Diethyl phosphite

Synonym: Tert-butyl diethyl phosphite, Diethyl t-butyl phosphite, Phosphorous acid, 1,1-dimethylethyl diethyl ester
CAS Number 762-04-9 | MDL Number MFCD00044573 | EC Number 212-091-6

Diethyl phosphite Chemical Structure

Product CodeP2049
CAS Number762-04-9
Assay (purity)95%+
Purity methodby GC
Molecular weight138.10
Appearancecolorless liquid
Boiling point50-51C
NMRconforms to structure
Molecular formulaC4H11O3P
Linear formula(C2H5O)2P(O)H

Ereztech manufactures and sells this product in small and bulk volumes. Glass ampules, bottles or metal ampules or bubblers are available for packaging. For additional analytical information or details about purchasing Diethyl phosphite contact us at

Safety information

Signal wordDANGER
Hazard statementsH317, H318
Precautionary statementsP261, P272, P280, P302+P352, P305+P351+P338, P310, P321, P333+P313, P363, P501
In TSCA registryYes
Flash point>178C

Certificates of analysis (CoA)

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External identifiers for Tert-butyl diethyl phosphite

Pubchem CID6327654
IUPAC Namediethoxy(oxo)phosphanium
InchI IdentifierInChI=1S/C4H11O3P/c1-3-6-8(5)7-4-2/h8H,3-4H2,1-2H3

Ereztech synthesizes and sells additional P-compounds.

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