Synonym(s): TPP, phosphorous acid triphenyl ester, triphenoxyphosphine oxide, tris(phenoxy)phosphine oxide.

Description

Triphenyl phosphite, is a colorless liquid at ambient. It is widely used in many applications. Triphenyl phosphite is used as an anti-oxidant in plastics, including PVC, PU, PET, SYN and OTS types of plastic. Triphenyl phosphite is also recommended as an auxiliary anti-oxidant in lubricants and greases. In many cases, synergistic effects are achieved when using Triphenyl phosphite together with phenol and amine types of primary anti-oxidants. Triphenyl phosphite is also used in adhesive industry and as an intermediate to synthesize pesticides and flame retardants.

Specification

Property	Specification	Typical Value
Appearance, 25 °C	Colorless clear liquid	Colorless clear liquid
Color, APHA	30 Max	10
Water content, % wt	0.3 Max	0.1
Tertiary amine content, %	0.3 Max	99.5

Properties

Chemical Formula	C₁₈H₁₅O₃P
Molecular Weight	310.28
Appearance, 25 °C	Colorless liquid
Melting Point	22 - 25 °C (72 – 77 °F)
Initial boiling point	360 °C (680 °F)
Density, 25 °C, g/cm³	1.18
Solubility in Water, 25 °C	Insoluble

Applications

Triphenyl phosphite, is useful for a variety of applications, which include, but are not limited to,

Chemical intermediate
Anti-oxidant and stabilizer in plastics
Auxiliary anti-oxidant in lubricants and greases
Catalyst adjuvant in polyolefins
Catalytic ligand in transition metal catalysts

Triphenyl phosphite, is widely used in many industries, which include, but are not limited to, Plastic and rubbers, lubricants and greases, adhesives, coatings, and pharmaceuticals, etc.

Manufacturing Process

Triphenyl phosphite is typically manufactured by reacting phosphorus trichloride and phenol. The side product of the reaction is hydrochloride, a very strong inorganic acid.

Chemical Reactions

Triphenyl phosphite can be oxidized into triphenyl phosphate.

Triphenyl phosphite reacts with elemental sulfur at high temperatures to give triphenyl thiophosphate.

Triphenyl phosphite reacts with Grignard reagents to synthesize trialkyl phosphines.

Spectra

NMR

1H NMR of Triphenyl phosphite

SDBS : https://sdbs.db.aist.go.jp/ , National Institute of Advanced Industrial Science and Technology, February, 3rd, 2025

Packaging

235 kg / drum, 518 lbs / drum

1,134 kg / Tote, 2,500 lbs / Tote

Other packaging sizes available upon request

Documents

TDS

CG 579 Triphenyl Phosphite, TPP, Triphenoxyphosphine Oxide CAS 101-02-2