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CAS NUMBER: 122-52-1
EC NUMBER: 204-552-5
MOLECULAR FORMULA: (C2H5O)3P
MOLECULAR WEIGHT: 166.16
Triethyl phosphite is a high boiling point solvent, a plasticizer for rubber and plastics, and also a catalyst.
Triethyl phosphite is also used as a raw material for the preparation of pesticides and pesticides, and as an ethylating agent for the production of ketene.
In Japan, the 70% of the product is used as a catalyst, and about 20% is used as a solvent.
Triethyl phosphite is a colorless liquid.
Triethyl phosphite is the triester of ethanol and phosphoric acid and can be called "phosphoric acid, triethyl ester".
Triethyl phosphites primary uses are as an industrial catalyst (in acetic anhydride synthesis), a polymer resin modifier, and a plasticizer (e.g. for unsaturated polyesters).
In smaller scale Triethyl phosphite is used as a solvent for e.g. cellulose acetate, flame retardant, an intermediate for pesticides and other chemicals, stabilizer for peroxides, a strength agent for rubber and plastic including vinyl polymers and unsaturated polyesters, etc.
Triethyl phosphite is an organophosphorus compound with the formula P(OCH2CH3)3, often abbreviated P(OEt)3.
Triethyl phosphite is a colorless, malodorous liquid.
Triethyl phosphite is used as a ligand in organometallic chemistry and as a reagent in organic synthesis
The molecule features a pyramidal phosphorus(III) center bound to three ethoxide groups.
Triethyl phosphites 31P NMR spectrum features a signal at around +139 ppm vs phosphoric acid standard.
Triethyl phosphite finds use as a soft ligand.
Triethyl phosphites complexes are generally lipophilic and feature metals in low oxidation states.
Triethyl phosphite is prepared by treating phosphorus trichloride with ethanol in the presence of a base, typically a tertiary amine.
Triethyl phosphite appears as 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.
Triethyl phosphite is an organophosphorus compound.
Triethyl phosphite is used as a ligand in organometallic chemistry and as a reagent in organic synthesis.
In coordination chemistry and homogeneous catalysis, triethyl phosphite finds use as a soft ligand.
Triethyl phosphite is a clear colorless liquid with a strong foul odor.
Triethyl phosphite is a clear to yellowish crystalline solid with a garlic like odour melting at 73 C, decomposes at 200 C.
Triethyl phosphite is very soluble in water and in alcohol.
Triethyl phosphite contains one direct P-H bond (which is not very acidic) and only two hydrogens bonded to oxygen (which are acidic).
The structure of this material is more correctly written (HO)2HPO.
For this reason, this dibasic acid forms two series of salts; the one contains the dihydrogen phosphite ion, H2PO3 - , and the other contains the hydrogen phosphite ion, HPO32-.
Triethyl phosphite is an unstable compound that readily converts to phosphoric acid (H3PO4) in the presence of oxygen or on heating above 180 C.
Triethyl phosphite is prepared by hydrolysis of phosphorus trichloride (or tetraphosphorus hexaoxide) with alcohols or phenols.
Triethyl phosphite esters are called phosphite with the formula (RO)3P.
Triethyl phosphite and phosphite are used as reducing agents in chemical industry because of easy oxidation property to phosphoric acid.
Triethyl phosphites are used as antioxidant, stabilizer and chelating agent in plastic system.
Triethyl phosphites are used as solvent in paint and as flame retardant on fibres.
Triethyl phosphites are used as a chemical intermediate in the production of pharmaceutical ingredients, pesticides, optical brighteners and in lubricant additives and adhesives.
USES OF TRIETHYL PHOSPHITE:
Triethyl phosphite is an organophosphorus compound.
Triethyl phosphite is used as a reducing agent; can react with electrophiles to form phosphonates or phosphates; forms a stable complex with copper(I) iodide.
Triethyl phosphite is a very good nucleophile.
The carbon adjacent to the bromine is the most electrophilic position, and phosphorus is the only nucleophile.
Triethyl phosphite displaces the bromine in an SN2-like process, and back attack by the bromide which is released generates a phosphonate product, in which the α-protons are strongly acidic.
-Catalyst xylene isomer catalyst; olefin polymerization catalyst; tetraethyl lead production catalyst; carbodiimide production catalyst; trialkyl boron and olefin substitution reaction catalyst; high-temperature dehydration of acetic acid to produce ketene The catalyst; the catalyst for the polymerization of styrene and conjugated diene compounds; if used in the polymerization of terephthalic acid and ethylene glycol, it can prevent fiber discoloration.
-Solvent: The solvent of nitrocellulose and cellulose acetate; the solvent used to maintain the life of the organic peroxide catalyst; the solvent used for the dispersion of fluorinated ethylene; the peroxide agent used as the curing catalyst of polyester resin and epoxy resin And thinner.
-Stabilizer: Chlorine insecticide and stabilizer; stabilizer for phenolic resin; solid agent for sugar alcohol resin.
-Curing agent and stabilizer of resin; softener for phenolic resin used in shell molds; softener for vinyl chloride; plasticizer for vinyl acetate polymer; flame retardant for polyester resin .
This product can replace o-Phosphoric acid triethyl ester; Levagard TEP-Z; Phosphoric acid triethyl ester; Triethyl Phosphate; trietile fosfato; Tri Ethyl Phosphate; riethyl phosphate.
-Used as a plasticizer
-additive to grease and resins
-sugarcane ripener
-chemical intermediate
APPLICATION OF TRIETHYL PHOSPHITE:
Triethyl Phosphite has major applications in the Pharmaceutical and Agriculture industry.
Triethyl phosphite is also used for manufacturing PVC Stabilizers and Flame Retardants.
Triethyl phosphite is used as a ligand in organometallic chemistry and as a reagent in organic synthesis.
Triethyl phosphite is used as reference to phosphoric acid standard in 31P NMR spectroscopy.
Triethyl phosphite acts as a reducing agent to prepare 2-phenylindazole from o-nitrobenzylidineaniline as well as reacts with electrophiles to get phosphonates.
Triethyl phosphite forms a stable complex with copper(I) iodide.
Triethyl phosphite finds application in a modified Staudinger reaction for the alkyl bromide to an amine through the azide.
Further, Triethyl phosphite is also used in the preparation of 3-phenyl-2-substituted indoles by reacting with beta-nitro styrenes.
-Used as a reducing agent;
-can react with electrophiles to form phosphonates or phosphates;
-forms a stable complex with copper(I) iodide.
PROPERTIES OF TRIETHYL PHOSPHITE:
-Content: ≥99.5%
-Refractive index (nD20): 1.4050-1.4070
-Acid value (mgKOH/g): ≤0.05
-Water content: ≤0.2%
-Chroma: ≤20
-Specific gravity: 1.069-1.073
PHYSCIAL AND CHEMICAL PROPERTIES OF TRIETHYL PHOSPHITE:
-Triethyl phosphite is a colourless liquid of foul smelling odour with a melting point of –112 °C and boiling point of 158 °C.
-With a density of 0.96 g/cm³ triethyl phosphite is less heavy than water (Römpp, 1999).
-The measured vapour pressure at 20°C is 2.6 hPa (Bayer AG, 1989a).
-A water solubility and log Kow value cannot be determined experimentally due to rapid reaction with water.
-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.
SPECIFICATIONS OF TRIETHYL PHOSPHITE:
-Appearance: Colourless and not turbid
-Purity: 99. 50% Min
-Acidity: 0.05 mg KOH/g Max
-Water Content: 0.2% Max
-Hazen Colour value: 20 Max
-Refractive index: 1.405-1.407
-Density: 1.068-1.073
STABILITY OF TRIETHYL PHOSPHITE:
Stable storage under airtight conditions at room temperature and pressure.
Stable to use under normal ambient temperature.
REACTIVITY PROFILE OF TRIETHYL PHOSPHITE:
Triethyl phosphite is colorless, moderately toxic liquid, combustible.
Flammable when exposed to heat or flame.
When heated to decomposition Triethyl phosphite emits toxic fumes of oxides of phosphorus.
STORAGE OF TRIETHYL PHOSPHITE:
Keep the container tightly closed and store it in a cool, ventilated warehouse without drains or sewers.
The storage temperature should not exceed 35°C, away from incompatible materials, food and beverages.
Keep the container dry, not damp, and avoid moisture pollution.
Keep away from fire and heat sources.
Store separately from oxidants and alkalis, and avoid mixed storage.
The opened container must be sealed and kept upright.
SYNONYM:
triethyl phosphite, triethyl ester
Triethoxyphosphine
triethyl phosphite
triethyl phosphite Triethyl Ester
Ethyl phosphite, (EtO)3P
UNII-6B2R04S55G
Triethyl phosphite, 98%
P(OEt)3
(C2H5O)3P
6B2R04S55G
MFCD00009084
DSSTox_CID_6991
DSSTox_RID_78275
DSSTox_GSID_26991
Fosforyn trojetylowy [Czech]
CAS-122-52-1
