Home Categories Inorganic chemistry Silicon tetrachloride
A7275312

Silicon tetrachloride , AR,99.50% , 10026-04-7

Synonym(s):
Silicon tetrachloride;Silicon(IV) chloride, Tetrachlorosilane;STC;Tetrachlorosilane

CAS NO.:10026-04-7

Empirical Formula: Cl4Si

Molecular Weight: 169.9

MDL number: MFCD00011229

EINECS: 233-054-0

Update time: 2022-07-08

PRODUCT Properties

Melting point: −70 °C(lit.)
Boiling point: 57.6 °C(lit.)
Density  1.483 g/mL at 25 °C(lit.)
vapor density  5.86 (vs air)
vapor pressure  420 mm Hg ( 37.7 °C)
refractive index  1.413
Flash point: 57.6°C
storage temp.  Store below +30°C.
solubility  Miscible with benzene, toluene, chloroform, petroleum ether, carbon tetrachloride, ether and hydrochloric acid.
form  Liquid
color  Colorless
Specific Gravity 1.483
PH 1 (5g/l, H2O)
Water Solubility  reacts
Sensitive  Moisture Sensitive
Hydrolytic Sensitivity 8: reacts rapidly with moisture, water, protic solvents
Merck  14,8500
Dielectric constant 2.4(16℃)
Stability: Stability Moisture sensitive - reacts violently with water. Incompatible with water, acids, bases, alcohols, alkali metals, organics, powdered metals.

Description and Uses

Chlorosilanes (general formula RnHmSiCl4-n-m, where R is an alkyl, aryl, or olefin group) are compounds in which silicon is bound to between one and four chlorine atoms, bonds with hydrogen and/or organic groups making its total number of bonds up to four. Chlorosilanes react with water, moist air, and steam, producing heat and toxic, corrosive hydrogen chloride fumes. Contact between gaseous hydrogen chloride and metals may release gaseous hydrogen, which is inflammable and explosive. Chlorosilanes react vigorously with oxidizing agents, alcohols, strong acids, strong bases, ketones, and aldehydes.

Chlorosilanes are chemical intermediates used in the production of silicon and silicon-containing materials, and in the semiconductor industry; they are also protecting agents for intermediates in pharmaceutical syntheses. The most important industrially utilized silicon halides are trichlorosilane and silicon tetrachloride.
Silicon tetrachloride (SiCl4) can be manufactured by chlorination of silicon compounds such as ferrosilicon or silicon carbide, or by heating silicon dioxide and carbon in a stream of chlorine. It can also be obtained as a by-product in the production of zirconium tetrachloride, and in the past substantial quantities were produced by this route, which in recent decades has lost importance owing to the reduced demand for zirconium in nuclear facilities. Nowadays, industrial silicon tetrachloride is produced either by direct reaction of hydrogen chloride with silicon – this product mainly being employed as an intermediate in fumed silica production – or as the by-product of the production of silane for the microelectronics industry by disproportionation of trichlorosilane.

Safety

Symbol(GHS) 
GHS05,GHS06
Signal word  Danger
Hazard statements  H301+H331-H314-H335
Precautionary statements  P261-P270-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338
Hazard Codes  C,Xi
Risk Statements  20/21/22-34-40-36/37/38-14-67-37-35-20/22
Safety Statements  26-7/8-45-36/37/39-28-27
RIDADR  UN 3264 8/PG 2
WGK Germany  1
RTECS  VW0525000
10-21
TSCA  Yes
HS Code  2812 19 90
HazardClass  8
PackingGroup  II

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