Tributyl phosphate (TBP) is an organic compound with the chemical formula \( \text{C}_{12}\text{H}_{27}\text{O}_4\text{P} \). It is an ester formed from the reaction of phosphoric acid with butanol. TBP appears as a colorless to pale yellow liquid and has a characteristic odor.

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Tributyl phosphate by Codex 0 2026-10-20
A neutral oxygen-donor extractant, , often abbreviated TBP. It can solvate metal nitrate species in solvent extraction. Selectivity depends on acidity, metal oxidation state, diluent and subsequent stripping conditions.