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8.00658 EMD Millipore

Tetraethyl orthosilicate

Tetraethyl orthosilicate for synthesis. CAS 78-10-4, EC Number 201-083-8, chemical formula (C₂H₅O)₄Si., for synthesis

Synonym: Tetraethoxysilane

  • CAS Number 78-10-4

  • Linear Formula C₈H₂₀O₄Si

  • Molecular Weight 208.33 g/mol

  •  EC Number 201-083-8



packaging   10 kg in Barrel PE/met (8006589010)
  2 g in Gas cylinder (8006588002)
  50 kg in Barrel PE/met (8006589050)
bp   168.0 °C (1013 hPa)
expl. lim.     1.3 - 23 %(V)
vapor pressure   2 hPa (20 °C)
density   0.94 g/cm3 (20 °C)
flash point   45 °C
autoignition temp.   230 °C
mp   -85.5 °C
LD 50 oral   LD50 Rat 6270 mg/kg
LD 50 dermal   LD50 Rabbit 5860 mg/kg
shipped in   ambient
storage temp.   Store below +30°C.
specifications   Assay (GC, area%): ≥ 99.0 % (a/a)
  Density (d 20 °C/ 4 °C): 0.932 - 0.934
  Identity (IR): passes test

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Safety Information

HS Code 
2920 90 70
Hazard Statement(s) 
H226: Flammable liquid and vapour.
H319: Causes serious eye irritation.
H332: Harmful if inhaled.
H335: May cause respiratory irritation.
Precautionary Statement(s) 
P210: Keep away from heat.
P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Storage class 
3 Flammable liquids
WGK 1 slightly water endangering
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).
Hazard Pictogram(s) 
GHS02  GHS02
Hazard Pictogram(s) 
GHS07  GHS07
Hazard Symbols 
Harmful  Harmful
Declaration (railroad and road) ADR, RID 
UN 1292 , 3, III
Declaration (transport by air) IATA-DGR 
UN 1292 , 3, III
Declaration (transport by sea) IMDG-Code 
UN 1292 , 3, III
Categories of danger 
flammable, harmful, irritant
R Phrase 
R 10-20-36/37
Flammable.Harmful by inhalation.Irritating to eyes and respiratory system.
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