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Triethyl phosphite

CAS No.:122-52-1
Molecular Weight: 166.15500 Molecular Formula: C6H15O3P

Description

Triethylphosphite is an organophosphorus compound with the formula P(OCH2CH3)3, often abbreviated P(OEt)3. This colorless liquid is used as a ligand in organometallic chemistry and as a reagent in organic synthesis, and has a 31P NMR signal at around +139 ppm with reference to a phosphoric acid standard. The molecule features a pyramidal phosphorus(III) center bound to three ethoxide groups. Triethylphosphite is prepared by treating phosphorus trichloride with ethanol in the presence of a base, typically a tertiary amine: PCl3 + 3 EtOH + 3 R3N → P(OEt)3 + 3 R3NH+Cl− Of the many related compounds can be prepared similarly, triisopropyl phosphite is an example (b.p. 43.5 °C/1.0 mm CAS# 116-17-6).

Basic Info

Chemical Name

Triethyl phosphite

Synonyms:

CAS No.:

122-52-1

Molecular Formula:

C6H15O3P

Molecular Weight:

166.15500

PSA:

41.28000

LogP:

2.32280

Properties

Appearance:clear liquid
Density:0.969
Melting Point:-112ºC
Boiling Point:156ºC
Storage temp:Flammables area
Vapour:3.19mmHg at 25°C
Refractive Index:1.421-1.414
Flash Point:52ºC
Solubility:slightly soluble
Stability:Stable at room temperature in closed containers under normal storage and handling conditions.

Safety and Handling

RTECS:UN 2323

Hazard Class:III

Safety Statements:S16

HS Code:2920901200

Packing Group:III

WGK Germany:1

RIDADR:UN 2323

Risk Statements:R10; R20/22

Hazard Codes:Xn

NMR Spectrum