cude STC Silicon tetrachloride CAS No.: 10026-04-7 Molecular Formula : SiCl4 Melting point: -70centigrade Load with Tank

cude STC Silicon tetrachloride

Product Name     : Silicon Tetrachloride

Molecular formula   : SiCl4  

Molecular weight    : 169.90

Density (P20, g/cm3  ): 1.483Melting point: -70centigrade Boiling point         : 57.6°C Flash point          : -9°C

STC specification : Purity 99%↑

CAS No.: 10026-04-7

Appearance : Colorless and transparent

Reuse of by-products[recovery process] 

By-products in the reduction process for the manufacture of polycrystalline silicon include silicon tetrachloride and hydrogen gas. The silicon tetrachloride is reused as a feedstock for making trichlorosilane in the conversion process, but part of it is refined over and over again to make it ultra-pure, and shipped as a material for making products such as precision optical lenses. The hydrogen gas, the other by-product in the reduction process, is used as a feedstock for the conversion process, and is also reused in the reduction process. 

Silicon tetrachloride production 

The process for reducing trichlorosilane with hydrogen produces polycrystalline silicon and also a gas that includes unreacted trichlorosilane, hydrogen chloride, and silicon tetrachloride. This gas is cooled to recover various components individually, and among of them, silicon tetrachloride is highly purified by distillation.

Applications of Silicon tetrachloride 

Our ultra-pure silicon tetrachloride can be utilized for uses such as a material for the manufacture of precision optical lenses, a material for the manufacture of synthetic quartz, silicon dioxide, silica and as a photomask for semiconductor manufacture. It is also used for optical fibers.

Silicon tetrachloride

StructureThermochemistryHazardsRelated compoundsSupplementary data page

Melting point	−68.74 °C
Boiling point	57.65 °C
Solubility in water	decomposes
Solubility	soluble in benzene, toluene, chloroform, ether
Vapor pressure	25.9 kPa at 20 °C
Crystal structure	Tetrahedral
Coordinationgeometry	4
Std enthalpy offormation ΔfHo298	−687 kJ·mol−1[1]
Standard molarentropy So298	240 J·mol−1·K−1[1]
MSDS	External MSDS
EU Index	014-002-00-4
EU classification	Irritant (Xi)
R-phrases	R14, R36/37/38
S-phrases	(S2), S7/8, S26
NFPA 704
Other anions	Silicon tetrafluorideSilicon tetrabromideSilicon tetraiodide
Other cations	Carbon tetrachlorideGermanium tetrachlorideTin(IV) chlorideTitanium tetrachloride
Related chlorosilanes	ChlorosilaneDichlorosilaneTrichlorosilane
Structure andproperties	n, εr, etc.
Thermodynamicdata	Phase behaviourSolid, liquid, gas
Spectral data	UV, IR, NMR, MS

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cude STC Silicon tetrachloride