Reaction of recoil tritium atoms with ethyl alcohol in the gas phase has been studied in the presence of moderator and scavenger. The total amount of tritium produced from3He (n, p) T reaction under given irradiation conditions is determined by adding methane as a monitor for each set of sample. The HT, CH3T, C2H5T and C2H4TOH yields were due to the decrease of hot reaction with increasing moderator pressure. On the other hand, the C2H3T yield, due to the unimolecular reaction of excited CH4TOH* or C2H5T* moleculas, decreased with increasing pressure. All tritiated compounds were analyzed by radio gas chromatography.