Small molecules & peptides

FB precursor (GMP)

Precursor for [¹⁸F]FB (4-[¹⁸F]fluorobenzoic acid)

4-(Ethoxycarbonyl)-N,N,N-trimethylbenzenaminium triflate; 4-(Ethoxycarbonyl)-N,N,N-trimethylbenzenaminium salt with trifluoromethanesulfonic acid; Methanesulfonic acid, trifluoro-, ion(1-), 4-(ethoxycarbonyl)-N,N,N-Trimethylbenzenaminium

CA index name: Benzenaminium, 4-(ethoxycarbonyl)-N,N,N-trimethyl-, salt with trifluoromethanesulfonic acid (1:1)


GMP Product


Molar mass 357.35

CAS RN [124915-06-6]

Purity ≥ 97 %

  • Colorless to off-white solid
  • soluble in chloroform, dichloromethane
  • Tested for bioburden and bacterial endotoxins.


CoA: appearance, ¹H and ¹⁹F NMR spectra, ESI-MS (identity), HPLC (purity), residual solvents: dichloromethan ≤ 5000 ppm, diethyl ether ≤ 5000 ppm, assay (95-105 % HPLC), endotoxins/bioburden: report result


Kilbourn M.R. et al. Aryltrimethylammonium Trifluormethane-sulfonates as Precursors to Aryl [¹⁸F]Fluorides: Improved Synthesis of [¹⁸F]GBR-13119. J. Labelled Compd. Radiopharm. 1989, 27, 823–833.

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