Triethyl phosphite
CAS 122-52-1
EC 204-552-5
Formula C6H15O3P
MW 166.16 g/mol
Organometallic Compounds Plastics & PolymersAgriculture & FeedLubricants & Metalworking CatalysisAntioxidant & StabilizerPolymerization Initiation
Description
Triethyl phosphite (CAS 122-52-1, EC 204-552-5) is a trivalent organophosphorus compound also referenced as NSC 5284, phosphorus ether, and (C2H5O)3P. It carries no E-code designation and is classified under HS code 29209012 for customs purposes.
In polymer stabilization, triethyl phosphite functions as a hydroperoxide decomposer, interrupting oxidative chain reactions that degrade plastics during processing. In agrochemical synthesis, it serves as a phosphonylating reagent in Arbuzov-type reactions to build organophosphonate intermediates. It also acts as a ligand precursor and catalyst modifier in polymerization processes.
Triethyl phosphite is supplied as a technical-grade liquid compliant with REACH registration requirements. Procurement teams should confirm supplier documentation for purity specifications, SDS availability, and lot traceability. Standard packaging formats include drums and IBC containers, with quantities available to meet both development-scale and industrial-volume requirements.
In polymer stabilization, triethyl phosphite functions as a hydroperoxide decomposer, interrupting oxidative chain reactions that degrade plastics during processing. In agrochemical synthesis, it serves as a phosphonylating reagent in Arbuzov-type reactions to build organophosphonate intermediates. It also acts as a ligand precursor and catalyst modifier in polymerization processes.
Triethyl phosphite is supplied as a technical-grade liquid compliant with REACH registration requirements. Procurement teams should confirm supplier documentation for purity specifications, SDS availability, and lot traceability. Standard packaging formats include drums and IBC containers, with quantities available to meet both development-scale and industrial-volume requirements.
Physical Properties
| Melting Point | -112 °C |
| Boiling Point | 157.9 °C |
| Density | 0.9629 g/cm³ @ Temp: 20 °C |
| Flash Point | 130 °F |
| Appearance | Colorless liquid. Insoluble in water; soluble in alcohol and ether. Combustible. |
| Color | colorless |
| Odor | characteristic, obnoxious, phosphiteodor |
| Form | liquid |
| Water Solubility | slightly soluble |
| Vapor Pressure | <6 hPa (20 °C) |
| Refractive Index | n 20/D 1.413(lit.) |
Safety & Handling (Learn More)
Warning GHS02 GHS07 GHS08
H
H226H302H315H317H319H320H332H335H361H371H402H412
P
P203P210P233P240P241P242P243P260P261P264P270P271P272P273P280P317P318P319P321P330P405P501P264+P265P301+P317P302+P352P304+P340P308+P316P332+P317P333+P317P337+P317P362+P364P370+P378P403+P233P403+P235P303+P361+P353P305+P351+P338
Trade & Regulatory
| HS Code | 29209012 |
| UN Number | 2323 |
| ADR Class | 3 |
| Packing Group | III |
| Storage Class | 3 - Flammable liquids |
| WGK (Germany) | 1 |
Other Names
triethylphosphiteTEPtriethyl(C2H5O)3PPhosphorus etherTriethoxyphosphinefosforyntrojetylowy
Related Products
Raw Materials
Derivatives
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