Silane | Silanes | Alkyl & Alkoxy Silanes | Surface Modifier | Hydrophobing Agents | Water Repellent

SiSiB® PC5931

Synonym: Propyl trimethoxysilane.

Countertype of Evonik Dynasylan PTMO, Catylen D800, DowCorning Z-6265, ShinEtsu KBM-3033, Eurenor 5025

Chemical Structure


SiSiB® PC5931 is an alkylalkoxysilane. It is a colorless, low viscosity liquid. It has an n-propyl organic group and a trimethoxysilyl inorganic group. It provides a hydrophobic surface treatment.

Typical Physical Properties

Chemical Name: n-Propyltrimethoxysilane
CAS No.: 1067-25-0
EINECS No.: 213-926-7
Empirical Formula: C6H16O3Si
Molecular Weight: 164.27
Boiling Point: 142°C [760mmHg]
Flash Point: 34°C
Color and Appearance: Colorless or yellowish clearliquid
Density [25°C]: 0.932
Refractive Index [25°C]: 1.3880 [25°C]
Purity: 99% by GC


SiSiB® PC5931 is an important material in sol-gel production.

SiSiB® PC5931 may provides a hydrophobic surface treatment for inorganic powders or filler materials.

SiSiB® PC5931 is one of the catalyst components for polyolefin production with Ziegler-Natta catalysts.

SiSiB® PC5931 reacts faster with water than SiSiB® PC5932. Customer may regulate the rate of hydrolysis according to actual application.


Net weight 180Kg steel drum or 900Kg IBC container, for more details, please visit Packing Centre.

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