Silane Crosslinkers | Oximino Silanes | Oxime Silane | Neutral crosslinkers

SiSiB® PC7400

Tetra(methylethylketoxime)silane in Toluene.
Synonym: Tetra(methylethylketoximino)silane in Toluene;
Tetra(2-butanoneoxime)silane in Toluene;
Tetra (MEKO) silane in Toluene;
TOS in Toluene

Countertype of Hanse OX30, Honeywell OS3000

Chemical Structure


SiSiB® PC7400 is clear and yellowish or colorless liquid with a typical smell (MEKO).

Typical Physical Properties

Chemical Name: Tetra(methylethylketoximino)silane in Toluene
CAS No.: 34206-40-1
EINECS No.: 251-882-0
Empirical Formula: C16H32N4O4Si
Molecular Weight: 372.5
Boiling Point: 110°C [760mmHg]
Flash Point: 4°C
Color and Appearance: Clear, yellow liquid
Density [25°C]: 0.930 +/- 0.005
Refractive Index [25°C]: 1.483 [20°C]
TOS (wt.%) 45-50
TOS-Dimer (wt.%) Max. 4
MEKO (wt.%) Max. 4
Toluene (wt.%) 45-50


SiSiB® PC7400 is used as a neutral curing agent in silicone sealant formulations. Normally, it will be combined with MOS or VOS to achieve higher reactivity, shorter skin formation times and higher crosslinking density.

Another important advantage of using PC7400 in silicone sealants is that extended tooling times can be achieved without jeopardizing crack-resistance.


Net weight 190Kg steel drum or net weight 950Kg IBC tote, for more details, please visit Packing Centre.

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