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Trioctylphosphine oxide

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Trioctylphosphine oxide molecular structure
Molecular structure

The Sigma-Aldrich catalog lists 7 grades and pack sizes of Trioctylphosphine oxide (CAS 78-50-2). Pick the code you need and request a quote for price and lead time from Klar Chem.

CAS78-50-2
Molecular formulaC24H51OP
Molecular weight386.65 g/mol
IUPAC name1-dioctylphosphoryloctane
SynonymsTri-n-octylphosphine oxide · TOPO · Phosphine oxide, trioctyl- · Cyanex 921 · Hostarex PX 324 · EXU8U2AM5A
Safety & Hazards (GHS) Warning
Irritant Irritant
  • H315 Causes skin irritation
  • H317 May cause an allergic skin reaction

⚠️ For information only (source: EU CLP harmonised classification and ECHA notifications, via PubChem); not a substitute for the official Safety Data Sheet (SDS).

Catalog codes and grades

Brand Product / grade Code
Sigma TRIOCTYLPHOSPHINE OXIDE, FOR EXTRACTION 00676-10G Request Quote
Sigma TRIOCTYLPHOSPHINE OXIDE, REAGENTPLUS, 9 223301-500G Request Quote
Sigma TRIOCTYLPHOSPHINE OXIDE, REAGENTPLUS, 99 223301-100G
223301-25G
223301-5G		 Request Quote
Sigma TRIOCTYLPHOSPHINE OXIDE, TECH., 90% 346187-100G
346187-500G		 Request Quote

For information only; specifications and availability are confirmed at quotation. Prices are not listed.