| Identification | More | [Name]
SILICON TETRAACETATE | [CAS]
562-90-3 | [Synonyms]
SILICON (IV) ACETATE
SILICON TETRAACETATE
TETRAACETOXYSILANE
Aceticacid,tetraanhydridewithsilicicacid
aceticacid,tetraanhydridewithsilicicacid(h4sio4)
Silicon(IV)tetraacetate
Silicon(IV) acetate, tech., 93%
SiliconTetraacetate(techgrade)(Highpurityalsoavailable)
SiliconAcetate
Silicon(IV)acetate,min.95%
Silicon(IV) Acetate, Anhydrous
Tetraacetyl orthosilicate
Silicon(iv)acetate, 93%, tech.
Silicon(IV) acetate, min. 95%
Silicic tetraacetic acid tetraanhydride
Tetraacetic acid silicon salt | [EINECS(EC#)]
209-239-7 | [Molecular Formula]
C8H12O8Si | [MDL Number]
MFCD00026184 | [Molecular Weight]
264.26 | [MOL File]
562-90-3.mol |
| Chemical Properties | Back Directory | [Appearance]
Off-white crystalline solid | [Melting point ]
111-115 °C(lit.)
| [Boiling point ]
148 °C5 mm Hg(lit.)
| [density ]
1,18 g/cm3 | [vapor density ]
>1 (vs air)
| [Fp ]
>110°C | [storage temp. ]
0-6°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]
562-90-3(EPA Substance) |
| Hazard Information | Back Directory | [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. | [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.] | [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. |
| Safety Data | Back Directory | [Hazard Codes ]
C | [Risk Statements ]
R34:Causes burns. | [Safety Statements ]
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) . | [RIDADR ]
UN 3261 8/PG 2
| [WGK Germany ]
3
| [F ]
10 | [TSCA ]
Yes | [HazardClass ]
8 | [PackingGroup ]
II | [HS Code ]
29159000 |
| Questions And Answer | Back Directory | [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.
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