3-Fluoropropyl Tosylate-d6 is the isotope labelled analog of 3-Fluoropropyl Tosylate (F598625); the tosyl protected form of 3-Fluoropropan-1-ol (F598605) which is a reagent used to synthesize fluorinated amino acids (e.g. DL-erythro-4-Fluoroglutamine [F591630]) and labelled N-desmethyl-loperamide analogues which have potential use as imaging radiotracers.