INTRODUCTION

Triphenyl phosphite (TPP) is an organophos-phorous compound and is a colorless, viscous liquid with high boiling point. It possesses a characteristic, delicate fragrance. Its uses can be found largely in polymers. Besides, it participates as a reactant in organic syntheses.

Manufacture

The triphenyl ester of phosphorous acid is produced by reaction of phenol with phosphorous trichloride, hydrochloric acid being the by-product.

SynonymsTriphenoxyphosphine
Phosphorous acid triphenyl ester
CAS no.101-02-0
EINECS no.202-908-4
Molecular formula(C6H5O)3P
Molecular weight310.29
Structure

Applications

in Polymers
As an antioxidant and a stabilizer in PVC, PP, PS, epoxy, and ABS resins. TPP imparts excellent color stability and heat stability
Improves color and clarity of alkyd resins
Used in process of emulsion polymerization
in Organic Syntheses
Consumed in some reactions that convert alcohol to acid chloride
As peptide coupling agent
In manufacture of pesticides and optical brighteners
RM for production of trimethyl phosphine
RM for synthesis of other organic phosphites such as diphenyl isodecyl phosphite and diphenyl iso-octyl phosphite
Other Applications
As chelating agent
As additive in lubricants and adhesives
As flame retardant

SPECIFICATIONS

TestUnitSpecifications
AppearanceClear Liquid
Acid ValueMg KOH/gMax 0.1
Specific Gravity @ 25°C1.175-1.189
Refractive Index @ 25°C1.5800 -1.5950
ColorAPHAMax 50
Free Phenol by GC%Max 1.0
Triphenyl phosphite by GC%Min 99.0
Phosphorus%9.7-10.1

STORAGE
The product is stored at ambient temperature.

PACKING
225 kg UN-approved HDPE drum.

REACH Status
TPP offered by ExSyn is registered under EU REACH regulations.

ExSyn offers TPP on commercial scales and welcomes enquiries. No matter the quantity you need, our exceptional quality and service will make ExSyn your supplier of choice! If you need any additional information or SDS, please get in touch with us.

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