Ethyl 3-[(Tetrahydropyranyl)oxy]butanoate is an intermediate in the synthesis of Dibutyl 3-Hydroxybutyl Phosphate (D428155). Dibutyl 3-Hydroxybutyl Phosphate is produced from the metabolism of the organophosphorus solvent, tributyl phosphate (TBP). TBP-OH has also been produced during radiolysis of TBP.