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Tetraethylorthosilicate
99+% pure
TEOS
(tetraethoxysilane)
Tetraethyl orthosilicate is the chemical compound with the formula Si(OC2H5)4. Often abbreviated TEOS.
Specifications:
Formula Si(OC2H5)4
CAS Number [78-10-4]
Formula Weight 208.33
Density 0.934 gm/ml
Purity 99+% pure minimum
Boiling Point 108oC
Melting Point -85oC
Flash Point 46oC
Form liquid
Refractive Index n20/D 1.3820
Merck Number 14,3851
EINECS 201-083-8
RTECS VV9450000
Hazard(s): flammable liquid, UN 1292, CL 3, PG III
USE: TEOS is used as a precursor to silicon dioxide in the semiconductor industry and a liquid silicon source used for oxide deposition using LPCVD, APCVD and PECVD processes.
Other applications include coatings for carpets and other objects. TEOS is used in the production of aerogel.