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TRIPHENYL PHOSPHITE

Triphenyl phosphite (TPP) is an organophosphorus compound that serves as a versatile reagent in the synthesis of phosphorus ligands.

Triphenyl phosphite is a clear, pale yellow liquid with a clean, pleasant odor.

Triphenyl phosphite is used to convert alcohols to alkyl halides, as a peptide coupling agent, and, in combination with ozone, as a low-temperature source of singlet oxygen, and ligand for metal-catalyzed reactions.
Triphenyl phosphite is also used as reagent in the preparation of mixed valent nickel diphosphine dithiolate bridged iron carbonyl phosphine complexes as models of [NiFe]-hydrogenase active site.

CAS: 101-02-0
European Community (EC) Number: 202-908-4

IUPAC Name: triphenyl phosphite

Molecular Formula: C18H15O3P
Molecular Weight: 310.3 g/mol

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Triphenyl phosphite (TPP) is an organophosphorus compound that serves as a versatile reagent in the synthesis of phosphorus ligands.

Triphenyl phosphite is a clear, pale yellow liquid with a clean, pleasant odor.

Triphenyl phosphite is an organo-phosphite which provides excellent color improvement and heat stability.

Triphenyl phosphite is the chemical compound with the formula P(OC6H5)3. This colourless viscous liquid is the ester of phosphorous acid and phenol.

Triphenyl phosphite is also known as Triphenyl phosphoric acid ester and Triphenoxyphosphine oxide.

Triphenyl phosphite is a clear liquid, used as a performance additive to improve the colour and clarity of alkyd resin, unsaturated polyester resin and various industrial oils during their manufacture.

The manufacture of various resins involves the use of high temperatures, usually in excess of 150° C.
At these temperature the reaction mass tends to get coloured due to oxidation.
Triphenyl phosphite acts as an anti-oxidant and prevents colour formation of the finished product, as a result of which better quality resins are obtained.

Triphenyl phosphite is used to convert alcohols to alkyl halides, as a peptide coupling agent, and, in combination with ozone, as a low-temperature source of singlet oxygen, and ligand for metal-catalyzed reactions.
Triphenyl phosphite is used as a ligand in organometallic chemistry.
Nickel complexes of this ligand are homogeneous catalysts for the hydrocyanation of alkenes.

TPP (Triphenyl phosphite) is a clear liquid with has C18H15O3 as chemical formula.
Triphenyl phosphite is an organo-phosphite which provides excellent colour improvement and heat stability.
Triphenyl phosphite is used in ABS, polyethylene, polypropylene, polystyrene, polyester resins, epoxy resins and synthetic rubber.

Triphenyl phosphite is also known as Triphenyl phosphoric acid ester and Triphenoxyphosphine oxide.

Triphenylphosphite forms zero-valent complexes of the type M[P(OC6H5)3]4 for M = Ni, Pd, Pt.
The colourless nickel complex (m.p. 147 °C) can be prepared from the nickel(0) complex of 1,5-cyclooctadiene:

Ni(COD)2 + 4 P(OC6H5)3 → Ni[P(OC6H5)3]4 + 2 COD

Triphenyl phosphite also forms a variety of Fe(O) and Fe(II) complexes such as the dihydride H2Fe[P(OC6H5)3]4.

Secondary antioxidants
Triphenyl phosphite is called for short TPP, it is also known as triphenoxytitanium phosphine, it is phosphite-based compound, it is a secondary antioxidant, it has light stabilizing effect, it is applicable to polyvinyl chloride, polypropylene, polystyrene, poly acetate, ABS resin, epoxy resin and the like.
Triphenyl phosphite is widely used as polyvinyl chloride chelating agent, when the metal soap is used as stabilizer, coordinating with this product can reduce the harm of the metal chlorides, it can keep transparency of product and inhibit the change in color.
Further triphenyl phosphate is also used as flame retardant plasticizer.
Phosphite phenyl diisooctyl can be obtained by the transesterification reaction of triphenyl phosphite and isooctanol in the presence of catalyst, phosphite phenyl diisooctyl can be used as secondary antioxidant.
Triphenyl phosphite has good resistance to discoloration, it can increase oxidation resistance and light stability.
Triphenyl phosphite has chelating action in PVC, low toxicity, it can be used in plastic medical devices.
In addition, Triphenyl phosphite in the presence of sodium methoxide can proceed the transesterification reaction with methanol to form trimethyl phosphite.
Triphenyl phosphite is as raw material, it can react with octanol in the solution of sodium methoxide, octyl diphenyl phosphite can be prepared.

Triphenyl phosphite (TPP) can be used in combination with metal soap salts to play an excellent synergistic effect, such as ensuring heat resistance in the production process of PVC film, improving coloring and transparency, and forming wrong salts with chloride generated by the decomposition of PVC, delaying the stability in the later stage of processing.
Triphenyl phosphite can also be used as a time-storage stabilizer for PU raw material TDI.
In application, Triphenyl phosphite can be used in combination with other phosphites or directly added to stabilizer formulations or added to PVC batching materials alone.

Product available in different grades like;
1) Lubricant Oil Additive Grade with low Apha
2) Pharma Grade with low Phenol content
3) Flame retardant Grade with low Phenol and Apha content
4) Normal Grade(used for PVC stabilizer)

Grades:
Lubricant Oil Additive Grade with low Apha
Pharma Grade with low Phenol content
Flame retardant Grade with low Phenol and Apha content
Normal Grade(used for PVC stabilizer)

Application

Triphenyl phosphite can be used:
- As a source of phosphorus and as a ligand for the synthesis of transition metal phosphide nanoparticles via heating-up process.
- To convert alcohols to alkyl halides.
- As a peptide coupling agent.
- As a low-temperature source of singlet oxygen after forming an adduct with ozone.
- To synthesize bromotriphenoxyphosphonium bromide, a brominating agent, by reacting with bromine.

• Antioxidants
• Flame Retardants
• Oil & Lubricants
• Paints, inks and coatings
• Pharmaceuticals
• PVC Stabilizers

• Paint, Coating, Ink: Used as stabilizer
• Polymers (including) Adhesives, Styrenics, Engineering, Thermoplastics, Polymers: Used to regulate Viscosity and improve colour stability
• Polyolefins: Used as catalyst
• Polyurethane hot melt adhesives, SBR Rubber, Epoxies: Used to prevent scorching during curing and improve colour stability
• Pharmaceutical Intermediate: Used in Manufacture of 3-C-7 ACCA, Cephalosporin Drugs and Cefexime Formulation

Product Information
CAS number: 101-02-0
EC index number: 015-105-00-7
EC number: 202-908-4
Hill Formula: C₁₈H₁₅O₃P
Chemical formula: (C₆H₅O)₃P
Molar Mass: 310.29 g/mol

Triphenyl phosphite Usage And Synthesis
Secondary antioxidants Triphenyl phosphite is called for short TPP, it is also known as triphenoxytitanium phosphine, it is phosphite-based compound, it is a secondary antioxidant, it has light stabilizing effect, it is applicable to polyvinyl chloride, polypropylene, polystyrene, poly acetate, ABS resin, epoxy resin and the like.
Triphenyl phosphite is widely used as polyvinyl chloride chelating agent, when the metal soap is used as stabilizer, coordinating with this product can reduce the harm of the metal chlorides, it can keep transparency of product and inhibit the change in color.
Further triphenyl phosphate is also used as flame retardant plasticizer.
Phosphite phenyl diisooctyl can be obtained by the transesterification reaction of triphenyl phosphite and isooctanol in the presence of catalyst, phosphite phenyl diisooctyl can be used as secondary antioxidant.
Triphenyl phosphite has good resistance to discoloration, it can increase oxidation resistance and light stability.
Triphenyl phosphite has chelating action in PVC, low toxicity, it can be used in plastic medical devices.
In addition, Triphenyl phosphite in the presence of sodium methoxide can proceed the transesterification reaction with methanol to form trimethyl phosphite.
Triphenyl phosphite is as raw material, it can react with octanol in the solution of sodium methoxide, octyl diphenyl phosphite can be prepared.

Physical and chemical properties
Triphenyl phosphite is colorless or pale yellow oily liquid.
Triphenyl phosphite has slightly with phenol odor.
Molecular weight is 310.
Color (APHA) <50.
Acid value is <0.5mgKOH/g.
Phosphorus content is 10%.
The relative density is 1.
180~1.186 (25°/ 15.5℃).
Viscosity is 12 mPa•s (38℃), 4.5mPa•s (99℃).
The freezing point is 19~24℃.
Melting point is 22~25℃.
Boiling point is 220℃ (1333Pa).
Flash point (open cup) is 218.3℃, ignition point is 243℃.
Refractive index is 1.5880 ~1.5900 (25℃).
Solubility (g/100g solvent): methanol> 10, benzene> 10 acetone> 10, it is insoluble in water.
By effect of phosphorus trichloride and phenol can get triphenyl phosphite.

Chemical properties
Triphenyl phosphite is colorless to pale yellow monoclinic crystal below room temperature.
Triphenyl phosphite is colorless light yellow transparent oily liquid at room temperature or higher, it has pungent odor.
Triphenyl phosphite is insoluble in water, soluble in organic solvents such as ethanol, ethyl ether, acetone, benzene and the like.

Uses
(1) Triphenyl phosphite is used as chelating agents, plastics antioxidant, alkyd resin and pesticide intermediate raw material.
(2) Triphenyl phosphite is used for synthetic rubber and resin stabilizer, PVC antioxidant, alkyd resin and pesticide intermediate raw material.
(3) Triphenyl phosphite is used as secondary antioxidants, it has effect of light stability, it is suitable for polyvinyl chloride, polypropylene, polystyrene, polyester, ABS resin, and epoxy resin.
Triphenyl phosphite is used as chelating agent in PVC products, it can enable products to maintain transparency, and suppresse color change.
Triphenyl phosphite can also be used for the production of trimethyl phosphite.
(5) Antioxidants, stabilizers TPPi is mainly applied to polyvinyl chloride, polyethylene, polypropylene, polystyrene, polyester, ABS resin, epoxy resin, synthetic rubber antioxidant stabilizer for PVC vinyl products as chelating agent, when the metal is as based stabilizer, coordinating with the product can reduce the harm of metal chloride
(6) Chelating agent.
Plastic products antioxidant.
The synthesis of alkyd resins and polyester resins.
(8) Chelating agent, Triphenyl phosphite is widely used in all kinds of PVC products, it can enable products to maintain its transparency and suppress color change, and it can increase the antioxidant and light and heat stability of the primary stabilizer.
In addition, Triphenyl phosphite is also used for PE, PP, ABS, SBS and other products, and it can be used for pesticide intermediates.
Triphenyl phosphite can be used for synthetic alkyd resins and polyester materials and polyester resins.

Triphenyl phosphite (TPP) is the chemical compound with the formula P(OC6H5)3.
This colourless viscous liquid is the ester of phosphorous acid and phenol.
Triphenyl phosphite is used as a ligand in organometallic chemistry.
Nickel complexes of this ligand are homogeneous catalysts for the hydrocyanation of alkenes.

Production methods
Triphenyl phosphite can be obtained from phenol and phosphorus trichloride.
Raw material consumption (kg/t) phenol (freezing point ≥40.4 ℃) 940 phosphorus trichloride (99%) 480

Stabilizer/antioxidant for vinyl plastics and polyethylene, polypropylene, styrene copolymers, and rubber.
Triphenyl phosphite can be used:
As a source of phosphorus and as a ligand for the synthesis of transition metal phosphide nanoparticles via heating-up process.
To convert alcohols to alkyl halides.
As a peptide coupling agent.
As a low-temperature source of singlet oxygen after forming an adduct with ozone.
To synthesize bromotriphenoxyphosphonium bromide, a brominating agent, by reacting with bromine.

Physicochemical Information
Boiling point: 360 °C (1013 hPa) decomposes
Density: 1.184 g/cm3 (20 °C)
Flash point: 210 °C
pH value: 1 (200 g/l, H₂O, 20 °C)
Vapor pressure: <1 hPa (20 °C)

Reactivity Profile
Organophosphates, such as Triphenyl phosphite, are susceptible to formation of highly toxic and flammable phosphine gas in the presence of strong reducing agents such as hydrides.
Partial oxidation by oxidizing agents may result in the release of toxic phosphorus oxides.

Storage
Store Triphenyl phosphite in a cool, dry and well-ventilated area and in line with legal requirements.
Keep Triphenyl phosphite away from heat sources and oxidizing agents.