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Bis[3-(triethoxysilyl)propyl]tetrasulfide structure
Chemical Name:
TESPT;A-1289;CouplingagentG-407;Bis[3-(triethoxysily;Silane coupler KH-858;Si-69 Silane coupling agent;3-triethoxy-silylpropyl-tetrasulfane;Bis(triethoxysilylpropyl)tetrasulfide;Bis(triethoxysililpropyl)tetrasulfane;BIS(TRIETHOXYSILYLPROPYL)TETRASULPHANE
Molecular Formula:
Formula Weight:
MOL File:

Bis[3-(triethoxysilyl)propyl]tetrasulfide Properties

Boiling point:
250 °C
1.08 g/mL at 20 °C(lit.)
refractive index 
n20/D 1.49
Flash point:
Specific Gravity
Water Solubility 
Miscible with toluene, primary alcohols, ketones, benzene, chlorinated hydrocarbons, acetonitrile, dimethylformaminde and dimethysulfoxide. Immiscible with water.
CAS DataBase Reference
40372-72-3(CAS DataBase Reference)
EPA Substance Registry System
3,16-Dioxa-8,9,10, 11-tetrathia-4,15-disilaoctadecane, 4,4,15,15-tetraethoxy-(40372-72-3)
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
Hazard Codes  Xi
Safety Statements  23-24/25
WGK Germany  1
HS Code  29309090
Signal word:
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H227 Combustible liquid Flammable liquids Category 4 Warning P210, P280, P370+P378, P403+P235,P501
H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362
H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P
H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
Precautionary statements:
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
P405 Store locked up.

Bis[3-(triethoxysilyl)propyl]tetrasulfide price More Price(5)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 15200 Bis[3-(triethoxysilyl)propyl] tetrasulfide technical, ≥90% (NMR) 40372-72-3 50ml $194 2018-11-13 Buy
Alfa Aesar 042410 Bis[3-(triethoxysilyl)propyl]tetrasulfide, S 22.3% (typical) 40372-72-3 5g $31.9 2018-11-16 Buy
Alfa Aesar 042410 Bis[3-(triethoxysilyl)propyl]tetrasulfide, S 22.3% (typical) 40372-72-3 25g $92.9 2018-11-16 Buy
Alfa Aesar 042410 Bis[3-(triethoxysilyl)propyl]tetrasulfide, S 22.3% (typical) 40372-72-3 100g $254 2018-11-16 Buy
Alfa Aesar 042410 Bis[3-(triethoxysilyl)propyl]tetrasulfide, S 22.3% (typical) 40372-72-3 500g $507 2018-11-16 Buy

Bis[3-(triethoxysilyl)propyl]tetrasulfide Chemical Properties,Uses,Production


When used in rubber compounds, it 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-(TRIETHOXYSILYL)PROPYL]TETRASULFIDE couples the non-black pigment and elastomers resulting in increases in modulus and increase in abrasion resistance.
Cure Equilibrium - BIS[3-(TRIETHOXYSILYL)PROPYL]TETRASULFIDE has four sulfur atoms positioned in the center. At cure temperatures, these participate with sulfur in producing polysulfidic crosslinks. The BIS[3-(TRIETHOXYSILYL)PROPYL]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-(TRIETHOXYSILYL)PROPYL]TETRASULFIDE and certain thiuram accelerators, produces compounds with excellent heat aging characteristics in addition to the coupling effects. BIS[3-(TRIETHOXYSILYL)PROPYL]TETRASULFIDE is a silane coupling agent that has crosslinking and accelerator activity in rubber compounds.
Area of rubber industry where they would be beneficial
Footwear - Abrasion resistance | Cutting and chunking resistance | Flex life improvement
Rolls - Abrasion resistance | Aging resistance | Processing | Set reduction (better load bearing) | Reduced water swell | Lower hysteresis
Mechanical Molded Goods - Increased modulus | Better heat aging | Compression set reduction | Dynamic property improvement | Reduced swell to polar liquids | Filler substitution (non-black for black)
Hose - Improved abrasion on cover | Better heat aging | Increased modulus | Lower compression set | Improved adhesion to reinforcing elements
Solid Tires - Improved abrasion | Lower hysteresis | Higher modulus | Improved processing | Possibly better adhesion
Tires - Treads for abrasion, hot tear | Carcass for adhesion and/or filler substitution | Breaker (belt) stocks for adhesion
Belts Flat Belts - Increased abrasion | Improved reversion resistance | Reduced cost with clay substitution for black | Improved cord adhesion | Increased flex life and modulus
V Belts - Increased modulus | Improved abrasion | Longer flex life | Improved adhesion to reinforcing elements

Chemical Properties

Yellowish clear liquid

Bis[3-(triethoxysilyl)propyl]tetrasulfide Preparation Products And Raw materials

Raw materials

Preparation Products

Bis[3-(triethoxysilyl)propyl]tetrasulfide Suppliers

Global( 156)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Henan DaKen Chemical CO.,LTD.
+86-371-55531817 CHINA 22043 58
Henan Tianfu Chemical Co.,Ltd.
0371-55170693 CHINA 20786 55
Mainchem Co., Ltd.
+86-0592-6210733 CHINA 32651 55
Chemson Industrial (Shanghai) Co., Ltd.
86-21-65180813 CHINA 121 58
Chemwill Asia Co.,Ltd.
86-21-51861608;;; CHINA 24118 58
Hubei Jusheng Technology Co.,Ltd.
86-188-71490254 CHINA 20229 58
career henan chemical co
+86-371-86658258 CHINA 19997 58
J & K SCIENTIFIC LTD. 400-666-7788 +86-10-82848833
+86-10-82849933; China 96815 76
Meryer (Shanghai) Chemical Technology Co., Ltd. +86-(0)21-61259100(Shanghai) +86-(0)755-86170099(ShenZhen) +86-(0)10-62670440(Beijing)
+86-(0)21-61259102(Shanghai) +86-(0)755-86170066(ShenZhen) +86-(0)10-88580358(Beijing) China 40395 62
Alfa Aesar 400-610-6006; 021-67582000
021-67582001/03/05 China 30291 84

View Lastest Price from Bis[3-(triethoxysilyl)propyl]tetrasulfide manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2018-08-12 Bis[3-(triethoxysilyl)propyl]tetrasulfide
US $1.00 / KG 1G 99% 100kg career henan chemical co

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