Home » Products » Organofunctional Silanes » Sulfur Silanes » Bis[3-(triethoxysilyl)propyl]tetrasulfide



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  • SCA-S69X

  • 40372-72-3

1.Product Introduction of the Bis[3-(triethoxysilyl)propyl]tetrasulfide(CAS:40372-72-3)

Bis[3-(triethoxysilyl)propyl]tetrasulfide(CAS:40372-72-3), Our model SCA-S69X (equivalent to Silquest® A-1289,Si-69),is  is a sulfur-containing organofunctional silane used in the rubber industry in combination with fillers that carry silanol groups.

2. Product Parameter (Specification) of the Bis[3-(triethoxysilyl)propyl]tetrasulfide(CAS:40372-72-3)




Yellowy, transparent liquid

Sulfur Content, %

≥ 22

Specific Gravity (ρ20), g/cm3


Refractive Index( )


Flash Point, ℃


3.Application of the Bis[3-(triethoxysilyl)propyl]tetrasulfide(CAS:40372-72-3)

SCA-S69X reacts with fillers containing silanol groups during mixing and with the polymer during the vulcanization process under formation of covalent chemical bonds. This imparts better tensile strength, higher module, reduced compression set, increased abrasion resistance and optimized dynamic properties. SCA-S69X is used in many applications where white fillers containing silanol groups are involved and optimum technical properties are required.
1. Tires: An excellent reinforcing agent in tires to reduce heat built-up, reduce rolling resistance and improve the tires´ wet grip.
2. Shoe Soles: Generally applicable silane for improving abrasion resistance of sole compounds containing precipitated silica.
3. Mechanical Rubber Goods: General use silane for achieving good dynamic properties, low compression set and high abrasion resistance in mixtures containing white fillers.
4. Adhesives and sealants: An excellent adhesion promoter to glass, aluminum, steel and other inorganic surface in polysulfide, nitrile and other rubber adhesives, sealants and coatings.

4.Packing Details of the Bis[3-(triethoxysilyl)propyl]tetrasulfide(CAS:40372-72-3)

The regular packing of Bis[3-(triethoxysilyl)propyl]tetrasulfide(CAS:40372-72-3)is 25kg plastic pail, 200L steel drums and 1000L immediate bulk container.

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5.Storage and Shelf Life of Bis[3-(triethoxysilyl)propyl]tetrasulfide(CAS:40372-72-3)

Should be stored in dry, cool, ventilated room; keep away from water, moisture, high temperature and fire. This product has a shelf life of at least 12 months if stored in tightly closed original container at room temperature.

If this product is kept beyond the shelf life recommend on the product label, it is not necessarily unusable, but a quality control should be performed on the properties relevant to the application.

6.Deliver,Shipping And Serving of the Bis[3-(triethoxysilyl)propyl]tetrasulfide(CAS:40372-72-3)

Based on the quantity of Bis[3-(triethoxysilyl)propyl]tetrasulfide(CAS:40372-72-3), we can delivery you by sea, by air and by express.


Q1what is the form of Bis[3-(triethoxysilyl)propyl]tetrasulfide(CAS:40372-72-3) we can supply?

A1:For Bis[3-(triethoxysilyl)propyl]tetrasulfide(CAS:40372-72-3), we can supply  liquid form, solid form:SCA-S69X rubber masterbatch,The mixture of SCA-S69X and silica (65:35),Bis[3-(triethoxysilyl)propyl]tetrasulfide with Silica,Bis[3-(triethoxysilyl)propyl]tetrasulfide with Carbon Black.

Q2.what are the equivalents of some other silane manufacturers?

A2:The equivalents of Bis[3-(triethoxysilyl)propyl]tetrasulfide(CAS:40372-72-3), please see the list as below:



Silquest® A-1289

Momentive (formerly OSi Specialties)


Dow Corning


Evonik (formerly Degussa)




UCT (United Chemical Technologies, Inc)

Nanjing, Jiangsu,China
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