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

SiSiB® PC5821

Synonym: 1-(Trimethoxysilyl)dodecane

Chemical Structure


SiSiB® PC5821 is a long-chain alkyl silane. It is easy to be dissolved in ordinary organic solvent, e.g. hydrocarbon, ether, ketone, etc. It is easy to be hydrolyzed and condensed, generate polysiloxane.

Typical Physical Properties

Chemical Name: Dodecyltrimethoxysilane
CAS No.: 3069-21-4
EINECS No.: 221-332-4
Empirical Formula: C15H34O3Si
Molecular Weight: 290.51
Boiling Point: 118°C [1.7mmHg]
Flash Point: 108°C
Color and Appearance: Clear to straw liquid
Density [25°C]: 0.890
Refractive Index [25°C]: 1.4274 [25°C]
Purity: 97.0% by GC


SiSiB® PC5821 has superior hydrophobicity; it can be used as a water-repellent by impregnation.

SiSiB® PC5821 can be used for the treatment of mineral fillers and pigments or inorganic surfaces.


Net weight 180Kg steel drum, for more details, please visit Packing Centre.

Technical Library

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