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HomeProduct name listTriethoxysilane

Triethoxysilane

  • CAS NO.:998-30-1
  • Empirical Formula: C6H16O3Si
  • Molecular Weight: 164.27
  • MDL number: MFCD00009061
  • EINECS: 213-650-7
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2024-08-14 11:55:41
Triethoxysilane Structural

What is Triethoxysilane?

Description

Triethoxysilane is an organosilicon compound with the formula HSi(OC2H5)3. It is a colourless liquid used in precious metal-catalysed hydrosilylation reactions. The resulting triethoxysilyl groups are often valued for attachment to silica surfaces.Compared to most compounds with Si-H bonds, triethoxysilane exhibits relatively low reactivity. Like most silyl ethers, triethoxysilane is susceptible to hydrolysis. As reducing agent, triethoxysilane can for example be used in reduction of amides, reduction of carbonyl compounds in the presence of cobalt(II) chloride as catalyst, Cu-catalyzed reductive hydroxymethylation of styrenes, and Rh-catalyzed hydrodediazoniation.

Chemical properties

Colorless, clear liquid

Physical properties

bp 134–135 °C; d 0.89 g cm?3.

The Uses of Triethoxysilane

Triethoxysilane is useful reagent for the hydrosilylation of carbon–carbon multiple bonds; reducing agent for carbonyl groups

The Uses of Triethoxysilane

Triethoxysilane is used in metal catalyzed hydrosilylation reactions.

What are the applications of Application

Reduces esters in the presence of zinc hydride catalyst. Reduces aldehydes and ketones to alcohols via the silyl ethers in presence of fluoride ion. Gives 1,2-reduction of enones to allyl alcohols.

General Description

Liquid. Used as a reducing agent.

Air & Water Reactions

May become pyrophoric, by generation of silane

Reactivity Profile

Triethoxysilane has been involved in cases where Triethoxysilane has disproportionated, generating silane (SiH4) which has a history of being pyrophoric.

Health Hazard

Toxicity is similar to silanes. Silanes are moderately irritating to skin, eyes, and mucous membranes. Silane compounds are toxic.

Fire Hazard

When heated to decomposition, Triethoxysilane emits acrid smoke and fumes.

Flammability and Explosibility

Highly flammable

Safety Profile

Poison by intravenous route.Moderately toxic by inhalation. Flammable liquid. Whenheated to decomposition it emits acrid smoke andirritating fumes.

Purification Methods

Fractionate it using a column packed with glass helices of ca 15 theoretical plates in an inert atmosphere. Store it in aliquots in sealed ampoules because it is sensitive to moisture. [Spauschus et al. J Am Chem Soc 72 1377 1950, MacKenzie et al. J Am Chem Soc 72 2032 1950, Havill et al. J Org Chem 13 280 1948, Beilstein 1 IV 1359.]

Properties of Triethoxysilane

Melting point: -170°C
Boiling point: 134-135 °C(lit.)
Density  0.89 g/mL at 25 °C(lit.)
vapor pressure  9.21hPa at 20℃
refractive index  n20/D 1.377(lit.)
Flash point: 80 °F
storage temp.  Store at 0-5°C
solubility  sol diethyl ether, THF, alkanes, aromatic and chlorinated solvents.
form  A liquid
Specific Gravity 0.8753
Water Solubility  Insoluble in water. Soluble in organic solvents.
Sensitive  Moisture Sensitive
Hydrolytic Sensitivity 7: reacts slowly with moisture/water
BRN  1738989
Stability: Stable, but moisture sensitive. Flammable. Incompatible with strong oxidizing agents, strong acids, strong bases.
CAS DataBase Reference 998-30-1(CAS DataBase Reference)
NIST Chemistry Reference Silane, triethoxy-(998-30-1)
EPA Substance Registry System Triethoxysilane (998-30-1)

Safety information for Triethoxysilane

Signal word Danger
Pictogram(s)
ghs
Flame
Flammables
GHS02
ghs
Corrosion
Corrosives
GHS05
ghs
Skull and Crossbones
Acute Toxicity
GHS06
GHS Hazard Statements H226:Flammable liquids
H302:Acute toxicity,oral
H315:Skin corrosion/irritation
H318:Serious eye damage/eye irritation
H330:Acute toxicity,inhalation
Precautionary Statement Codes P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P280:Wear protective gloves/protective clothing/eye protection/face protection.
P301+P312:IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.
P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.
P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

Computed Descriptors for Triethoxysilane

InChIKey QQQSFSZALRVCSZ-UHFFFAOYSA-N

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