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ChemicalBook--->CAS DataBase List--->122-52-1

122-52-1

122-52-1 Structure

122-52-1 Structure
IdentificationMore
[Name]

Triethyl phosphite
[CAS]

122-52-1
[Synonyms]

AURORA KA-1231
PHOSPHOROUS ACID TRIETHYL ESTER
TRIETHYL PHOSPHITE
TRIETHYL PHOSPHONATE
(C2H5O)3P
Ethyl phosphite, (EtO)3P
fosforyntrojetylowy
Phosphorus ether
Triethoxyphosphine
triethyl
Triethylphosphit
TriethyPhosphite
Triethylphosphite,98%
TRIETHYLPHOSPHATE ( MIN 98% ) GRADE B
TRIETHYLPHOSPHILE
triethyl phosphite94%
Phosphorous acid triethyl
[EINECS(EC#)]

204-552-5
[Molecular Formula]

C6H15O3P
[MDL Number]

MFCD00009084
[Molecular Weight]

166.16
[MOL File]

122-52-1.mol
Chemical PropertiesBack Directory
[Appearance]

Colorless liquid. Insoluble in water; soluble in alcohol and ether. Combustible.
[Melting point ]

-112°C
[Boiling point ]

65 °C
[density ]

0.969 g/mL at 25 °C(lit.)
[vapor pressure ]

<6 hPa (20 °C)
[refractive index ]

n20/D 1.413(lit.)
[Fp ]

130 °F
[storage temp. ]

Flammables area
[solubility ]

Chloroform (Slightly), Dichloromethane (Slightly), Methanol (Slightly)
[form ]

liquid
[color ]

colorless
[Specific Gravity]

0.969
[Odor]

characteristic, obnoxious, phosphiteodor
[explosive limit]

3.75-42.5%(V)
[Water Solubility ]

slightly soluble
[Hydrolytic Sensitivity]

7: reacts slowly with moisture/water
[Sensitive ]

Air & Moisture Sensitive
[BRN ]

956578
[Dielectric constant]

10.9(65℃)
[Stability:]

Air Sensitive, Moisture Sensitive
[Uses]

Synthesis, plasticizers, stabilizers, lubricant and grease additives.
[CAS DataBase Reference]

122-52-1(CAS DataBase Reference)
[NIST Chemistry Reference]

Phosphorous acid, triethyl ester(122-52-1)
[EPA Substance Registry System]

122-52-1(EPA Substance)
Safety DataBack Directory
[Hazard Codes ]

Xn
[Risk Statements ]

R10:Flammable.
R22:Harmful if swallowed.
R36/37/38:Irritating to eyes, respiratory system and skin .
R20/22:Harmful by inhalation and if swallowed .
[Safety Statements ]

S16:Keep away from sources of ignition-No smoking .
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36:Wear suitable protective clothing .
[RIDADR ]

UN 2323 3/PG 3
[WGK Germany ]

1
[RTECS ]

TH1130000
[F ]

10-23
[Autoignition Temperature]

250 °C
[TSCA ]

Yes
[HazardClass ]

3
[PackingGroup ]

III
[HS Code ]

29209012
[Safety Profile]

Moderately toxic by ingestion. A skin and eye irritant. Flammable liquid when exposed to heat, sparks, or flame. When heated to decomposition it emits toxic fumes of POx.
[Hazardous Substances Data]

122-52-1(Hazardous Substances Data)
[Toxicity]

LD50 orl-rat: 1840 mg/kg JACTDZ 1,218,92
Raw materials And Preparation ProductsBack Directory
[Raw materials]

Ammonium chloride-->Xylene-->Phosphorus trichloride-->Diethyl phosphite-->Methyl Red
[Preparation Products]

4,4'-Vinylenedipyridine-->Cyclopentane-1,1-diacetic acid-->SPIRO[4.5]DECANE-7,9-DIONE-->(2-Aminoethyl)phosphonic acid-->FONOFOS-->1-CYCLOPENTYLIDENE-PROPAN-2-ONE-->2-(2,3-DIHYDRO-1BENZENESULFONYL-PYRROLO[2,3-B]PYRIDIN-3-YL)ETHANAMINE-->2-(2,3-DIHYDRO-1-BENZENESULFONYL-PYRROLO[2,3-B]PYRIDIN-3-YL)ACETONITRILE-->4-Benzofurazancarboxaldehyde-->2-METHYLCYCLOPROPANECARBOXYLIC ACID-->Foscarnet sodium-->THIOPHEN-2-YLMETHYL-PHOSPHONIC ACID DIETHYL ESTER-->GERANIC ACID-->7-METHYL-1,6-OCTADIENE-->Propylphosphonic anhydride-->4-Oxo-9,10-dihydro-4H-benzo(4,5)-cyclohepta-(1,2b)thiophene-->DIETHYL (N-METHOXY-N-METHYLCARBAMOYLMETHYL)PHOSPHONATE-->N-(2-Methylpropylidene)-butylamine-->2-(b-(2-Thienyl)vinyl)benzoicacid-->2-[2-(2-thienyl)ethyl]benzoic acid-->DIETHYL(4-NITROBENZYL)PHOSPHONATE-->1-(2-Cyanostyryl)-4-(4-cyanostyryl)benzene-->Disodium 4,4'-bis(2-sulfostyryl)biphenyl
Hazard InformationBack Directory
[General Description]

A clear colorless liquid with a strong foul odor. Flash point 130°F. Less dense than water and insoluble in water. Vapors heavier than air.
[Reactivity Profile]

TRIETHYL PHOSPHITE(122-52-1) is colorless, moderately toxic liquid, combustible. Flammable when exposed to heat or flame. When heated to decomposition TRIETHYL PHOSPHITE(122-52-1) emits toxic fumes of oxides of phosphorus [Lewis, 3rd ed., 1993, p. 1271].
[Air & Water Reactions]

Flammable. Insoluble in water.
[Health Hazard]

Exposure to high concentrations may cause headache, nausea, and dizziness due to reduced chlolinesterase activity.
[Fire Hazard]

Special Hazards of Combustion Products: May form hazardous decomposition products.
[Chemical Properties]

Triethyl phosphite is a clear colorless liquid with a strong foul odor. Insoluble in water; soluble in alcohol and ether. Combustible.Vapors heavier than air.
[Preparation]

Triethyl phosphite is produced in a closed system by reaction of phosphorous trichlorid and ethanol in the presence of an inorganic or organic base. The product is purified by distillation (Bayer AG, 2002a).
122-52-1 synthesis
Triethyl phosphite is exclusively used as an intermediate for the manufacturing of different products: flame retardants (about 60 %), optical brighteners (about 15 %), pesticides (about 15 %), antioxidants (about 5 %), and pharmaceuticals (about 5 %).
[Reactions]

This reaction is currently used for the preparation of synthetically useful phosphonate reagents employed in modified retinal studies. Thus, diethyl 3-alkoxycarbonyl-2-propenylphosphonates are prepared in 72-91% yields by the reaction of methyl or ethyl 4-bromocrotonates with triethyl phosphite at 150-160°C. Similarly, diethyl 3-(ethoxycarbonyl)-2 methyl-2-propenylphosphonate is prepared in 81% yield from triethyl phosphite and ethyl 3-methyl-4-chlorocrotonate by heating at 180- 200°C.The diethyl (E)- and (Z)-3-ethoxycarbonyl-3 fluoro-2 -methyl-2-propenylphosphonates are respectively obtained from triethyl phosphite and (E)- or (Z)-4-bromo-2-fuoro-3-methyl-2-butenoates at 140°C.
[Flammability and Explosibility]

Flammable
[Toxicity evaluation]

The acute toxicity after oral, dermal, and inhalation exposure is relatively low. The oral LD50s in rats ranged between 1840 mg/kg bw (females) and 2470 mg/kg bw (males). Symptoms of rapid breathing and tremors were observed prior to death. In mice LD50 values above 3700 mg/kg bw were recorded. The 6-hour inhalation LC50 with an aerosol of 1.6-3.5 μm MMAD in rats was between 11,100 mg/m3 (females) and 11,600 mg/m3 (males). Clinical signs included eye and upper respiratory irritation, salivation and rapid, shallow breathing. The dermal LD50 in rabbits was between 2800 mg/kg bw (males) and > 3000 mg/kg bw (females).
Material Safety Data Sheet(MSDS)Back Directory
[msds information]

Phosphorous acid triethyl ester(122-52-1).msds
Spectrum DetailBack Directory
[Spectrum Detail]

Triethyl phosphite(122-52-1)MS
Triethyl phosphite(122-52-1)1HNMR
Triethyl phosphite(122-52-1)13CNMR
Triethyl phosphite(122-52-1)IR1
Triethyl phosphite(122-52-1)IR2
Triethyl phosphite(122-52-1)Raman
Well-known Reagent Company Product InformationBack Directory
[Acros Organics]

Triethylphosphite,94%(122-52-1)
[Alfa Aesar]

Triethyl phosphite, 98%(122-52-1)
[Sigma Aldrich]

122-52-1(sigmaaldrich)
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