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LC1131 Tetraethyl orthosilicate

for synthesis


Order number Packaging Quantity Price €
AC28131 Glass bottle 250 ml 11.25
AC28131 Glass bottle 1 l 31.50


Product information
Hill Formula C8H20O4Si
Chemical formula (C2H5O)4Si
HS Code 2920 90 85
EC number 201-083-8
Molar mass 208.33 g/mol
EC index number 014-005-00-0
CAS number 78-10-4


Chemical and physical data
Ignition temperature 230 °C
Solubility (20 °C) insoluble,(slow decomposition)
Melting point -85.5 °C
Molar mass 208.33 g/mol
Density 0.93 g/cm3 (20 °C)
pH value (H2O, 20 °C) not applicable
Boiling point 168.0 °C (1013 hPa)
Vapor pressure 10 hPa (20 °C)
Explosion limit 1.3 – 23 %(V)
Flash point 45 °C


Safety information according to GHS
Hazard Statement(s) H226: Flammable liquid and vapour.
H332: Harmful if inhaled.
H319: Causes serious eye irritation.
H335: May cause respiratory irritation.
Precautionary Statement(s) P210: Keep away from heat/sparks/open flames/hot surfaces. – No smoking.
P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Signal Word Warning
Hazard Pictogram(s)
RTECS VV9450000
Storage class 3 Flammable Liquids
WGK WGK 1 slightly water endangering
Disposal 9
Carcinogenic compounds and flammable compounds labelled “Highly toxic” or “Toxic”: container F. Alkyl sulfates are carcinogenic; Take particular care to avoid inhalation and skin contact. To neutralize alkyl sulfates, add dropwise (from a dropping funnel) to concentrated ice-cool Ammonia solution (Cat.No. 105426) with vigorous stirring. Before placing in container D, check the pH with pH Universal indicator strips (Cat.No. 109535).


Safety information
R Phrase R 10-20-36/37
Flammable.Harmful by inhalation.Irritating to eyes and respiratory system.
Categories of danger flammable, harmful, irritant
Hazard Symbol Harmful


Transport information
Declaration (transport by sea) IMDG-Code UN 1292 TETRAETHYL SILICATE, 3, III
Declaration (transport by air) IATA-DGR UN 1292 TETRAETHYL SILICATE, 3, III


Toxicological data
LD 50 oral LD50 rat 6270 mg/kg
LD 50 dermal LD50 rabbit 5860 mg/kg


Assay (GC, area%) ≥ 99 %
Density (d 20 °C/ 4 °C) 0.932 – 0.934
Identity (IR) passes test


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