Tritium labelled compounds Acetic acid

In the case of labeled compounds, entry is normally without special designation in the formula, but name entries under such formulas show the labeled nature of the compound C4H8O2, isobutyric-I-C acid, indicates that the number one carbon atom is labeled. Deuterium and tritium compounds show labeling in the formula index, as CH3DO, methanol-d, or C2H2D2O, acet-d2-aldehyde. 

The reduction of a halogen compound by a metal catalyst such as zinc in the presence of tritiated water or tritium-labelled acetic acid will obviously produce a compound with a tritium atom in place of the original halogen. Reduction of this kind, although sometimes used for labelling, requires an excess of tritium in the water, acetic acid or other solvent. 

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