Silane Crosslinkers | Acetoxy Silanes | Acidic crosslinkers

SiSiB® PC7950

Ethyltriacetoxysilane (ETAS).
Synonym: Triacetoxy ethyl silane.

Countertype of DowCorning 3-7110, Wacker ES 23, Hanse AC10

Chemical Structure


SiSiB® PC7950 is a clear to yellowish liquid with acrid odor of acetic acid (vinegar). It hydrolyzes in the presence of moisture (acetic acid is released) to form silanols, which can react with themselves to pro-duce siloxanes or bind to inorganic substrates.

Typical Physical Properties

Chemical Name: Ethyltriacetoxysilane
CAS No.: 17689-77-9
EINECS No.: 241-677-4
Empirical Formula: C8H14O6Si
Molecular Weight: 234.28
Boiling Point: 107°C [760mmHg]
Flash Point: 106°C
Color and Appearance: Colorless or yellowish transparent liquid
Density [25°C]: 1.143
Refractive Index [25°C]: 1.4123[25°C]
Purity: Min.95% by GC


SiSiB® PC7950 is used as curing agent in acetoxy crosslinking RTV-1 sealant formulations. Within the curing reaction acetic acid is produced as a byproduct. Therefore, the corrosive reaction of the byproduct with substances like marble or iron has to be taken in consideration when using acetate crosslinkers.

SiSiB® PC7950 does not contain any additives such as catalysts, stabilizers or adhesion promotion agents. If required, these additives have to be added to the sealant formulation separately.


Net weight 200Kg steel drum or 1000Kg IBC container, for more details, please visit Packing Centre.

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