Silane | Silanes | Chloro Silanes
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| SiSiB® PC5400
Tetrachlorosilane.
Synonym: Silicon Tetrachloride.
Countertype of Degussa Siltet, DowCorning Z-1229
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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.
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| 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 |
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| 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.
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Net weight 210L steel drum or 1000L IBC container, for more details, please visit Packing Centre.
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