Silane | Silanes | Chloro Silanes

SiSiB® PC5400

Synonym: Silicon Tetrachloride.

Countertype of Degussa Siltet, DowCorning Z-1229

Chemical Structure


SiSiB® Chlorosilanes are a group of reactive, chlorine-containing silicon compounds, used in many chemical processes. Each such compound has at least one silicon-chlorine bond.

SiSiB® PC5400 is a colourless volatile liquid, usually prepared by the treatment of silicon with chlorine:
Si + 2 Cl2 → SiCl4

SiSiB® PC5400 reacts easily with water, in contrast with carbon tetrachloride. In water, the following reaction occurs:
SiCl4 + 2 H2O → SiO2 + 4 HCl

With methanol and ethanol it reacts to give tetramethyl orthosilicate and tetraethyl orthosilicate:
SiCl4 + 4 ROH → Si(OR)4 + 4 HCl

At higher temperatures homologues of silicon tetrachloride can be prepared by the reaction:
Si + SiCl4 → Si2Cl6 + homologues.

Typical Physical Properties

Chemical Name: Tetrachlorosilane
CAS No.: 10026-04-7
EINECS No.: 233-054-0
Empirical Formula: SiCl4
Molecular Weight: 169.9
Boiling Point: 57°C [760mmHg]
Melting Point: -68°C
Flash Point: Non flammable
Color and Appearance: Clear colorless liquid
Density [25°C]: 1.481
Refractive Index [25°C]: 1.4153
Purity: 99.5% by GC


All chlorosilanes react with water to produce hydrogen chloride. The remaining hydroxyl group bonds to the silicon, initially forming a silol group (analogous to alcohol). In general, this will eventually bond to a solid oxide surface or react with another chlorosilane or silol molecule. In the latter cases, the oxygen atom forms a link between two silicon atoms, analogous to the ether linkage in organic chemicals, and identical to the bonding in silicon dioxide.

SiSiB® PC5400 is used as an intermediate in the manufacture of extremely pure silicon, as it has a boiling point convenient for purification by repeated fractional distillation; SiSiB® PC5400 can be reduced to silicon by hydrogen gas, or hydrolysed to SiO2 as a precursor for extremely pure synthetic fused silica. Very pure silicon is used in large amounts in the semiconductor industry, and also in the production of photovoltaic cells.


Net weight 210L steel drum or 1000L IBC container, for more details, please visit Packing Centre.

Technical Library

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Download 2010 SiSiB® SILANE Catalogue