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240907

Sigma-Aldrich

Trimethyl phosphite

≥99%

Synonym(s):

Methyl phosphite, P(OMe)3, Trimethoxyphosphine

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About This Item

Linear Formula:
(CH3O)3P
CAS Number:
121-45-9
Molecular Weight:
124.08
Beilstein/REAXYS Number:
956570
EC Number:
204-471-5
MDL number:
MFCD00008350
UNSPSC Code:
12352108
PubChem Substance ID:
24854442
NACRES:
NA.22

vapor density

4.3 (vs air)

Quality Level

200

vapor pressure

17 mmHg ( 20 °C)

assay

≥99%

form

liquid

reaction suitability

reagent type: ligand
reaction type: Heck Reaction
reagent type: ligand
reaction type: Suzuki-Miyaura Coupling

refractive index

n20/D 1.408 (lit.)

bp

111-112 °C (lit.)

mp

−78 °C (lit.)

density

1.052 g/mL at 25 °C (lit.)

SMILES string

COP(OC)OC

InChI

1S/C3H9O3P/c1-4-7(5-2)6-3/h1-3H3

InChI key

CYTQBVOFDCPGCX-UHFFFAOYSA-N

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General description

Trimethyl phosphite is an organophosphorus compound commonly used as a polymerization catalyst, coating additive, and as an intermediate in the synthesis of flame retardants. In addition, it is also used as an activating reagent in amide formation.

Application

Trimethyl phosphite can be used as a ligand in the synthesis of allyliridium phosphite complexes by direct reaction with allyliridium 1,5-cyclooctadiene complex.

pictograms

FlameExclamation mark
GHS02,GHS07

signalword

Warning

Hazard Classifications

Acute Tox. 4 Oral - Eye Irrit. 2 - Flam. Liq. 3 - Skin Irrit. 2 - STOT SE 3

target_organs

Respiratory system

supp_hazards

EUH014

Storage Class

3 - Flammable liquids

wgk_germany

WGK 1

flash_point_f

82.4 °F - closed cup

flash_point_c

28 °C - closed cup

ppe

Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter

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D H Barton et al.
Bioorganic & medicinal chemistry, 2(4), 259-266 (1994-04-01)
In harmony with our studies on the activation of hydrocarbons by Gif chemistry, we have, in the first part of this paper, studied the mechanism of the lipoxygenase enzymes using soybean lipoxygenase as a model. We have shown with trimethyl
Bangwei Ding et al.
Journal of the American Chemical Society, 125(11), 3248-3259 (2003-03-13)
Trimethyl phosphite, (MeO)(3)P, is introduced as an efficient and selective trap in oxiranylcarbinyl radical (2) systems, formed from haloepoxides 8-13 under thermal AIBN/n-Bu(3)SnH conditions at about 80 degrees C. Initially, the transformations of 8-13, in the absence of phosphite, to
M A Mehlman et al.
Toxicology and applied pharmacology, 72(1), 119-123 (1984-01-01)
Trimethyl phosphite (TMP) is an organophosphorus alkylating agent used primarily in the synthesis of organophosphate compounds. To evaluate teratogenic potential, TMP was administered by gavage to pregnant rats at rates of 16, 49, or 164 mg/kg/day, on gestation Days 6
Tian-lin Zhang et al.
Guang pu xue yu guang pu fen xi = Guang pu, 24(11), 1334-1337 (2005-03-15)
The reactions of unsaturated chloride polyether polyol with trimethyl phosphite have been studied by FTIR, which was prepared by copolymerization of ethanediol, allyl glycidyl ether and epoxychloropropane. The experimental results showed that the reaction included ester-exchange reaction, ester-exchange polymerization and
D Vaughan Griffiths et al.
Organic & biomolecular chemistry, 6(3), 577-585 (2008-01-26)
Dialkyl heteroaroylphosphonates based on thiophene, pyrrole or furan have been prepared and their reactions with trimethyl phosphite investigated. Deoxygenation of the carbonyl groups in these heteroaroylphosphonates occurs to give carbene intermediates, which then undergo further reaction. In the case of
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