Abstract:1.2.3-Benzenetricarboxylic acid (hemimellitic acid) tritiated in position 5 has been labelled at a specific activity of 16.2 Ci/mmol, starting from 3-bromo naphthalic anhydride. Attempts at direct bromination of the acid followed by tritiodebromination, or of general labelling by hydrogen-tritium exchange gave poor results.
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