a crosslinking agent and reinforcing filler in the manufacturing of rubber.

Bis-(3-triethyoxysilylpropyl)tetrasulfide is widely used in radial tires and rubber tire treads, carcasses, tire outer walls, solid rubber tire rubber roller surfaces and other rubber products;
Bis-(3-triethyoxysilylpropyl)tetrasulfide is a multifunctional silane coupling agent that has been successfully used in the rubber and plastics industry.

Its application can improve the physical and mechanical properties of rubber, and its tensile strength, tear resistance, and wear resistance can be significantly improved, the permanent deformation can be reduced, and Bis-(3-triethyoxysilylpropyl)tetrasulfide can also reduce the viscosity of the rubber compound and improve the processing performance.

Bis-(3-triethyoxysilylpropyl)tetrasulfide is especially suitable for vulcanized rubber systems using silica or silicate as reinforcing agents.
Bis-(3-triethyoxysilylpropyl)tetrasulfide is applicable fillers include silica, talc, clay, mica powder, clay, etc.
Applicable polymers include NR, IR, SBR, BR, NBR, EPDM, etc.

Bis-(3-triethyoxysilylpropyl)tetrasulfide is used as a sulfur-containing silane coupling agent in the rubber industry, particularly in the production of tires and other rubber products.
Bis-(3-triethyoxysilylpropyl)tetrasulfide's function is to improve the bonding between rubber and inorganic fillers or reinforcements, thereby enhancing the mechanical properties and durability of the rubber compounds.

Bis-(3-triethyoxysilylpropyl)tetrasulfide is a multifunctional additive that has been successfully applied in the silicone rubber and tire industry.
Bis-(3-triethyoxysilylpropyl)tetrasulfide is to increase the elastic modulus and tensile strength of rubber, significantly improve the wear resistance and compression performance of rubber, reduce the viscosity of rubber, and save processing energy consumption.

Bis-(3-triethyoxysilylpropyl)tetrasulfide is suitable for rubber formulations that use hydroxyl fillers in double bond-containing polymers or their blends.
Bis-(3-triethyoxysilylpropyl)tetrasulfide is used applicable fillers, include silica, silicate, chalk, etc.; applicable rubbers include natural rubber (NR), styrene-butadiene rubber (SBR), isoprene rubber (IR), butadiene rubber (BR), nitrile Rubber (NBR) and ethylene propylene diene monomer (EPDM), etc.

When used in rubber compounds, Bis-(3-triethyoxysilylpropyl)tetrasulfide produces these effects: Coupling agent for non-black pigments; Cure equilibrium for reversion resistance; and Curing agent for good heat aging.
Bis-(3-triethyoxysilylpropyl)tetrasulfide is used for rubber, tire (tread, tire body and the tire wall), and solid rubber tire roller surface.

The conveyor belt surface, steel brush wire bonding, cable (insulation layer and coated layer) shoes (marathon shoes and tennis shoes).
Bis-(3-triethyoxysilylpropyl)tetrasulfide is primarily utilized as a coupling agent and adhesion promoter.
In the pharmaceutical sector, Bis-(3-triethyoxysilylpropyl)tetrasulfide's organosilane interactions may be used in specialized drug delivery systems.

Overall, Bis-(3-triethyoxysilylpropyl)tetrasulfide is significant in the field of materials science, particularly in applications requiring durable and chemically resistant formulations.
Bis-(3-triethyoxysilylpropyl)tetrasulfide is an advanced organic silicon compound that belongs to the group of organo-functional silanes.

Bis-(3-triethyoxysilylpropyl)tetrasulfide is widely used in the rubber and tire industry as an efficient cross-linking agent for highly filled and reinforced rubber compounds.
Bis-(3-triethyoxysilylpropyl)tetrasulfide has excellent adhesion, weather resistance, and chemical stability, which help to enhance the performance and durability of rubber products.

-When used in rubber compounds, Bis-(3-triethyoxysilylpropyl)tetrasulfide produces these effects:
*Coupling agent for non-black pigments;
*Cure equilibrium for reversion resistance;
*Curing agent for good heat aging.

*Coupling Agent - With as little as 0.5 to 1.0 phr with clay fillers and 1.0 to 4.0 phr for silica pigments, Bis-(3-triethyoxysilylpropyl)tetrasulfide couples the non-black pigment and elastomers resulting in increases in modulus and increase in abrasion resistance.

*Cure Equilibrium - Bis-(3-triethyoxysilylpropyl)tetrasulfide has four sulfur atoms positioned in the center.
At cure temperatures, these participate with sulfur in producing polysulfidic crosslinks.
The Bis-(3-triethyoxysilylpropyl)tetrasulfide replaces crosslinks broken during cure, resulting in reversion resistant, and with proper compounding, reversion free compounds.

This is known as equilibrium cure.
The dynamic flex characteristics, E.G., heat generation and crack growth, are dramatically improved.

*Curing Agent - Removing all sulfur from the compound for NR, SBR, NBR and replacing it with Bis-(3-triethyoxysilylpropyl)tetrasulfide and certain thiuram accelerators, produces compounds with excellent heat aging characteristics in addition to the coupling effects.
Bis-(3-triethyoxysilylpropyl)tetrasulfide is a silane coupling agent that has crosslinking and accelerator activity in rubber compounds.

*Belts Flat Belts - Bis-(3-triethyoxysilylpropyl)tetrasulfide is increased abrasion | Improved reversion resistance | Reduced cost with clay substitution for black | Improved cord adhesion | Increased flex life and modulus
*Belts - Bis-(3-triethyoxysilylpropyl)tetrasulfide is increased modulus | Improved abrasion | Longer flex life | Improved adhesion to reinforcing elements

POTENTIAL APPLICATIONS of BIS-(3-TRIETHYOXYSILYLPROPYL)TETRASULFIDE:
Bis-(3-triethyoxysilylpropyl)tetrasulfide is a kind of silane coupling agent with multiple functional groups successfully used in rubber industry to improve modulus and tensile strength of rubber, to reduce the compound viscosity and save process energy consumption.
Bis-(3-triethyoxysilylpropyl)tetrasulfide is especially applicable for polymers with double bond or rubber formulation with hydroxyl fillers.

The suitable fillers include silica, silicate, clay, etc.
The suitable rubber include natural rubber (NR), Butadiene styrene rubber (SBR), Isoprene rubber (IR), Butadiene rubber (BR), Acrylonitrile butadiene rubber (NBR), Ethylene propylene diene rubber (EPDM), etc.

Bis-(3-triethyoxysilylpropyl)tetrasulfide‘s widely used in rubber products such as the tread, carcass, outer wall, and solid rubber roller surface of radial tires and their rubber tires.
Bis-(3-triethyoxysilylpropyl)tetrasulfide's application has improved the physical and mechanical properties of rubber, significantly improving tensile strength, tear resistance, wear resistance, and reducing permanent deformation.

At the same time, Bis-(3-triethyoxysilylpropyl)tetrasulfide can also reduce the viscosity of the rubber material and improve processing performance.

Especially suitable for vulcanized rubber systems with carbon black, white-carbon, or silicate as reinforcing agents, Bis-(3-triethyoxysilylpropyl)tetrasulfide'suitable fillers include white-carbon, talc powder, clay, mica powder, clay, etc., and its suitable polymers include NR, IR, SBR, BR, NBR, EPDM, etc.

BENEFITS & KEY CHARACTERISTICS of BIS-(3-TRIETHYOXYSILYLPROPYL)TETRASULFIDE:
*Dual compatibility:
Bis-(3-triethyoxysilylpropyl)tetrasulfide links inorganic fillers (e.g., silica) to organic polymers for enhanced performance.
Bis-(3-triethyoxysilylpropyl)tetrasulfide improves mechanical & aging properties in tire and rubber applications.

Versatile across industries—from tires and hoses to adhesives and coatings.
Bis-(3-triethyoxysilylpropyl)tetrasulfide is essential in reinforcing rubber and enhancing filler adhesion.

FUNCTIONALITY of BIS-(3-TRIETHYOXYSILYLPROPYL)TETRASULFIDE:
Bis-(3-triethyoxysilylpropyl)tetrasulfide moieties undergo hydrolysis and condensation to form covalent bonds with silica or inorganic surfaces.
Polysulfide chain enables connection with organic polymers (e.g., vulcanization in rubber).
Typical Composition:
Bis-(3-triethyoxysilylpropyl)tetrasulfide may include S₂–S₁₀ species; average Sₙ ≈3.8–4.

SYNTHESIS AND REACTIVITY of BIS-(3-TRIETHYOXYSILYLPROPYL)TETRASULFIDE:
Bis-(3-triethyoxysilylpropyl)tetrasulfide was first prepared by the reaction of 3-(triethoxysilyl)propyl chloride with sodium tetrasulfide:
Na2S4 + 2 ClC3H6Si(OEt)3 → S4[C3H6Si(OEt)3]2 + 2 NaCl

Bis-(3-triethyoxysilylpropyl)tetrasulfide is a bifunctional molecule in that it contains two kinds of reactive functional groups.
The tetrasulfide group is a polysulfide, which means that it consists of a chain of sulfur atoms.
S-S bonds are susceptible to reduction (to thiols), attachment to metals (e.g., for protection against corrosion), and vulcanization.

The triethoxysilyl groups are susceptible to hydrolysis, resulting in cross-linking via sol-gel condensation.
In the usual application of Bis-(3-triethyoxysilylpropyl)tetrasulfide, the hydrolyzed siloxy groups attach to silica particles and the polysulfide groups link to the organic polymer.

PHYSICAL and CHEMICAL PROPERTIES of BIS-(3-TRIETHYOXYSILYLPROPYL)TETRASULFIDE:
CAS Number: 40372‑72‑3
EC / EINECS Number: 254‑896‑5
IUPAC Name: Bis[3‑(triethoxysilyl)propyl] tetrasulfide; PIN: [Tetrasulfanediyldi(propane‑3,1‑diyl)]bis(triethoxysilane)
Appearance: Colorless to light yellow viscous liquid (syrupy)
Odor: Slight sulfurous, ethanol-like note
Density: ≈ 1.08–1.10 g/mL at 20–25 °C
Refractive Index: ~1.49 @20 °C
Viscosity: ~9.5–11 cSt at 25 °C
Boiling Point: ~250 °C (decomposes)
Flash Point: ~91–100 °C (closed cup)

Vapor Pressure: <1 mmHg at 25 °C
Solubility: Insoluble in water (<1 mg/L); soluble in organic solvents like toluene, acetone, ethanol
CAS / EC: 40372‑72‑3 / 254‑896‑5
Formula / Mol. Mass: C₁₈H₄₂O₆S₄Si₂ / 538.95 g/mol
Appearance: Light yellow viscous liquid
Density: ~1.08 g/mL @ 20 °C
Viscosity: ~10 cSt @ 25 °C
Flash Point: ~91 °C
Boiling Point: ~250 °C (decomposes)
Solubility: Insoluble in water; soluble in organics

Chemical formula: C18H42O6S4Si2
Molar mass: 538.95
Appearance: Yellow syrup
Density: 1.08 g/cm³
Chemical Name or Material: Bis[3-(triethoxysilyl)propyl]tetrasulfide
Density: 1.074 g/mL
Flash Point: 91 °C (196 °F)
MDL Number: MFCD00053751
CAS: 40372‑72‑3

Boiling Point: 250 °C (decomposition)
Molecular Formula: C18H42O6S4Si2
Solubility Information:
Miscible with toluene, primary alcohols, ketones, benzene,
chlorinated hydrocarbons, acetonitrile, dimethylformamide, and dimethyl sulfoxide.
Immiscible with water.
SMILES: CCOSi(OCC)OCC
Molecular Weight (g/mol): 538.94

Formula Weight: 538.94
Physical Form: Liquid
InChI Key: VTHOKNTVYKTUPI-UHFFFAOYSA-N
IUPAC Name: Triethoxy-[3-(3-triethoxysilylpropyltetrasulfanyl)propyl]silane
PubChem CID: 162012
Concentration or Composition (by Analyte or Components): S 22.3% (typical)
CBNumber: CB1169012
Molecular Formula: C18H42O6S4Si2

Molecular Weight: 538.95
MDL Number: MFCD00053751
MOL File: 40372-72-3.mol
Boiling point: 250 °C
Density: 1.08 g/mL at 20 °C (lit.)
Refractive index: n20/D 1.49
Flash point: 91 °C
Storage temp.: 2–8 °C, stored under nitrogen

Form: Liquid
Specific Gravity: 1.095
Appearance: Colorless to light yellow liquid
Water Solubility: Miscible with toluene, primary alcohols, ketones, benzene, chlorinated hydrocarbons, acetonitrile, dimethylformamide, and dimethyl sulfoxide. Immiscible with water.
Hydrolytic Sensitivity: 7: reacts slowly with moisture/water
BRN: 2062235

InChI: InChI=1S/C18H42O6S4Si2/c1-7-19-29(20-8-2,21-9-3)17-13-15-25-27-28-26-16-14-18-30(22-10-4,23-11-5)24-12-6/h7-18H2,1-6H3
InChIKey: VTHOKNTVYKTUPI-UHFFFAOYSA-N
SMILES: CCOSi(OCC)CCCSSSSCCCSi(OCC)OCC
CAS Database Reference: 40372-72-3 (CAS Database Reference)
FDA UNII: J98V193ZRY
EPA Substance Registry System: 3,16-Dioxa-8,9,10,11-tetrathia-4,15-disilaoctadecane, 4,4,15,15-tetraethoxy- (40372-72-3)
UNSPSC Code: 12352103
NACRES: NA.22

Empirical Formula (Hill Notation): C18H42O6S4Si2
CAS Number: 40372-72-3
Molecular Weight: 538.95
Beilstein: 2062235
EC Number: 254-896-5
MDL number: MFCD00053751
UNSPSC Code: 12352103

PubChem Substance ID: 329750768
NACRES: NA.22
Physical state: Liquid
Color: Yellow
Odor: No data available
Melting point/freezing point: No data available
Initial boiling point and boiling range: No data available
Flammability (solid, gas): No data available
Upper/lower flammability or explosive limits: No data available

Flash point: 100 °C (closed cup)
Autoignition temperature: No data available
Decomposition temperature: No data available
pH: No data available
Viscosity:
Viscosity, kinematic: No data available
Viscosity, dynamic: No data available
Water solubility: No data available
Partition coefficient: n-octanol/water: No data available

Vapor pressure: No data available
Density: 1.08 g/cm³ at 20 °C (lit.)
Relative density: No data available
Relative vapor density: No data available
Particle characteristics: No data available
Explosive properties: No data available
Oxidizing properties: No data available
Other safety information: No data available

CAS No: [40372-72-3]
Product Code: FB33713
MDL No: MFCD00053751
MOL file: Download
Chemical Formula: C18H42Si2S4O6
Molecular Weight: 538.96 g/mol
SMILES: CCOSi(OCC)OCC
Boiling Point: 250.00 °C

Density: 1.100 g/cm³
Flash Point: 100.00 °C
Molecular Weight: 538.95
Exact Mass: 538.95
EC Number: 254-896-5
UNII: J98V193ZRY
DSSTox ID: DTXSID3029362
HS code: 2931900090
PSA: 157
XLogP3: 8.04

Appearance: Dry powder; liquid; other solid; pellets, large crystals, liquid
Density: 1.10 g/cm³
Boiling Point: 250 °C
Flash Point: 91 °C
Refractive Index: 1.504
Water Solubility: Miscible with toluene, primary alcohols, ketones, benzene,
chlorinated hydrocarbons, acetonitrile, dimethylformamide, and dimethyl sulfoxide.
Immiscible with water.

Linear Formula: C₁₈H₄₂O₆S₄Si₂
CAS Number: 40372-72-3
EC Number (EINECS): 254-896-5
Molecular Weight: 538.95 g/mol
Exact Mass: 538.14027682
Monoisotopic Mass: 538.14027682
Molecular Formula: C₁₈H₄₂O₆S₄Si₂
MDL Number: MFCD00053751
BRN: 2062235

InChI: InChI=1/C18H42O6S4Si2/c1-7-19-29(20-8-2,21-9-3)17-13-15-25-27-28-26-16-14-18-30(22-10-4,23-11-5)24-12-6/h7-18H2,1-6H3
InChIKey: VTHOKNTVYKTUPI-UHFFFAOYSA-N
SMILES: Not provided
IUPAC Name: Not provided
Traditional Name: Not provided
Physical and Chemical Properties:
Appearance: Clear liquid
Density: 1.08 g/mL at 20 °C (lit.)

Boiling Point: 250 °C
Flash Point: 91 °C
Refractive Index: n²⁰/D 1.49
Specific Gravity: 1.095
Vapor Pressure: 5.34 × 10⁻¹⁰ mmHg at 25 °C
Water Solubility: Immiscible with water
Solubility: Soluble in ethanol, acetone, benzene, toluene, and other solvents
Storage Conditions: Room temperature

Sensitivity: Reacts slowly with moisture/water (sensitivity class 7)
Molecular Characteristics:
Hydrogen Bond Acceptor Count: 10
Rotatable Bond Count: 23
Topological Polar Surface Area (TPSA): 157 Å²
Heavy Atom Count: 30
Complexity: 321
Covalently-Bonded Unit Count: 1
Compound Is Canonicalized: Yes

FIRST AID MEASURES of BIS-(3-TRIETHYOXYSILYLPROPYL)TETRASULFIDE:
-Description of first-aid measures
*General advice:
Show this material safety data sheet to the doctor in attendance.
*If inhaled:
After inhalation:
Fresh air.
*In case of skin contact:
Take off immediately all contaminated clothing.
Rinse skin with
water/ shower.
*In case of eye contact:
After eye contact:
Rinse out with plenty of water.
Call in ophthalmologist.
Remove contact lenses.
*If swallowed:
After swallowing:
Immediately make victim drink water (two glasses at most).
Consult a physician.
-Indication of any immediate medical attention and special treatment needed.
No data available

ACCIDENTAL RELEASE MEASURES of BIS-(3-TRIETHYOXYSILYLPROPYL)TETRASULFIDE:
-Environmental precautions:
Do not let product enter drains.
-Methods and materials for containment and cleaning up:
Cover drains.
Collect, bind, and pump off spills.
Observe possible material restrictions.
Take up dry.
Dispose of properly.
Clean up affected area.

FIRE FIGHTING MEASURES of BIS-(3-TRIETHYOXYSILYLPROPYL)TETRASULFIDE:
-Extinguishing media:
*Suitable extinguishing media:
Carbon dioxide (CO2)
Foam
Dry powder
*Unsuitable extinguishing media:
For this substance/mixture no limitations of extinguishing agents are given.
-Further information:
Prevent fire extinguishing water from contaminating surface water or the ground water system.

EXPOSURE CONTROLS/PERSONAL PROTECTION of BIS-(3-TRIETHYOXYSILYLPROPYL)TETRASULFIDE:
-Control parameters:
--Ingredients with workplace control parameters:
-Exposure controls:
--Personal protective equipment:
*Eye/face protection:
Use equipment for eye protection.
Safety glasses
*Body Protection:
protective clothing
*Respiratory protection:
Recommended Filter type: Filter A
-Control of environmental exposure:
Do not let product enter drains.

HANDLING and STORAGE of BIS-(3-TRIETHYOXYSILYLPROPYL)TETRASULFIDE:
-Conditions for safe storage, including any incompatibilities:
*Storage conditions:
Tightly closed.
Dry.

STABILITY and REACTIVITY of BIS-(3-TRIETHYOXYSILYLPROPYL)TETRASULFIDE:
-Chemical stability:
The product is chemically stable under standard ambient conditions (room temperature).
-Possibility of hazardous reactions:
No data available