Home Categories Organic Chemistry Tetraethyl orthosilicate
A7728012

Tetraethyl orthosilicate , 99.999%metalsbasis , 78-10-4

Synonym(s):
TEOS;Tetraethyl orthosilicate;Tetraethoxysilane;Tetraethyl silicate;Tetraethoxysilicon(IV)

CAS NO.:78-10-4

Empirical Formula: C8H20O4Si

Molecular Weight: 208.33

MDL number: MFCD00009062

EINECS: 201-083-8

Update time: 2022-07-08

PRODUCT Properties

Melting point: -77 °C
Boiling point: 168 °C(lit.)
Density  0.933 g/mL at 20 °C(lit.)
vapor density  7.2 (vs air)
vapor pressure  <1 mm Hg ( 20 °C)
refractive index  n20/D 1.382(lit.)
Flash point: 116 °F
storage temp.  Store below +30°C.
solubility  Soluble in ethanol and 2-propanol.
form  Liquid
Specific Gravity 0.934
color  Colorless
explosive limit 1.3-23%(V)
Water Solubility  Hydrolysis
FreezingPoint  -77℃
Sensitive  Moisture Sensitive
Hydrolytic Sensitivity 7: reacts slowly with moisture/water
Merck  14,3851
BRN  1422225
Exposure limits ACGIH: TWA 10 ppm
OSHA: TWA 100 ppm(850 mg/m3)
NIOSH: IDLH 700 ppm; TWA 10 ppm(85 mg/m3)
Dielectric constant 4.1(20℃)
Stability: Stable. Flammable. Incompatible with strong oxidizing agents, water, alkalies, mineral acids.
InChIKey BOTDANWDWHJENH-UHFFFAOYSA-N

Description and Uses

Tetraethyl Orthosilicate is used in the preparation of antidreflective coatings on silicate glass via silicon dioxide. Crosslinking reagent.

Safety

Symbol(GHS) 
GHS02,GHS07
Signal word  Warning
Hazard statements  H226-H319-H332-H335
Precautionary statements  P210-P233-P240-P241-P304+P340+P312-P305+P351+P338
Hazard Codes  Xn
Risk Statements  10-20-36/37-36/37/38
Safety Statements  16-36/37/39-26-24/25
OEB A
OEL TWA: 10 ppm (85 mg/m3)
RIDADR  UN 1292 3/PG 3
WGK Germany  1
RTECS  VV9450000
Autoignition Temperature 230 °C
TSCA  Yes
HS Code  2920 90 70
HazardClass  3
PackingGroup  III
Toxicity LD50 orally in Rabbit: 6270 mg/kg LD50 dermal Rabbit 5860 mg/kg
IDLA 700 ppm

RELATED PRODUCTS