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Silicon tetraacetate

Silicon tetraacetate structure

CAS No:
562-90-3
Formula:
C8H12O8Si
Chemical 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%
Categories:
Chemical Reagents > Silane Reagent

Description

Off-white crystalline solid

Silicon tetraacetate is an alternative to silicon hydride and alkoxide for low-temperature SiO2production. 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.

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.]

Silicon tetraacetate Basic Attributes

Molecular Weight：

264.26

Exact Mass：

264.26

BRN：

994868

EC Number：

209-239-7

UNII：

VZ7LP47EPP

TSCA：

TSCA listed

Color/Form：

white

HScode：

29159000

Characteristics

PSA：

105.20000

Appearance：

white crystal

Density：

1,18 g/cm3

Melting Point：

111-115 °C(lit.)

Boiling Point：

148 °C5 mm Hg(lit.)

Flash Point：

>110°C

Water Solubility：

soluble acetone, benzene [MER06]

Storage Conditions：

0-6°C

Vapor Density：

>1 (vs air)

Critical Temperature & Pressure：

-20°C

Safety Information

Packing level：

Hazard category：

Transport codes：

UN 3261 8/PG 2

wgk germany：

hazard class code：

safety instructions：

26-36/37/39-45

Marks：

Precautionary statement(s)：

P280-P305 + P351 + P338-P310

Hazard Statements：

RIDADR：

UN 3261 8/PG 2

GHS Classification：

|Danger|H314 (100%): Causes severe skin burns and eye damage [Danger Skin corrosion/irritation]|P260, P264, P280, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P321, P363, P405, and P501|Aggregated GHS information provided by 43 companies from 2 notifications to the ECHA C&L Inventory.

Silicon tetraacetate Use and Manufacturing

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.

Manufacturing Info：

Acetic acid, 1,1',1'',1'''-tetraanhydride with silicic acid (H4SiO4): ACTIVE

Computed Properties

Molecular Weight:264.26
Hydrogen Bond Acceptor Count:8
Rotatable Bond Count:8
Exact Mass:264.03014387
Monoisotopic Mass:264.03014387
Topological Polar Surface Area:105
Heavy Atom Count:17
Complexity:280
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes

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