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SILICON TETRAACETATE

Basic information Introduction Safety Supplier Related

SILICON TETRAACETATE Basic information

Product Name:
SILICON TETRAACETATE
Synonyms:
  • Silicon(IV) Acetate, Anhydrous
  • Tetraacetyl orthosilicate
  • Silicon(iv)acetate, 93%, tech.
  • Silicon(IV) acetate, min. 95%
  • Silicic tetraacetic acid tetraanhydride
  • Tetraacetic acid silicon salt
  • Silicon(IV) Acetate, Anhydrous 99%
  • Silicon tetraacetate 98%
CAS:
562-90-3
MF:
C8H12O8Si
MW:
264.26
EINECS:
209-239-7
Product Categories:
  • metal acetate salt
  • Building Blocks
  • C8 to C9
  • Carbonyl Compounds
  • Chemical Synthesis
  • Organic Building Blocks
  • Acetoxy Silanes
  • Crosslinkers
  • Crosslinking Agents
  • C8 to C9
  • Carbonyl Compounds
  • Esters
Mol File:
562-90-3.mol
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SILICON TETRAACETATE Chemical Properties

Melting point:
111-115 °C(lit.)
Boiling point:
148 °C5 mm Hg(lit.)
Density 
1,18 g/cm3
vapor density 
>1 (vs air)
Flash point:
>110°C
storage temp. 
-20°C
solubility 
Soluble in acetone and benzene.
form 
crystal
color 
white
Water Solubility 
soluble acetone, benzene [MER06]
Hydrolytic Sensitivity
7: reacts slowly with moisture/water
Sensitive 
Moisture Sensitive
Merck 
14,8498
BRN 
994868
CAS DataBase Reference
562-90-3(CAS DataBase Reference)
EPA Substance Registry System
Silicon tetraacetate (562-90-3)
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Safety Information

Hazard Codes 
C
Risk Statements 
34
Safety Statements 
26-36/37/39-45
RIDADR 
UN 3261 8/PG 2
WGK Germany 
3
10
TSCA 
Yes
HazardClass 
8
PackingGroup 
II
HS Code 
29159000

MSDS

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SILICON TETRAACETATE Usage And Synthesis

Introduction

Tetraacetoxysilane is a clear to yellowish liquid with acrid odor of acetic acid (vinegar). It hydrolyzes in the presence of moisture (acetic acid is released) to form silanols, which can react with themselves to pro-duce siloxanes or bind to inorganic substrates.

Chemical Properties

Off-white crystalline solid

Uses

Silicon tetraacetate is used in the preparation of silicon dioxide thin films by a direct photochemical vapor deposition method. It serves as a precursor to prepare silicon complexes with monofunctional bidentate Schiff bases. It is also used as an alternative to silicon hydride and alkoxide for low-temperature silicon dioxide production. Further, it reacts with ethanol in the absence of water to get silica gel and ethyl acetate. In addition, it is employed as a sol-gel precursor.

General Description

Silicon tetraacetate is an alternative to silicon hydride and alkoxide for low-temperature SiO2 production. Silicon tetraacetate reacts with ethanol in absence of water to form silica gel and ethyl acetate. Silicon tetraacetate is reported as a sol-gel precursor.

Purification Methods

It can be crystallised from mixtures of CCl4 and pet ether or Et2O, or from acetic anhydride and then dried in a vacuum desiccator over KOH. Ac2O adheres to the crystals and is removed first by drying at room temperature, then at 100o for several hours. It is soluble in Me2CO, is very hygroscopic and effervesces with H2O. It decomposes at 160-170o. [Schenk in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I p 701 1963, Beilstein 2 H 171.]

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