Silicones & Silicates
REACH
Bis(triethoxysilylpropyl)tetrasulfide
CAS Number
40372-72-3
EC Number
254-896-5
Abbreviation
TESPT
What is Bis(triethoxysilylpropyl)tetrasulfide?
Bis(triethoxysilylpropyl)tetrasulfide (CAS 40372-72-3) is a bifunctional organosilane coupling agent for rubber compounding and polymer processing.
Where is Bis(triethoxysilylpropyl)tetrasulfide used?
- Rubber compounding: bridges inorganic fillers with organic polymer matrices
- Tire manufacturing: coupling agent for silica-reinforced tread compounds, reducing rolling resistance and improving wet grip
- Rubber goods: enhances tensile strength and abrasion resistance in belts, hoses and seals
- Plastics and polymer compounding: surface modifier for mineral fillers, improving dispersion and adhesion
- Coatings and adhesives bond silica or glass substrates to sulfur-crosslinkable polymer systems.
Commercial specifications
- Drums and intermediate bulk containers
- Purity confirmed by silane content and sulfur rank distribution
Other Names (Synonyms)
4,4,15,15-tetraethoxy-3,16-dioxa-8,9,10,11-tetrathia-4,15-disilaoctadecane|bis-(3-triethyoxysilylpropyl)tetrasulfide|Triethoxy-[3-(3-triethoxysilylpropyltetrasulfanyl)propyl]silane|Bis[3-(triethoxysilyl)propyl] tetrasulfide|TESPT
What are the physical properties of Bis(triethoxysilylpropyl)tetrasulfide?
Boiling Point 250 °C
Density 1.07 g/cm³
Flash Point 91°C
Appearance Yellowish clear liquid
Form Liquid
Water Solubility Miscible with toluene, primary alcohols, ketones, benzene, chlorinated hydrocarbons, acetonitrile, dimethylformaminde and dimethysulfoxide. Immiscible with water.
Refractive Index n 20/D 1.49
Which trade and regulatory codes apply to Bis(triethoxysilylpropyl)tetrasulfide?
HS Code 29309090
WGK (Germany) 1